From 99a85b882f36d9634390dc743ede96463a07f0d7 Mon Sep 17 00:00:00 2001
From: Adam Walsh <adamwalsh14@gmail.com>
Date: Tue, 19 Mar 2019 11:15:17 -0700
Subject: [PATCH 01/37] Update default ECMA version for Acorn parser per v6
 changelog

---
 acorn/README.md | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/README.md b/acorn/README.md
index 3e5f58d95..17c639844 100644
--- a/acorn/README.md
+++ b/acorn/README.md
@@ -54,7 +54,7 @@ an object containing any of these fields:
 - **ecmaVersion**: Indicates the ECMAScript version to parse. Must be
   either 3, 5, 6 (2015), 7 (2016), 8 (2017), 9 (2018) or 10 (2019, partial
   support). This influences support for strict mode, the set of
-  reserved words, and support for new syntax features. Default is 7.
+  reserved words, and support for new syntax features. Default is 9.
 
   **NOTE**: Only 'stage 4' (finalized) ECMAScript features are being
   implemented by Acorn. Other proposed new features can be implemented

From 445453d4d4b91958869ba0de17001b0b37e58e54 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Wed, 20 Mar 2019 10:22:24 +0100
Subject: [PATCH 02/37] Upgrade Rollup

We were using an ancient version
---
 acorn-loose/rollup.config.js | 29 +++++++++++++++++++----------
 acorn-walk/rollup.config.js  | 21 ++++++++++++++-------
 acorn/rollup.config.bin.js   | 12 +++++++-----
 acorn/rollup.config.js       | 21 ++++++++++++++-------
 package.json                 |  4 ++--
 5 files changed, 56 insertions(+), 31 deletions(-)

diff --git a/acorn-loose/rollup.config.js b/acorn-loose/rollup.config.js
index e5cbc30e5..32f6d8a8c 100644
--- a/acorn-loose/rollup.config.js
+++ b/acorn-loose/rollup.config.js
@@ -1,16 +1,25 @@
 import buble from "rollup-plugin-buble"
 
 export default {
-  entry: "./acorn-loose/src/index.js",
-  moduleName: "acorn.loose",
+  input: "./acorn-loose/src/index.js",
+  output: [
+    {
+      file: "acorn-loose/dist/acorn-loose.js",
+      format: "umd",
+      name: "acorn.loose",
+      sourceMap: true,
+      external: ["acorn"],
+      globals: {acorn: "acorn"}
+    },
+    {
+      file: "acorn-loose/dist/acorn-loose.mjs",
+      format: "es",
+      sourceMap: true,
+      external: ["acorn"],
+      globals: {acorn: "acorn"}
+    }
+  ],
   plugins: [
     buble({transforms: {dangerousForOf: true}})
-  ],
-  sourceMap: true,
-  targets: [
-    {dest: "acorn-loose/dist/acorn-loose.js", format: "umd"},
-    {dest: "acorn-loose/dist/acorn-loose.mjs", format: "es"}
-  ],
-  external: ["acorn"],
-  globals: {acorn: "acorn"}
+  ]
 }
diff --git a/acorn-walk/rollup.config.js b/acorn-walk/rollup.config.js
index 2588b1cd8..36f906469 100644
--- a/acorn-walk/rollup.config.js
+++ b/acorn-walk/rollup.config.js
@@ -1,14 +1,21 @@
 import buble from "rollup-plugin-buble"
 
 export default {
-  entry: "acorn-walk/src/index.js",
-  moduleName: "acorn.walk",
+  input: "acorn-walk/src/index.js",
+  output: [
+    {
+      file: "acorn-walk/dist/walk.js",
+      format: "umd",
+      name: "acorn.walk",
+      sourceMap: true
+    },
+    {
+      file: "acorn-walk/dist/walk.mjs",
+      format: "es",
+      sourceMap: true
+    }
+  ],
   plugins: [
     buble({transforms: {dangerousForOf: true}})
-  ],
-  sourceMap: true,
-  targets: [
-    {dest: "acorn-walk/dist/walk.js", format: "umd"},
-    {dest: "acorn-walk/dist/walk.mjs", format: "es"}
   ]
 }
diff --git a/acorn/rollup.config.bin.js b/acorn/rollup.config.bin.js
index 19234cb3b..8a082b069 100644
--- a/acorn/rollup.config.bin.js
+++ b/acorn/rollup.config.bin.js
@@ -1,10 +1,12 @@
 import buble from "rollup-plugin-buble"
 
 export default {
-  entry: "acorn/src/bin/acorn.js",
-  dest: "acorn/dist/bin.js",
-  format: "cjs",
-  external: ["fs", "path", "acorn"],
-  paths: {acorn: "./acorn.js"},
+  input: "acorn/src/bin/acorn.js",
+  output: {
+    file: "acorn/dist/bin.js",
+    format: "cjs",
+    paths: {acorn: "./acorn.js"},
+    external: ["fs", "path", "acorn"]
+  },
   plugins: [buble()]
 }
diff --git a/acorn/rollup.config.js b/acorn/rollup.config.js
index 79dac8ef5..0705d4cbc 100644
--- a/acorn/rollup.config.js
+++ b/acorn/rollup.config.js
@@ -1,14 +1,21 @@
 import buble from "rollup-plugin-buble"
 
 export default {
-  entry: "acorn/src/index.js",
-  moduleName: "acorn",
+  input: "acorn/src/index.js",
+  output: [
+    {
+      file: "acorn/dist/acorn.js",
+      format: "umd",
+      name: "acorn",
+      sourceMap: true
+    },
+    {
+      file: "acorn/dist/acorn.mjs",
+      format: "es",
+      sourceMap: true
+    }
+  ],
   plugins: [
     buble({transforms: {dangerousForOf: true}})
-  ],
-  sourceMap: true,
-  targets: [
-    {dest: "acorn/dist/acorn.js", format: "umd"},
-    {dest: "acorn/dist/acorn.mjs", format: "es"}
   ]
 }
diff --git a/package.json b/package.json
index b208c9259..75ef9ab14 100644
--- a/package.json
+++ b/package.json
@@ -39,8 +39,8 @@
     "eslint-plugin-node": "^5.2.1",
     "eslint-plugin-promise": "^3.5.0",
     "eslint-plugin-standard": "^3.0.1",
-    "rollup": "^0.45.0",
-    "rollup-plugin-buble": "^0.16.0",
+    "rollup": "^1.7.0",
+    "rollup-plugin-buble": "^0.19.0",
     "test262": "git+https://github.com/tc39/test262.git#e39604fa41b1ad0effdcf586e4d554ff2d8c3eb7",
     "test262-parser-runner": "^0.5.0",
     "unicode-11.0.0": "^0.7.7"

From fb7c1212bf2f8cef6f25f28fd95c7ba9a3a2243c Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Wed, 20 Mar 2019 10:34:46 +0100
Subject: [PATCH 03/37] Drop Node versions that don't run current Rollup from
 travis.yml

---
 .travis.yml | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 27e8b8282..9d2bba003 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,9 +3,6 @@ sudo: false
 cache: npm
 matrix:
   include:
-  - node_js: '0.12'
-  - node_js: '4'
-  - node_js: '5'
   - node_js: '6'
   - node_js: '7'
   - node_js: '8'

From b406e91696921894df7d71b640fb933bc16f0ed7 Mon Sep 17 00:00:00 2001
From: Daniel Tschinder <daniel@tschinder.de>
Date: Tue, 26 Mar 2019 00:41:12 -0700
Subject: [PATCH 04/37] Correctly check for-in and for-of loop for invalid
 left-hand side

---
 acorn/src/statement.js | 33 +++++++++-----
 test/tests-harmony.js  | 99 ++++--------------------------------------
 test/tests.js          | 12 ++---
 3 files changed, 38 insertions(+), 106 deletions(-)

diff --git a/acorn/src/statement.js b/acorn/src/statement.js
index 23a903840..cd2b1f75a 100644
--- a/acorn/src/statement.js
+++ b/acorn/src/statement.js
@@ -215,8 +215,7 @@ pp.parseForStatement = function(node) {
     this.next()
     this.parseVar(init, true, kind)
     this.finishNode(init, "VariableDeclaration")
-    if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init.declarations.length === 1 &&
-        !(kind !== "var" && init.declarations[0].init)) {
+    if ((this.type === tt._in || (this.options.ecmaVersion >= 6 && this.isContextual("of"))) && init.declarations.length === 1) {
       if (this.options.ecmaVersion >= 9) {
         if (this.type === tt._in) {
           if (awaitAt > -1) this.unexpected(awaitAt)
@@ -446,21 +445,35 @@ pp.parseFor = function(node, init) {
 // same from parser's perspective.
 
 pp.parseForIn = function(node, init) {
-  let type = this.type === tt._in ? "ForInStatement" : "ForOfStatement"
+  const isForIn = this.type === tt._in
   this.next()
-  if (type === "ForInStatement") {
-    if (init.type === "AssignmentPattern" ||
-      (init.type === "VariableDeclaration" && init.declarations[0].init != null &&
-       (this.strict || init.declarations[0].id.type !== "Identifier")))
-      this.raise(init.start, "Invalid assignment in for-in loop head")
+
+  if (
+    init.type === "VariableDeclaration" &&
+    init.declarations[0].init != null &&
+    (
+      this.options.ecmaVersion < 8 ||
+      this.strict ||
+      init.kind !== "var" ||
+      init.declarations[0].id.type !== "Identifier"
+    )
+  ) {
+    this.raise(
+      init.start,
+      `${
+        isForIn ? "for-in" : "for-of"
+      } loop variable declaration may not have an initializer`
+    )
+  } else if (init.type === "AssignmentPattern") {
+    this.raise(init.start, "Invalid left-hand side in for-loop")
   }
   node.left = init
-  node.right = type === "ForInStatement" ? this.parseExpression() : this.parseMaybeAssign()
+  node.right = isForIn ? this.parseExpression() : this.parseMaybeAssign()
   this.expect(tt.parenR)
   node.body = this.parseStatement("for")
   this.exitScope()
   this.labels.pop()
-  return this.finishNode(node, type)
+  return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement")
 }
 
 // Parse a list of variable declarations.
diff --git a/test/tests-harmony.js b/test/tests-harmony.js
index e37047489..8e9723f50 100644
--- a/test/tests-harmony.js
+++ b/test/tests-harmony.js
@@ -6028,95 +6028,6 @@ test("for (var x of list) process(x);", {
   locations: true
 });
 
-test("for (var x = 42 of list) process(x);", {
-  type: "Program",
-  body: [{
-    type: "ForOfStatement",
-    left: {
-      type: "VariableDeclaration",
-      declarations: [{
-        type: "VariableDeclarator",
-        id: {
-          type: "Identifier",
-          name: "x",
-          loc: {
-            start: {line: 1, column: 9},
-            end: {line: 1, column: 10}
-          }
-        },
-        init: {
-          type: "Literal",
-          value: 42,
-          raw: "42",
-          loc: {
-            start: {line: 1, column: 13},
-            end: {line: 1, column: 15}
-          }
-        },
-        loc: {
-          start: {line: 1, column: 9},
-          end: {line: 1, column: 15}
-        }
-      }],
-      kind: "var",
-      loc: {
-        start: {line: 1, column: 5},
-        end: {line: 1, column: 15}
-      }
-    },
-    right: {
-      type: "Identifier",
-      name: "list",
-      loc: {
-        start: {line: 1, column: 19},
-        end: {line: 1, column: 23}
-      }
-    },
-    body: {
-      type: "ExpressionStatement",
-      expression: {
-        type: "CallExpression",
-        callee: {
-          type: "Identifier",
-          name: "process",
-          loc: {
-            start: {line: 1, column: 25},
-            end: {line: 1, column: 32}
-          }
-        },
-        arguments: [{
-          type: "Identifier",
-          name: "x",
-          loc: {
-            start: {line: 1, column: 33},
-            end: {line: 1, column: 34}
-          }
-        }],
-        loc: {
-          start: {line: 1, column: 25},
-          end: {line: 1, column: 35}
-        }
-      },
-      loc: {
-        start: {line: 1, column: 25},
-        end: {line: 1, column: 36}
-      }
-    },
-    loc: {
-      start: {line: 1, column: 0},
-      end: {line: 1, column: 36}
-    }
-  }],
-  loc: {
-    start: {line: 1, column: 0},
-    end: {line: 1, column: 36}
-  }
-}, {
-  ecmaVersion: 6,
-  ranges: true,
-  locations: true
-});
-
 test("for (let x of list) process(x);", {
   type: "Program",
   body: [{
@@ -13204,9 +13115,15 @@ testFail("\"use strict\"; ({ v: eval } = obj)", "Assigning to eval in strict mod
 
 testFail("\"use strict\"; ({ v: arguments } = obj)", "Assigning to arguments in strict mode (1:20)", {ecmaVersion: 6});
 
-testFail("for (let x = 42 in list) process(x);", "Unexpected token (1:16)", {ecmaVersion: 6});
+testFail("for (let x = 42 in list) process(x);", "for-in loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("for (const x = 42 in list) process(x);", "for-in loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
 
-testFail("for (let x = 42 of list) process(x);", "Unexpected token (1:16)", {ecmaVersion: 6});
+testFail("for (let x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("for (const x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("for (var x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("for (var {x} = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("for (var [x] = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("var x; for (x = 42 of list) process(x);", "Invalid left-hand side in for-loop (1:12)", {ecmaVersion: 6});
 
 testFail("import foo", "Unexpected token (1:10)", {ecmaVersion: 6, sourceType: "module"});
 
diff --git a/test/tests.js b/test/tests.js
index 5c6a0cdd6..799c32c43 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -19689,9 +19689,11 @@ test("for (var x in list) process(x);", {
     }
   }
 });
-testFail("var x; for (x = 0 in list) process(x);", "Invalid assignment in for-in loop head (1:12)", { ecmaVersion: 6 })
-testFail("'use strict'; for (var x = 0 in list) process(x);", "Invalid assignment in for-in loop head (1:19)")
-testFail("for (var [x] = 0 in list) process(x);", "Invalid assignment in for-in loop head (1:5)", { ecmaVersion: 6 })
+testFail("var x; for (x = 0 in list) process(x);", "Invalid left-hand side in for-loop (1:12)", { ecmaVersion: 6 })
+testFail("'use strict'; for (var x = 0 in list) process(x);", "for-in loop variable declaration may not have an initializer (1:19)")
+testFail("for (var [x] = 0 in list) process(x);", "for-in loop variable declaration may not have an initializer (1:5)", { ecmaVersion: 6 })
+testFail("for (var {x} = 0 in list) process(x);", "for-in loop variable declaration may not have an initializer (1:5)", { ecmaVersion: 6 })
+testFail("for (var x = 42 in list) process(x);", "for-in loop variable declaration may not have an initializer (1:5)", { ecmaVersion: 6 })
 
 test("for (var x = 42 in list) process(x);", {
   type: "Program",
@@ -19847,7 +19849,7 @@ test("for (var x = 42 in list) process(x);", {
       column: 36
     }
   }
-});
+}, { ecmaVersion: 8, locations: true });
 
 test("for (var i = function() { return 10 in [] } in list) process(x);", {
   type: "Program",
@@ -20074,7 +20076,7 @@ test("for (var i = function() { return 10 in [] } in list) process(x);", {
       column: 64
     }
   }
-});
+}, { ecmaVersion: 8, locations: true });
 
 test("while (true) { continue; }", {
   type: "Program",

From 07c7202614d601045ac592b79789f11febb7a37c Mon Sep 17 00:00:00 2001
From: Daniel Tschinder <daniel@tschinder.de>
Date: Tue, 26 Mar 2019 02:01:57 -0700
Subject: [PATCH 05/37] Correctly disallow var declarations with init in for-of
 loops

---
 acorn/src/statement.js | 1 +
 test/tests-harmony.js  | 1 +
 2 files changed, 2 insertions(+)

diff --git a/acorn/src/statement.js b/acorn/src/statement.js
index cd2b1f75a..b6e2a69d7 100644
--- a/acorn/src/statement.js
+++ b/acorn/src/statement.js
@@ -452,6 +452,7 @@ pp.parseForIn = function(node, init) {
     init.type === "VariableDeclaration" &&
     init.declarations[0].init != null &&
     (
+      !isForIn ||
       this.options.ecmaVersion < 8 ||
       this.strict ||
       init.kind !== "var" ||
diff --git a/test/tests-harmony.js b/test/tests-harmony.js
index 8e9723f50..a76d5a36f 100644
--- a/test/tests-harmony.js
+++ b/test/tests-harmony.js
@@ -13121,6 +13121,7 @@ testFail("for (const x = 42 in list) process(x);", "for-in loop variable declara
 testFail("for (let x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
 testFail("for (const x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
 testFail("for (var x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
+testFail("for (var x = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 8});
 testFail("for (var {x} = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
 testFail("for (var [x] = 42 of list) process(x);", "for-of loop variable declaration may not have an initializer (1:5)", {ecmaVersion: 6});
 testFail("var x; for (x = 42 of list) process(x);", "Invalid left-hand side in for-loop (1:12)", {ecmaVersion: 6});

From 629c623c0f27564929242e1143926ea02be1ac99 Mon Sep 17 00:00:00 2001
From: Adrian Heine <mail@adrianheine.de>
Date: Wed, 30 Jan 2019 18:19:35 +0100
Subject: [PATCH 06/37] Bump test262

The new tests contain tests for https://github.com/tc39/proposal-hashbang.
---
 bin/run_test262.js | 2 +-
 package.json       | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/bin/run_test262.js b/bin/run_test262.js
index 6fbde08c9..214d923bc 100644
--- a/bin/run_test262.js
+++ b/bin/run_test262.js
@@ -18,7 +18,7 @@ const unsupportedFeatures = [
 ];
 
 run(
-  (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 10}),
+  (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 10, allowHashBang: true}),
   {
     testsDirectory: path.dirname(require.resolve("test262/package.json")),
     skip: test => (test.attrs.features && unsupportedFeatures.some(f => test.attrs.features.includes(f))),
diff --git a/package.json b/package.json
index 75ef9ab14..b71b1ff09 100644
--- a/package.json
+++ b/package.json
@@ -41,8 +41,9 @@
     "eslint-plugin-standard": "^3.0.1",
     "rollup": "^1.7.0",
     "rollup-plugin-buble": "^0.19.0",
-    "test262": "git+https://github.com/tc39/test262.git#e39604fa41b1ad0effdcf586e4d554ff2d8c3eb7",
+    "test262": "git+https://github.com/tc39/test262.git#c822f4c92914333d197191b2b3dec4e923acb4a3",
     "test262-parser-runner": "^0.5.0",
+    "test262-stream": "^1.2.1",
     "unicode-11.0.0": "^0.7.7"
   }
 }

From dfcdbe4014cee1996129a8275bae28380cccd20c Mon Sep 17 00:00:00 2001
From: Adrian Heine <mail@adrianheine.de>
Date: Sat, 30 Mar 2019 23:42:34 +0100
Subject: [PATCH 07/37] Update Unicode data

---
 acorn/src/identifier.js            | 8 ++++----
 acorn/src/unicode-property-data.js | 2 +-
 package.json                       | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/acorn/src/identifier.js b/acorn/src/identifier.js
index 2e6464d98..b00e391de 100644
--- a/acorn/src/identifier.js
+++ b/acorn/src/identifier.js
@@ -27,8 +27,8 @@ export const keywordRelationalOperator = /^in(stanceof)?$/
 // code point above 128.
 // Generated by `bin/generate-identifier-regex.js`.
 
-let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e87\u0e88\u0e8a\u0e8d\u0e94-\u0e97\u0e99-\u0e9f\u0ea1-\u0ea3\u0ea5\u0ea7\u0eaa\u0eab\u0ead-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf1\u1cf5\u1cf6\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7b9\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab65\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
-let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf2-\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
+let nonASCIIidentifierStartChars = "aab5bac0-d6d8-f6f8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7c6\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab67\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
+let nonASCIIidentifierChars = "\u200c\u200db7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
 
 const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
 const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
@@ -42,10 +42,10 @@ nonASCIIidentifierStartChars = nonASCIIidentifierChars = null
 // generated by bin/generate-identifier-regex.js
 
 // eslint-disable-next-line comma-spacing
-const astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,190,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,54,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,86,26,230,43,117,63,32,0,257,0,11,39,8,0,22,0,12,39,3,3,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,68,12,0,67,12,65,1,31,6129,15,754,9486,286,82,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,4149,196,60,67,1213,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541]
+const astralIdentifierStartCodes = [0,11,2,25,2,18,2,1,2,14,3,13,35,122,70,52,268,28,4,48,48,31,14,29,6,37,11,29,3,35,5,7,2,4,43,157,19,35,5,35,5,39,9,51,157,310,10,21,11,7,153,5,3,0,2,43,2,1,4,0,3,22,11,22,10,30,66,18,2,1,11,21,11,25,71,55,7,1,65,0,16,3,2,2,2,28,43,28,4,28,36,7,2,27,28,53,11,21,11,18,14,17,111,72,56,50,14,50,14,35,477,28,11,0,9,21,155,22,13,52,76,44,33,24,27,35,30,0,12,34,4,0,13,47,15,3,22,0,2,0,36,17,2,24,85,6,2,0,2,3,2,14,2,9,8,46,39,7,3,1,3,21,2,6,2,1,2,4,4,0,19,0,13,4,159,52,19,3,21,0,33,47,21,1,2,0,185,46,42,3,37,47,21,0,60,42,14,0,72,26,230,43,117,63,32,0,161,7,3,38,17,0,2,0,29,0,11,39,8,0,22,0,12,45,20,0,35,56,264,8,2,36,18,0,50,29,113,6,2,1,2,37,22,0,26,5,2,1,2,31,15,0,328,18,270,921,103,110,18,195,2749,1070,4050,582,8634,568,8,30,114,29,19,47,17,3,32,20,6,18,689,63,129,74,6,0,67,12,65,1,2,0,29,6135,9,754,9486,286,50,2,18,3,9,395,2309,106,6,12,4,8,8,9,5991,84,2,70,2,1,3,0,3,1,3,3,2,11,2,0,2,6,2,64,2,3,3,7,2,6,2,27,2,3,2,4,2,0,4,6,2,339,3,24,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,30,2,24,2,7,2357,44,11,6,17,0,370,43,1301,196,60,67,8,0,1205,3,2,26,2,1,2,0,3,0,2,9,2,3,2,0,2,0,7,0,5,0,2,0,2,0,2,2,2,1,2,0,3,0,2,0,2,0,2,0,2,0,2,1,2,0,3,3,2,6,2,3,2,3,2,0,2,9,2,16,6,2,2,4,2,16,4421,42710,42,4148,12,221,3,5761,15,7472,3104,541]
 
 // eslint-disable-next-line comma-spacing
-const astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,280,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1016,45,17,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,2214,6,110,6,6,9,792487,239]
+const astralIdentifierCodes = [509,0,227,0,150,4,294,9,1368,2,2,1,6,3,41,2,5,0,166,1,574,3,9,9,525,10,176,2,54,14,32,9,16,3,46,10,54,9,7,2,37,13,2,9,6,1,45,0,13,2,49,13,9,3,4,9,83,11,7,0,161,11,6,9,7,3,56,1,2,6,3,1,3,2,10,0,11,1,3,6,4,4,193,17,10,9,5,0,82,19,13,9,214,6,3,8,28,1,83,16,16,9,82,12,9,9,84,14,5,9,243,14,166,9,232,6,3,6,4,0,29,9,41,6,2,3,9,0,10,10,47,15,406,7,2,7,17,9,57,21,2,13,123,5,4,0,2,1,2,6,2,0,9,9,49,4,2,1,2,4,9,9,330,3,19306,9,135,4,60,6,26,9,1014,0,2,54,8,3,19723,1,5319,4,4,5,9,7,3,6,31,3,149,2,1418,49,513,54,5,49,9,0,15,0,23,4,2,14,1361,6,2,16,3,6,2,1,2,4,262,6,10,9,419,13,1495,6,110,6,6,9,792487,239]
 
 // This has a complexity linear to the value of the code. The
 // assumption is that looking up astral identifier characters is
diff --git a/acorn/src/unicode-property-data.js b/acorn/src/unicode-property-data.js
index a2c125842..4e060ed9e 100644
--- a/acorn/src/unicode-property-data.js
+++ b/acorn/src/unicode-property-data.js
@@ -18,7 +18,7 @@ const unicodeGeneralCategoryValues = "Cased_Letter LC Close_Punctuation Pe Conne
 const ecma9ScriptValues = "Adlam Adlm Ahom Ahom Anatolian_Hieroglyphs Hluw Arabic Arab Armenian Armn Avestan Avst Balinese Bali Bamum Bamu Bassa_Vah Bass Batak Batk Bengali Beng Bhaiksuki Bhks Bopomofo Bopo Brahmi Brah Braille Brai Buginese Bugi Buhid Buhd Canadian_Aboriginal Cans Carian Cari Caucasian_Albanian Aghb Chakma Cakm Cham Cham Cherokee Cher Common Zyyy Coptic Copt Qaac Cuneiform Xsux Cypriot Cprt Cyrillic Cyrl Deseret Dsrt Devanagari Deva Duployan Dupl Egyptian_Hieroglyphs Egyp Elbasan Elba Ethiopic Ethi Georgian Geor Glagolitic Glag Gothic Goth Grantha Gran Greek Grek Gujarati Gujr Gurmukhi Guru Han Hani Hangul Hang Hanunoo Hano Hatran Hatr Hebrew Hebr Hiragana Hira Imperial_Aramaic Armi Inherited Zinh Qaai Inscriptional_Pahlavi Phli Inscriptional_Parthian Prti Javanese Java Kaithi Kthi Kannada Knda Katakana Kana Kayah_Li Kali Kharoshthi Khar Khmer Khmr Khojki Khoj Khudawadi Sind Lao Laoo Latin Latn Lepcha Lepc Limbu Limb Linear_A Lina Linear_B Linb Lisu Lisu Lycian Lyci Lydian Lydi Mahajani Mahj Malayalam Mlym Mandaic Mand Manichaean Mani Marchen Marc Masaram_Gondi Gonm Meetei_Mayek Mtei Mende_Kikakui Mend Meroitic_Cursive Merc Meroitic_Hieroglyphs Mero Miao Plrd Modi Modi Mongolian Mong Mro Mroo Multani Mult Myanmar Mymr Nabataean Nbat New_Tai_Lue Talu Newa Newa Nko Nkoo Nushu Nshu Ogham Ogam Ol_Chiki Olck Old_Hungarian Hung Old_Italic Ital Old_North_Arabian Narb Old_Permic Perm Old_Persian Xpeo Old_South_Arabian Sarb Old_Turkic Orkh Oriya Orya Osage Osge Osmanya Osma Pahawh_Hmong Hmng Palmyrene Palm Pau_Cin_Hau Pauc Phags_Pa Phag Phoenician Phnx Psalter_Pahlavi Phlp Rejang Rjng Runic Runr Samaritan Samr Saurashtra Saur Sharada Shrd Shavian Shaw Siddham Sidd SignWriting Sgnw Sinhala Sinh Sora_Sompeng Sora Soyombo Soyo Sundanese Sund Syloti_Nagri Sylo Syriac Syrc Tagalog Tglg Tagbanwa Tagb Tai_Le Tale Tai_Tham Lana Tai_Viet Tavt Takri Takr Tamil Taml Tangut Tang Telugu Telu Thaana Thaa Thai Thai Tibetan Tibt Tifinagh Tfng Tirhuta Tirh Ugaritic Ugar Vai Vaii Warang_Citi Wara Yi Yiii Zanabazar_Square Zanb"
 const unicodeScriptValues = {
   9: ecma9ScriptValues,
-  10: ecma9ScriptValues + " Dogra Dogr Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Old_Sogdian Sogo Sogdian Sogd"
+  10: ecma9ScriptValues + " Dogra Dogr Elymaic Elym Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Nandinagari Nand Nyiakeng_Puachue_Hmong Hmnp Old_Sogdian Sogo Sogdian Sogd Wancho Wcho"
 }
 
 const data = {}
diff --git a/package.json b/package.json
index b71b1ff09..aa22c2a44 100644
--- a/package.json
+++ b/package.json
@@ -41,9 +41,9 @@
     "eslint-plugin-standard": "^3.0.1",
     "rollup": "^1.7.0",
     "rollup-plugin-buble": "^0.19.0",
-    "test262": "git+https://github.com/tc39/test262.git#c822f4c92914333d197191b2b3dec4e923acb4a3",
+    "test262": "git+https://github.com/tc39/test262.git#de567d3aa5de4eaa11e00131d26b9fe77997dfb0",
     "test262-parser-runner": "^0.5.0",
     "test262-stream": "^1.2.1",
-    "unicode-11.0.0": "^0.7.7"
+    "unicode-12.0.0": "^0.7.9"
   }
 }

From 073a12c8285353866dfd74de5d88c543bd3ae20d Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Wed, 1 May 2019 17:16:45 +0200
Subject: [PATCH 08/37] Include input file name in error messages output by
 bin/acorn

Issue #827
---
 acorn/src/bin/acorn.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/src/bin/acorn.js b/acorn/src/bin/acorn.js
index 2aa4139b0..9cb4ef5e6 100644
--- a/acorn/src/bin/acorn.js
+++ b/acorn/src/bin/acorn.js
@@ -46,7 +46,7 @@ function run(code) {
       } while (token.type !== acorn.tokTypes.eof)
     }
   } catch (e) {
-    console.error(e.message)
+    console.error(infile ? e.message.replace(/\(\d+:\d+\)$/, m => m.slice(0, 1) + infile + " " + m.slice(1)) : e.message)
     process.exit(1)
   }
   if (!silent) console.log(JSON.stringify(result, null, compact ? null : 2))

From 275e846888003238a7403885d788e5f208eafadd Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Mon, 13 May 2019 16:23:23 +0200
Subject: [PATCH 09/37] Don't include file name in error messages when it is a
 single dash

Issue #827
---
 acorn/src/bin/acorn.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/src/bin/acorn.js b/acorn/src/bin/acorn.js
index 9cb4ef5e6..81cd69eca 100644
--- a/acorn/src/bin/acorn.js
+++ b/acorn/src/bin/acorn.js
@@ -46,7 +46,7 @@ function run(code) {
       } while (token.type !== acorn.tokTypes.eof)
     }
   } catch (e) {
-    console.error(infile ? e.message.replace(/\(\d+:\d+\)$/, m => m.slice(0, 1) + infile + " " + m.slice(1)) : e.message)
+    console.error(infile && infile != "-" ? e.message.replace(/\(\d+:\d+\)$/, m => m.slice(0, 1) + infile + " " + m.slice(1)) : e.message)
     process.exit(1)
   }
   if (!silent) console.log(JSON.stringify(result, null, compact ? null : 2))

From 7ae2fa99a7c7a6fb889449f260954cfd4c8b6cac Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Mon, 13 May 2019 16:26:59 +0200
Subject: [PATCH 10/37] Please linter

---
 acorn/src/bin/acorn.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/src/bin/acorn.js b/acorn/src/bin/acorn.js
index 81cd69eca..9a6712c87 100644
--- a/acorn/src/bin/acorn.js
+++ b/acorn/src/bin/acorn.js
@@ -46,7 +46,7 @@ function run(code) {
       } while (token.type !== acorn.tokTypes.eof)
     }
   } catch (e) {
-    console.error(infile && infile != "-" ? e.message.replace(/\(\d+:\d+\)$/, m => m.slice(0, 1) + infile + " " + m.slice(1)) : e.message)
+    console.error(infile && infile !== "-" ? e.message.replace(/\(\d+:\d+\)$/, m => m.slice(0, 1) + infile + " " + m.slice(1)) : e.message)
     process.exit(1)
   }
   if (!silent) console.log(JSON.stringify(result, null, compact ? null : 2))

From 09fe6e471ddd2be8f2bc1297e4ec8ed9507e2c52 Mon Sep 17 00:00:00 2001
From: Adrian Heine <mail@adrianheine.de>
Date: Tue, 4 Jun 2019 23:42:04 +0200
Subject: [PATCH 11/37] Add support for BigInt (stage 4)

---
 acorn-loose/src/expression.js |   1 +
 acorn/src/.eslintrc           |   3 +-
 acorn/src/expression.js       |   1 +
 acorn/src/tokenize.js         |  13 ++-
 bin/run_test262.js            |   3 +-
 test/driver.js                |   2 +-
 test/run.js                   |   1 +
 test/tests-bigint.js          | 197 ++++++++++++++++++++++++++++++++++
 8 files changed, 216 insertions(+), 5 deletions(-)
 create mode 100644 test/tests-bigint.js

diff --git a/acorn-loose/src/expression.js b/acorn-loose/src/expression.js
index d5dba4e99..4debff52a 100644
--- a/acorn-loose/src/expression.js
+++ b/acorn-loose/src/expression.js
@@ -244,6 +244,7 @@ lp.parseExprAtom = function() {
     node = this.startNode()
     node.value = this.tok.value
     node.raw = this.input.slice(this.tok.start, this.tok.end)
+    if (this.tok.type === tt.num && node.raw.charCodeAt(node.raw.length - 1) === 110) node.bigint = node.raw.slice(0, -1)
     this.next()
     return this.finishNode(node, "Literal")
 
diff --git a/acorn/src/.eslintrc b/acorn/src/.eslintrc
index ea6fbdfb6..181c1b369 100644
--- a/acorn/src/.eslintrc
+++ b/acorn/src/.eslintrc
@@ -25,7 +25,8 @@
         "space-before-function-paren": ["error", "never"]
     },
     "globals": {
-        "Packages": false
+        "Packages": false,
+        "BigInt": false
     },
     "plugins": [
         "import"
diff --git a/acorn/src/expression.js b/acorn/src/expression.js
index 97c3fe6b9..0bbeb98c0 100644
--- a/acorn/src/expression.js
+++ b/acorn/src/expression.js
@@ -418,6 +418,7 @@ pp.parseLiteral = function(value) {
   let node = this.startNode()
   node.value = value
   node.raw = this.input.slice(this.start, this.end)
+  if (node.raw.charCodeAt(node.raw.length - 1) === 110) node.bigint = node.raw.slice(0, -1)
   this.next()
   return this.finishNode(node, "Literal")
 }
diff --git a/acorn/src/tokenize.js b/acorn/src/tokenize.js
index acb9bf65f..f9f6b2f6f 100644
--- a/acorn/src/tokenize.js
+++ b/acorn/src/tokenize.js
@@ -427,10 +427,14 @@ pp.readInt = function(radix, len) {
 }
 
 pp.readRadixNumber = function(radix) {
+  let start = this.pos
   this.pos += 2 // 0x
   let val = this.readInt(radix)
   if (val == null) this.raise(this.start + 2, "Expected number in radix " + radix)
-  if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
+  if (this.options.ecmaVersion >= 11 && this.input.charCodeAt(this.pos) === 110) {
+    val = typeof BigInt !== "undefined" ? BigInt(this.input.slice(start, this.pos)) : null
+    ++this.pos
+  } else if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
   return this.finishToken(tt.num, val)
 }
 
@@ -443,6 +447,13 @@ pp.readNumber = function(startsWithDot) {
   if (octal && this.strict) this.raise(start, "Invalid number")
   if (octal && /[89]/.test(this.input.slice(start, this.pos))) octal = false
   let next = this.input.charCodeAt(this.pos)
+  if (!octal && !startsWithDot && this.options.ecmaVersion >= 11 && next === 110) {
+    let str = this.input.slice(start, this.pos)
+    let val = typeof BigInt !== "undefined" ? BigInt(str) : null
+    ++this.pos
+    if (isIdentifierStart(this.fullCharCodeAtPos())) this.raise(this.pos, "Identifier directly after number")
+    return this.finishToken(tt.num, val)
+  }
   if (next === 46 && !octal) { // '.'
     ++this.pos
     this.readInt(10)
diff --git a/bin/run_test262.js b/bin/run_test262.js
index 214d923bc..27c60c742 100644
--- a/bin/run_test262.js
+++ b/bin/run_test262.js
@@ -4,7 +4,6 @@ const run = require("test262-parser-runner")
 const parse = require("../acorn").parse
 
 const unsupportedFeatures = [
-  "BigInt",
   "class-fields-private",
   "class-fields-public",
   "class-methods-private",
@@ -18,7 +17,7 @@ const unsupportedFeatures = [
 ];
 
 run(
-  (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 10, allowHashBang: true}),
+  (content, {sourceType}) => parse(content, {sourceType, ecmaVersion: 11, allowHashBang: true}),
   {
     testsDirectory: path.dirname(require.resolve("test262/package.json")),
     skip: test => (test.attrs.features && unsupportedFeatures.some(f => test.attrs.features.includes(f))),
diff --git a/test/driver.js b/test/driver.js
index dc8fc6f65..b05cbb17a 100644
--- a/test/driver.js
+++ b/test/driver.js
@@ -61,7 +61,7 @@ exports.runTests = function(config, callback) {
   }
 };
 
-function ppJSON(v) { return v instanceof RegExp ? v.toString() : JSON.stringify(v, null, 2); }
+function ppJSON(v) { return v instanceof RegExp ? v.toString() : (typeof v == "bigint" ? v.toString() : JSON.stringify(v, null, 2)); }
 function addPath(str, pt) {
   if (str.charAt(str.length-1) == ")")
     return str.slice(0, str.length-1) + "/" + pt + ")";
diff --git a/test/run.js b/test/run.js
index 7fed58964..068948fdc 100644
--- a/test/run.js
+++ b/test/run.js
@@ -14,6 +14,7 @@
   require("./tests-regexp-2018.js");
   require("./tests-json-superset.js");
   require("./tests-optional-catch-binding.js");
+  require("./tests-bigint.js");
   var acorn = require("../acorn")
   var acorn_loose = require("../acorn-loose")
 
diff --git a/test/tests-bigint.js b/test/tests-bigint.js
new file mode 100644
index 000000000..bb2d9d53e
--- /dev/null
+++ b/test/tests-bigint.js
@@ -0,0 +1,197 @@
+if (typeof exports != "undefined") {
+  var test = require("./driver.js").test;
+  var testFail = require("./driver.js").testFail;
+}
+
+const newBigIntLiteral = (start, stringValue) => ({
+  start: start,
+  type: "Literal",
+  end: start + stringValue.length + 1,
+  value: typeof BigInt !== "undefined" ? BigInt(stringValue) : null,
+  raw: `${stringValue}n`,
+  bigint: stringValue
+})
+
+const digits = [
+  {d: "0", ast: start => newBigIntLiteral(start, "0")},
+  {d: "2", ast: start => newBigIntLiteral(start, "2")},
+  {d: "0x2", ast: start => newBigIntLiteral(start, "0x2")},
+  {d: "0o2", ast: start => newBigIntLiteral(start, "0o2")},
+  {d: "0b10", ast: start => newBigIntLiteral(start, "0b10")},
+  {d: "-0xbf2ed51ff75d380fd3be813ec6185780", ast: start => ({
+    start: start,
+    type: "UnaryExpression",
+    end: start + 36,
+    operator: "-",
+    prefix: true,
+    argument: newBigIntLiteral(start + 1, "0xbf2ed51ff75d380fd3be813ec6185780")
+  })},
+  {d: "02", error: start => `Identifier directly after number (1:${start + 2})`},
+  {d: "2e2", error: start => `Identifier directly after number (1:${start + 3})`},
+  {d: "2.4", error: start => `Identifier directly after number (1:${start + 3})`},
+  {d: ".4", error: start => `Identifier directly after number (1:${start + 2})`},
+]
+const statements = [
+  {s: "let i = %s", ast: content => ({
+    start: 0,
+    type: "VariableDeclaration",
+    end: content.end,
+    kind: "let",
+    declarations: [{
+      start: 4,
+      type: "VariableDeclarator",
+      end: content.end,
+      id: {
+        start: 4,
+        type: "Identifier",
+        end: 5,
+        name: "i"
+      },
+      init: content
+    }]
+  })},
+
+  {s: "i = %s", ast: content => ({
+    start: 0,
+    type: "ExpressionStatement",
+    end: content.end,
+    expression: {
+      start: 0,
+      type: "AssignmentExpression",
+      end: content.end,
+      operator: "=",
+      left: {
+        start: 0,
+        type: "Identifier",
+        end: 1,
+        name: "i"
+      },
+      right: content
+    }
+  })},
+
+  {s: "((i = %s) => {})", ast: content => ({
+    start: 0,
+    type: "ExpressionStatement",
+    end: content.end + 8,
+    expression: {
+      start: 1,
+      type: "ArrowFunctionExpression",
+      end: content.end + 7,
+      id: null,
+      generator: false,
+      expression: false,
+      async: false,
+      params: [
+        {
+          start: 2,
+          type: "AssignmentPattern",
+          end: content.end,
+          left: {
+            start: 2,
+            type: "Identifier",
+            end: 3,
+            name: "i"
+          },
+          right: content
+        }
+      ],
+      body: {
+        start: content.end + 5,
+        type: "BlockStatement",
+        end: content.end + 7,
+        body: []
+      }
+    }
+  })},
+
+  {s: "for (let i = 0n; i < %s;++i) {}", ast: content => ({
+    start: 0,
+    type: "ForStatement",
+    end: content.end + 8,
+    init: {
+      start: 5,
+      type: "VariableDeclaration",
+      end: 15,
+      declarations: [
+        {
+          start: 9,
+          type: "VariableDeclarator",
+          end: 15,
+          id: {
+            start: 9,
+            type: "Identifier",
+            end: 10,
+            name: "i"
+          },
+          init: newBigIntLiteral(13, "0")
+        }
+      ],
+      kind: "let"
+    },
+    test: {
+      start: 17,
+      type: "BinaryExpression",
+      end: content.end,
+      left: {
+        start: 17,
+        type: "Identifier",
+        start: 17,
+        end: 18,
+        name: "i"
+      },
+      operator: "<",
+      right: content
+    },
+    update: {
+      start: content.end + 1,
+      type: "UpdateExpression",
+      end: content.end + 4,
+      operator: "++",
+      prefix: true,
+      argument: {
+        start: content.end + 3,
+        type: "Identifier",
+        end: content.end + 4,
+        name: "i"
+      }
+    },
+    body: {
+      start: content.end + 6,
+      type: "BlockStatement",
+      end: content.end + 8,
+      body: []
+    }
+  })},
+
+  {s: "i + %s", ast: content => ({
+    start: 0,
+    type: "ExpressionStatement",
+    end: content.end,
+    expression: {
+      start: 0,
+      type: "BinaryExpression",
+      end: content.end,
+      left: {
+        start: 0,
+        type: "Identifier",
+        start: 0,
+        end: 1,
+        name: "i"
+      },
+      operator: "+",
+      right: content
+    }
+  })}
+]
+statements.forEach(statement => {
+  const start = statement.s.indexOf("%s")
+  digits.forEach(d => {
+    (d.error ? testFail : test)(
+      statement.s.replace("%s", `${d.d}n`),
+      d.error ? d.error(start) : { type: "Program", body: [
+        statement.ast(d.ast(start))
+      ]}, { ecmaVersion: 11 }
+    )
+  })
+})

From 172309446319efd9302d0bb6effc2ce7e9189f7b Mon Sep 17 00:00:00 2001
From: Adrian Heine <mail@adrianheine.de>
Date: Wed, 5 Jun 2019 11:57:09 +0200
Subject: [PATCH 12/37] Update node.js versions in travis

---
 .travis.yml | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 9d2bba003..731ec895e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,10 +4,11 @@ cache: npm
 matrix:
   include:
   - node_js: '6'
-  - node_js: '7'
-  - node_js: '8'
   - node_js: '8'
+  - node_js: '10'
+  - node_js: '10'
     env: TEST_SUITE=test262
+  - node_js: '12'
 script: >
   if [ "$TEST_SUITE" != "test262" ]; then
     npm test

From 0b5f7a7357c6daaa94e293a8f51ec385b2005849 Mon Sep 17 00:00:00 2001
From: Kai Cataldo <kaicataldo@gmail.com>
Date: Wed, 19 Jun 2019 19:07:12 +0000
Subject: [PATCH 13/37] Disallow let as identifier name in patterns

---
 acorn/src/lval.js      |  4 +++-
 acorn/src/statement.js |  3 ---
 test/tests-harmony.js  | 20 ++++++++++++++++++--
 3 files changed, 21 insertions(+), 6 deletions(-)

diff --git a/acorn/src/lval.js b/acorn/src/lval.js
index dbd220f93..8ad4b2639 100644
--- a/acorn/src/lval.js
+++ b/acorn/src/lval.js
@@ -1,7 +1,7 @@
 import {types as tt} from "./tokentype"
 import {Parser} from "./state"
 import {has} from "./util"
-import {BIND_NONE, BIND_OUTSIDE} from "./scopeflags"
+import {BIND_NONE, BIND_OUTSIDE, BIND_LEXICAL} from "./scopeflags"
 
 const pp = Parser.prototype
 
@@ -189,6 +189,8 @@ pp.parseMaybeDefault = function(startPos, startLoc, left) {
 pp.checkLVal = function(expr, bindingType = BIND_NONE, checkClashes) {
   switch (expr.type) {
   case "Identifier":
+    if (bindingType === BIND_LEXICAL && expr.name === "let")
+      this.raiseRecoverable(expr.start, "let is disallowed as a lexically bound name")
     if (this.strict && this.reservedWordsStrictBind.test(expr.name))
       this.raiseRecoverable(expr.start, (bindingType ? "Binding " : "Assigning to ") + expr.name + " in strict mode")
     if (checkClashes) {
diff --git a/acorn/src/statement.js b/acorn/src/statement.js
index b6e2a69d7..6bc47c3fc 100644
--- a/acorn/src/statement.js
+++ b/acorn/src/statement.js
@@ -501,9 +501,6 @@ pp.parseVar = function(node, isFor, kind) {
 }
 
 pp.parseVarId = function(decl, kind) {
-  if ((kind === "const" || kind === "let") && this.isContextual("let")) {
-    this.raiseRecoverable(this.start, "let is disallowed as a lexically bound name")
-  }
   decl.id = this.parseBindingAtom()
   this.checkLVal(decl.id, kind === "var" ? BIND_VAR : BIND_LEXICAL, false)
 }
diff --git a/test/tests-harmony.js b/test/tests-harmony.js
index a76d5a36f..a37495efe 100644
--- a/test/tests-harmony.js
+++ b/test/tests-harmony.js
@@ -13409,9 +13409,25 @@ testFail("let let", "let is disallowed as a lexically bound name (1:4)", {ecmaVe
 
 testFail("const let", "let is disallowed as a lexically bound name (1:6)", {ecmaVersion: 6})
 
-testFail("'use strict'; let let", "let is disallowed as a lexically bound name (1:18)", {ecmaVersion: 6})
+testFail("let { let } = {};", "let is disallowed as a lexically bound name (1:6)", {ecmaVersion: 6})
 
-testFail("'use strict'; const let", "let is disallowed as a lexically bound name (1:20)", {ecmaVersion: 6})
+testFail("const { let } = {};", "let is disallowed as a lexically bound name (1:8)", {ecmaVersion: 6})
+
+testFail("let [let] = [];", "let is disallowed as a lexically bound name (1:5)", {ecmaVersion: 6})
+
+testFail("const [let] = [];", "let is disallowed as a lexically bound name (1:7)", {ecmaVersion: 6})
+
+testFail("'use strict'; let let", "The keyword 'let' is reserved (1:18)", {ecmaVersion: 6})
+
+testFail("'use strict'; const let", "The keyword 'let' is reserved (1:20)", {ecmaVersion: 6})
+
+testFail("'use strict'; let { let } = {};", "The keyword 'let' is reserved (1:20)", {ecmaVersion: 6})
+
+testFail("'use strict'; const { let } = {};", "The keyword 'let' is reserved (1:22)", {ecmaVersion: 6})
+
+testFail("'use strict'; let [let] = [];", "The keyword 'let' is reserved (1:19)", {ecmaVersion: 6})
+
+testFail("'use strict'; const [let] = [];", "The keyword 'let' is reserved (1:21)", {ecmaVersion: 6})
 
 test("if (1) let\n{}", {}, {ecmaVersion: 6})
 

From 20573f3657c7bbdc262237c96b302a3e268ed531 Mon Sep 17 00:00:00 2001
From: Kai Cataldo <kaicataldo@gmail.com>
Date: Wed, 19 Jun 2019 19:20:19 +0000
Subject: [PATCH 14/37] Group strict mode let keyword tests

---
 test/tests-harmony.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/test/tests-harmony.js b/test/tests-harmony.js
index a37495efe..ade46a220 100644
--- a/test/tests-harmony.js
+++ b/test/tests-harmony.js
@@ -13403,7 +13403,6 @@ test("var let = 1", {
   ]
 }, {ecmaVersion: 6})
 
-testFail("'use strict'; let + 1", "The keyword 'let' is reserved (1:14)", {ecmaVersion: 6})
 
 testFail("let let", "let is disallowed as a lexically bound name (1:4)", {ecmaVersion: 6})
 
@@ -13417,6 +13416,8 @@ testFail("let [let] = [];", "let is disallowed as a lexically bound name (1:5)",
 
 testFail("const [let] = [];", "let is disallowed as a lexically bound name (1:7)", {ecmaVersion: 6})
 
+testFail("'use strict'; let + 1", "The keyword 'let' is reserved (1:14)", {ecmaVersion: 6})
+
 testFail("'use strict'; let let", "The keyword 'let' is reserved (1:18)", {ecmaVersion: 6})
 
 testFail("'use strict'; const let", "The keyword 'let' is reserved (1:20)", {ecmaVersion: 6})

From a53faf52aa79c8aa87e276ee8dc941ac0cc20c94 Mon Sep 17 00:00:00 2001
From: Kai Cataldo <kaicataldo@gmail.com>
Date: Wed, 19 Jun 2019 19:22:04 +0000
Subject: [PATCH 15/37] Add .npmrc to prevent lockfile from being generated

---
 .npmrc | 1 +
 1 file changed, 1 insertion(+)
 create mode 100644 .npmrc

diff --git a/.npmrc b/.npmrc
new file mode 100644
index 000000000..77155769c
--- /dev/null
+++ b/.npmrc
@@ -0,0 +1 @@
+package-lock = false
\ No newline at end of file

From 211e4c90d3fd8147a246a7c2c13a1be9fcc85a65 Mon Sep 17 00:00:00 2001
From: dnalborczyk <dnalborczyk@gmail.com>
Date: Sat, 22 Jun 2019 09:35:44 -0400
Subject: [PATCH 16/37] Remove async iterators from stage 3 proposals section

---
 acorn/README.md | 1 -
 1 file changed, 1 deletion(-)

diff --git a/acorn/README.md b/acorn/README.md
index 17c639844..3e4424f2c 100644
--- a/acorn/README.md
+++ b/acorn/README.md
@@ -260,7 +260,6 @@ The utility spits out the syntax tree as JSON data.
 Plugins for ECMAScript proposals:
  
  - [`acorn-stage3`](https://github.com/acornjs/acorn-stage3): Parse most stage 3 proposals, bundling:
-   - [`acorn-async-iteration`](https://github.com/acornjs/acorn-async-iteration): Parse [async iteration proposal](https://github.com/tc39/proposal-async-iteration)
    - [`acorn-bigint`](https://github.com/acornjs/acorn-bigint): Parse [BigInt proposal](https://github.com/tc39/proposal-bigint)
    - [`acorn-class-fields`](https://github.com/acornjs/acorn-class-fields): Parse [class fields proposal](https://github.com/tc39/proposal-class-fields)
    - [`acorn-dynamic-import`](https://github.com/kesne/acorn-dynamic-import): Parse [import() proposal](https://github.com/tc39/proposal-dynamic-import)

From e7c7102c095834a3194db970ef09f9e7517a73f5 Mon Sep 17 00:00:00 2001
From: Jordan Gensler <jgensler@netflix.com>
Date: Tue, 4 Jun 2019 12:53:45 -0700
Subject: [PATCH 17/37] Add support for dynamic import

---
 acorn-loose/src/expression.js |  13 ++++
 acorn-loose/src/statement.js  |   6 ++
 acorn/src/expression.js       |  33 ++++++++-
 acorn/src/statement.js        |   8 +++
 acorn/src/tokentype.js        |   2 +-
 bin/run_test262.js            |   1 -
 test/run.js                   |   1 +
 test/tests-dynamic-import.js  | 128 ++++++++++++++++++++++++++++++++++
 8 files changed, 188 insertions(+), 4 deletions(-)
 create mode 100644 test/tests-dynamic-import.js

diff --git a/acorn-loose/src/expression.js b/acorn-loose/src/expression.js
index 4debff52a..fe338d960 100644
--- a/acorn-loose/src/expression.js
+++ b/acorn-loose/src/expression.js
@@ -296,11 +296,24 @@ lp.parseExprAtom = function() {
   case tt.backQuote:
     return this.parseTemplate()
 
+  case tt._import:
+    if (this.options.ecmaVersion > 10) {
+      return this.parseDynamicImport()
+    } else {
+      return this.dummyIdent()
+    }
+
   default:
     return this.dummyIdent()
   }
 }
 
+lp.parseDynamicImport = function() {
+  const node = this.startNode()
+  this.next()
+  return this.finishNode(node, "Import")
+}
+
 lp.parseNew = function() {
   let node = this.startNode(), startIndent = this.curIndent, line = this.curLineStart
   let meta = this.parseIdent(true)
diff --git a/acorn-loose/src/statement.js b/acorn-loose/src/statement.js
index c3701f7e0..ac208424e 100644
--- a/acorn-loose/src/statement.js
+++ b/acorn-loose/src/statement.js
@@ -178,6 +178,12 @@ lp.parseStatement = function() {
     return this.parseClass(true)
 
   case tt._import:
+    if (this.options.ecmaVersion > 10 && this.lookAhead(1).type === tt.parenL) {
+      node.expression = this.parseExpression()
+      this.semicolon()
+      return this.finishNode(node, "ExpressionStatement")
+    }
+
     return this.parseImport()
 
   case tt._export:
diff --git a/acorn/src/expression.js b/acorn/src/expression.js
index 0bbeb98c0..7a4aed93b 100644
--- a/acorn/src/expression.js
+++ b/acorn/src/expression.js
@@ -281,7 +281,7 @@ pp.parseSubscript = function(base, startPos, startLoc, noCalls, maybeAsyncArrow)
     this.yieldPos = 0
     this.awaitPos = 0
     this.awaitIdentPos = 0
-    let exprList = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false, refDestructuringErrors)
+    let exprList = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8 && base.type !== "Import", false, refDestructuringErrors)
     if (maybeAsyncArrow && !this.canInsertSemicolon() && this.eat(tt.arrow)) {
       this.checkPatternErrors(refDestructuringErrors, false)
       this.checkYieldAwaitInDefaultParams()
@@ -299,6 +299,16 @@ pp.parseSubscript = function(base, startPos, startLoc, noCalls, maybeAsyncArrow)
     let node = this.startNodeAt(startPos, startLoc)
     node.callee = base
     node.arguments = exprList
+    if (node.callee.type === "Import") {
+      if (node.arguments.length !== 1) {
+        this.raise(node.start, "import() requires exactly one argument")
+      }
+
+      const importArg = node.arguments[0]
+      if (importArg && importArg.type === "SpreadElement") {
+        this.raise(importArg.start, "... is not allowed in import()")
+      }
+    }
     base = this.finishNode(node, "CallExpression")
   } else if (this.type === tt.backQuote) {
     let node = this.startNodeAt(startPos, startLoc)
@@ -409,11 +419,27 @@ pp.parseExprAtom = function(refDestructuringErrors) {
   case tt.backQuote:
     return this.parseTemplate()
 
+  case tt._import:
+    if (this.options.ecmaVersion > 10) {
+      return this.parseDynamicImport()
+    } else {
+      return this.unexpected()
+    }
+
   default:
     this.unexpected()
   }
 }
 
+pp.parseDynamicImport = function() {
+  const node = this.startNode()
+  this.next()
+  if (this.type !== tt.parenL) {
+    this.unexpected()
+  }
+  return this.finishNode(node, "Import")
+}
+
 pp.parseLiteral = function(value) {
   let node = this.startNode()
   node.value = value
@@ -523,7 +549,10 @@ pp.parseNew = function() {
   }
   let startPos = this.start, startLoc = this.startLoc
   node.callee = this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true)
-  if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8, false)
+  if (this.options.ecmaVersion > 10 && node.callee.type === "Import") {
+    this.raise(node.callee.start, "Cannot use new with import(...)")
+  }
+  if (this.eat(tt.parenL)) node.arguments = this.parseExprList(tt.parenR, this.options.ecmaVersion >= 8 && node.callee.type !== "Import", false)
   else node.arguments = empty
   return this.finishNode(node, "NewExpression")
 }
diff --git a/acorn/src/statement.js b/acorn/src/statement.js
index 6bc47c3fc..d423b5910 100644
--- a/acorn/src/statement.js
+++ b/acorn/src/statement.js
@@ -120,6 +120,14 @@ pp.parseStatement = function(context, topLevel, exports) {
   case tt.semi: return this.parseEmptyStatement(node)
   case tt._export:
   case tt._import:
+    if (this.options.ecmaVersion > 10 && starttype === tt._import) {
+      skipWhiteSpace.lastIndex = this.pos
+      let skip = skipWhiteSpace.exec(this.input)
+      let next = this.pos + skip[0].length, nextCh = this.input.charCodeAt(next)
+      if (nextCh === 40) // '('
+        return this.parseExpressionStatement(node, this.parseExpression())
+    }
+
     if (!this.options.allowImportExportEverywhere) {
       if (!topLevel)
         this.raise(this.start, "'import' and 'export' may only appear at the top level")
diff --git a/acorn/src/tokentype.js b/acorn/src/tokentype.js
index 76b145fda..7a8c48a6d 100644
--- a/acorn/src/tokentype.js
+++ b/acorn/src/tokentype.js
@@ -136,7 +136,7 @@ export const types = {
   _class: kw("class", startsExpr),
   _extends: kw("extends", beforeExpr),
   _export: kw("export"),
-  _import: kw("import"),
+  _import: kw("import", startsExpr),
   _null: kw("null", startsExpr),
   _true: kw("true", startsExpr),
   _false: kw("false", startsExpr),
diff --git a/bin/run_test262.js b/bin/run_test262.js
index 27c60c742..c540507d7 100644
--- a/bin/run_test262.js
+++ b/bin/run_test262.js
@@ -10,7 +10,6 @@ const unsupportedFeatures = [
   "class-static-fields-private",
   "class-static-fields-public",
   "class-static-methods-private",
-  "dynamic-import",
   "export-star-as-namespace-from-module",
   "import.meta",
   "numeric-separator-literal"
diff --git a/test/run.js b/test/run.js
index 068948fdc..4ea981b90 100644
--- a/test/run.js
+++ b/test/run.js
@@ -15,6 +15,7 @@
   require("./tests-json-superset.js");
   require("./tests-optional-catch-binding.js");
   require("./tests-bigint.js");
+  require("./tests-dynamic-import.js");
   var acorn = require("../acorn")
   var acorn_loose = require("../acorn-loose")
 
diff --git a/test/tests-dynamic-import.js b/test/tests-dynamic-import.js
new file mode 100644
index 000000000..18c23d3a8
--- /dev/null
+++ b/test/tests-dynamic-import.js
@@ -0,0 +1,128 @@
+// Tests for ECMAScript 2020 dynamic import
+
+if (typeof exports != 'undefined') {
+  var test = require('./driver.js').test;
+  var testFail = require('./driver.js').testFail;
+}
+
+test(
+  "import('dynamicImport.js')",
+  {
+    type: 'Program',
+    start: 0,
+    end: 26,
+    body: [
+      {
+        type: 'ExpressionStatement',
+        start: 0,
+        end: 26,
+        expression: {
+          type: 'CallExpression',
+          start: 0,
+          end: 26,
+          callee: { type: 'Import', start: 0, end: 6 },
+          arguments: [
+            {
+              type: 'Literal',
+              start: 7,
+              end: 25,
+              value: 'dynamicImport.js',
+              raw: "'dynamicImport.js'"
+            }
+          ]
+        }
+      }
+    ],
+    sourceType: 'script'
+  },
+  { ecmaVersion: 11 }
+);
+
+test(
+  "function* a() { yield import('http'); }",
+  {
+    type: 'Program',
+    start: 0,
+    end: 39,
+    body: [
+      {
+        type: 'FunctionDeclaration',
+        start: 0,
+        end: 39,
+        id: { type: 'Identifier', start: 10, end: 11, name: 'a' },
+        expression: false,
+        generator: true,
+        async: false,
+        params: [],
+        body: {
+          type: 'BlockStatement',
+          start: 14,
+          end: 39,
+          body: [
+            {
+              type: 'ExpressionStatement',
+              start: 16,
+              end: 37,
+              expression: {
+                type: 'YieldExpression',
+                start: 16,
+                end: 36,
+                delegate: false,
+                argument: {
+                  type: 'CallExpression',
+                  start: 22,
+                  end: 36,
+                  callee: { type: 'Import', start: 22, end: 28 },
+                  arguments: [{ type: 'Literal', start: 29, end: 35, value: 'http', raw: "'http'" }]
+                }
+              }
+            }
+          ]
+        }
+      }
+    ],
+    sourceType: 'script'
+  },
+  { ecmaVersion: 11 }
+);
+
+testFail('function failsParse() { return import.then(); }', 'Unexpected token (1:37)', {
+  ecmaVersion: 11,
+  loose: false
+});
+
+testFail("var dynImport = import; dynImport('http');", 'Unexpected token (1:22)', {
+  ecmaVersion: 11,
+  loose: false
+});
+
+testFail("import('test.js')", 'Unexpected token (1:6)', {
+  ecmaVersion: 10,
+  loose: false,
+  sourceType: 'module'
+});
+
+testFail("import()", 'import() requires exactly one argument (1:0)', {
+  ecmaVersion: 11,
+  loose: false
+});
+
+testFail("import(a, b)", 'import() requires exactly one argument (1:0)', {
+  ecmaVersion: 11,
+  loose: false
+});
+
+testFail("import(...[a])", '... is not allowed in import() (1:7)', {
+  ecmaVersion: 11,
+  loose: false
+});
+
+testFail("import(source,)", 'Unexpected token (1:14)', {
+  ecmaVersion: 11,
+  loose: false
+});
+
+testFail("new import(source)", 'Cannot use new with import(...) (1:4)', {
+  ecmaVersion: 11,
+  loose: false
+});

From 9de4a0f8ab98c61c491ba06d21599508106996b9 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 4 Jul 2019 08:16:11 +0200
Subject: [PATCH 18/37] Remove links to plugins that are part of the library
 now

---
 acorn/README.md | 2 --
 1 file changed, 2 deletions(-)

diff --git a/acorn/README.md b/acorn/README.md
index 3e4424f2c..fa372ee68 100644
--- a/acorn/README.md
+++ b/acorn/README.md
@@ -260,9 +260,7 @@ The utility spits out the syntax tree as JSON data.
 Plugins for ECMAScript proposals:
  
  - [`acorn-stage3`](https://github.com/acornjs/acorn-stage3): Parse most stage 3 proposals, bundling:
-   - [`acorn-bigint`](https://github.com/acornjs/acorn-bigint): Parse [BigInt proposal](https://github.com/tc39/proposal-bigint)
    - [`acorn-class-fields`](https://github.com/acornjs/acorn-class-fields): Parse [class fields proposal](https://github.com/tc39/proposal-class-fields)
-   - [`acorn-dynamic-import`](https://github.com/kesne/acorn-dynamic-import): Parse [import() proposal](https://github.com/tc39/proposal-dynamic-import)
    - [`acorn-import-meta`](https://github.com/acornjs/acorn-import-meta): Parse [import.meta proposal](https://github.com/tc39/proposal-import-meta)
    - [`acorn-numeric-separator`](https://github.com/acornjs/acorn-numeric-separator): Parse [numeric separator proposal](https://github.com/tc39/proposal-numeric-separator)
    - [`acorn-private-methods`](https://github.com/acornjs/acorn-private-methods): parse [private methods, getters and setters proposal](https://github.com/tc39/proposal-private-methods)n

From 6589c57f4f8ce0990f8ab7985104edf4b495ed08 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 4 Jul 2019 08:17:07 +0200
Subject: [PATCH 19/37] Mark version 6.2.0

---
 acorn/CHANGELOG.md | 16 ++++++++++++++++
 acorn/package.json |  2 +-
 acorn/src/index.js |  2 +-
 3 files changed, 18 insertions(+), 2 deletions(-)

diff --git a/acorn/CHANGELOG.md b/acorn/CHANGELOG.md
index 1c8f79cd7..f94f23ccf 100644
--- a/acorn/CHANGELOG.md
+++ b/acorn/CHANGELOG.md
@@ -1,3 +1,19 @@
+## 6.2.0 (2019-07-04)
+
+### Bug fixes
+
+Improve valid assignment checking in `for`/`in` and `for`/`of` loops.
+
+Disallow binding `let` in patterns.
+
+### New features
+
+Support bigint syntax with `ecmaVersion` >= 10.
+
+Support dynamic `import` syntax with `ecmaVersion` >= 10.
+
+Upgrade to Unicode version 12.
+
 ## 6.1.1 (2019-02-27)
 
 ### Bug fixes
diff --git a/acorn/package.json b/acorn/package.json
index 808d1dac1..446e6b065 100644
--- a/acorn/package.json
+++ b/acorn/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn.js",
   "module": "dist/acorn.mjs",
-  "version": "6.1.1",
+  "version": "6.2.0",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {
diff --git a/acorn/src/index.js b/acorn/src/index.js
index 510648e5f..e2209fa92 100644
--- a/acorn/src/index.js
+++ b/acorn/src/index.js
@@ -32,7 +32,7 @@ export {isIdentifierChar, isIdentifierStart} from "./identifier"
 export {Token} from "./tokenize"
 export {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
 
-export const version = "6.1.1"
+export const version = "6.2.0"
 
 // The main exported interface (under `self.acorn` when in the
 // browser) is a `parse` function that takes a code string and

From 517ddd43c161729c1c63e6105e26edfcb0e571be Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 4 Jul 2019 08:24:45 +0200
Subject: [PATCH 20/37] Mark acorn-loose 6.1.0

---
 acorn-loose/CHANGELOG.md | 8 ++++++++
 acorn-loose/package.json | 4 ++--
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/acorn-loose/CHANGELOG.md b/acorn-loose/CHANGELOG.md
index 014309bf7..495184ece 100644
--- a/acorn-loose/CHANGELOG.md
+++ b/acorn-loose/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 6.1.0 (2019-07-04)
+
+## New features
+
+Support bigint syntax.
+
+Support dynamic import.
+
 ## 6.0.0 (2018-09-14)
 
 ### Breaking changes
diff --git a/acorn-loose/package.json b/acorn-loose/package.json
index 08f564edf..5adabfc9e 100644
--- a/acorn-loose/package.json
+++ b/acorn-loose/package.json
@@ -4,10 +4,10 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn-loose.js",
   "module": "dist/acorn-loose.mjs",
-  "version": "6.0.0",
+  "version": "6.1.0",
   "engines": {"node": ">=0.4.0"},
   "dependencies": {
-    "acorn": "^6.0.0"
+    "acorn": "^6.2.0"
   },
   "maintainers": [
     {

From 3ceae8528545c83f49b72703e8de804b72338062 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 4 Jul 2019 08:32:14 +0200
Subject: [PATCH 21/37] Support Import nodes in walker

---
 acorn-walk/src/index.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn-walk/src/index.js b/acorn-walk/src/index.js
index 25f5166f1..fb341507d 100644
--- a/acorn-walk/src/index.js
+++ b/acorn-walk/src/index.js
@@ -360,7 +360,7 @@ base.ImportDeclaration = (node, st, c) => {
     c(spec, st)
   c(node.source, st, "Expression")
 }
-base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = ignore
+base.ImportSpecifier = base.ImportDefaultSpecifier = base.ImportNamespaceSpecifier = base.Identifier = base.Literal = base.Import = ignore
 
 base.TaggedTemplateExpression = (node, st, c) => {
   c(node.tag, st, "Expression")

From 109b1b0bc7b5693c83d3d0ea21d5a54ceec03542 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 4 Jul 2019 08:34:14 +0200
Subject: [PATCH 22/37] Mark acorn-walk version 6.2.0

---
 acorn-walk/CHANGELOG.md | 6 ++++++
 acorn-walk/package.json | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/acorn-walk/CHANGELOG.md b/acorn-walk/CHANGELOG.md
index 525950b51..c02dbd7dd 100644
--- a/acorn-walk/CHANGELOG.md
+++ b/acorn-walk/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 6.2.0 (2017-07-04)
+
+### New features
+
+Add support for `Import` nodes.
+
 ## 6.1.0 (2018-09-28)
 
 ### New features
diff --git a/acorn-walk/package.json b/acorn-walk/package.json
index aee3f2584..239e6c729 100644
--- a/acorn-walk/package.json
+++ b/acorn-walk/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/walk.js",
   "module": "dist/walk.mjs",
-  "version": "6.1.1",
+  "version": "6.2.0",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {

From 51b67463c67f7e46b9c818d1403dba6e5c5d2a2b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BE=99=E8=85=BE=E9=81=93?= <LongTengDao@LongTengDao.com>
Date: Thu, 11 Jul 2019 22:34:24 +0800
Subject: [PATCH 23/37] update options.allowReserved in d.ts follow README

---
 acorn/dist/acorn.d.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/dist/acorn.d.ts b/acorn/dist/acorn.d.ts
index c6f9841b8..9d6bb784f 100644
--- a/acorn/dist/acorn.d.ts
+++ b/acorn/dist/acorn.d.ts
@@ -16,7 +16,7 @@ declare namespace acorn {
     sourceType?: 'script' | 'module'
     onInsertedSemicolon?: (lastTokEnd: number, lastTokEndLoc?: Position) => void
     onTrailingComma?: (lastTokEnd: number, lastTokEndLoc?: Position) => void
-    allowReserved?: boolean
+    allowReserved?: boolean | 'never'
     allowReturnOutsideFunction?: boolean
     allowImportExportEverywhere?: boolean
     allowAwaitOutsideFunction?: boolean

From 9358d291721544bafa31e0b6e6e2baa1f2ab38a9 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Thu, 11 Jul 2019 17:03:12 +0200
Subject: [PATCH 24/37] Fix test for options.allowReserved to take 'never'
 value into account

Issue #842
---
 acorn/src/state.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/src/state.js b/acorn/src/state.js
index dce754fb8..73e49b9f3 100644
--- a/acorn/src/state.js
+++ b/acorn/src/state.js
@@ -11,7 +11,7 @@ export class Parser {
     this.sourceFile = options.sourceFile
     this.keywords = wordsRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])
     let reserved = ""
-    if (!options.allowReserved) {
+    if (options.allowReserved !== true) {
       for (let v = options.ecmaVersion;; v--)
         if (reserved = reservedWords[v]) break
       if (options.sourceType === "module") reserved += " await"

From eea9223a33b88ca8078effd1e3ad54e233643ed9 Mon Sep 17 00:00:00 2001
From: Toru Nagashima <public@mysticatea.dev>
Date: Sat, 20 Jul 2019 19:19:04 +0900
Subject: [PATCH 25/37] Fix identifier (fixes #846)

---
 acorn/src/identifier.js          | 5 ++---
 bin/generate-identifier-regex.js | 2 +-
 test/tests.js                    | 2 ++
 3 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/acorn/src/identifier.js b/acorn/src/identifier.js
index b00e391de..c768a2d79 100644
--- a/acorn/src/identifier.js
+++ b/acorn/src/identifier.js
@@ -26,9 +26,8 @@ export const keywordRelationalOperator = /^in(stanceof)?$/
 // are only applied when a character is found to actually have a
 // code point above 128.
 // Generated by `bin/generate-identifier-regex.js`.
-
-let nonASCIIidentifierStartChars = "aab5bac0-d6d8-f6f8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7c6\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab67\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
-let nonASCIIidentifierChars = "\u200c\u200db7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
+let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08bd\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d05-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31ba\u31f0-\u31ff\u3400-\u4db5\u4e00-\u9fef\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7c6\ua7f7-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab67\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"
+let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d82\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"
 
 const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]")
 const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]")
diff --git a/bin/generate-identifier-regex.js b/bin/generate-identifier-regex.js
index 07e4540a0..d661d7224 100644
--- a/bin/generate-identifier-regex.js
+++ b/bin/generate-identifier-regex.js
@@ -18,7 +18,7 @@ function search(arr, ch, starting) {
 
 function esc(code) {
   let hex = code.toString(16)
-  return hex.length <= 2 ? hex.padStart(2, "0") : "\\u" + hex.padStart(4, "0")
+  return hex.length <= 2 ? "\\x" + hex.padStart(2, "0") : "\\u" + hex.padStart(4, "0")
 }
 
 function generate(chars) {
diff --git a/test/tests.js b/test/tests.js
index 799c32c43..ca07b3a71 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -29406,3 +29406,5 @@ test("'use strict'; let foo = function foo() {}", {}, {ecmaVersion: 6})
 
 test("/**/ --> comment\n", {})
 test("x.class++", {})
+
+testFail("½", "Unexpected character '½' (1:0)")

From a03c650dbb027452a469e8ef6f092bc7341e0015 Mon Sep 17 00:00:00 2001
From: Toru Nagashima <public@mysticatea.dev>
Date: Sat, 20 Jul 2019 19:29:07 +0900
Subject: [PATCH 26/37] fix unicode-property-data

Refs https://github.com/acornjs/acorn/commit/dfcdbe4014cee1996129a8275bae28380cccd20c#r34363967
---
 acorn/src/regexp.js                |  2 +-
 acorn/src/unicode-property-data.js | 11 +++++++++--
 2 files changed, 10 insertions(+), 3 deletions(-)

diff --git a/acorn/src/regexp.js b/acorn/src/regexp.js
index 00a4dc244..ee19bcf55 100644
--- a/acorn/src/regexp.js
+++ b/acorn/src/regexp.js
@@ -9,7 +9,7 @@ export class RegExpValidationState {
   constructor(parser) {
     this.parser = parser
     this.validFlags = `gim${parser.options.ecmaVersion >= 6 ? "uy" : ""}${parser.options.ecmaVersion >= 9 ? "s" : ""}`
-    this.unicodeProperties = UNICODE_PROPERTY_VALUES[parser.options.ecmaVersion >= 10 ? 10 : parser.options.ecmaVersion]
+    this.unicodeProperties = UNICODE_PROPERTY_VALUES[parser.options.ecmaVersion >= 11 ? 11 : parser.options.ecmaVersion]
     this.source = ""
     this.flags = ""
     this.start = 0
diff --git a/acorn/src/unicode-property-data.js b/acorn/src/unicode-property-data.js
index 4e060ed9e..967ed1a36 100644
--- a/acorn/src/unicode-property-data.js
+++ b/acorn/src/unicode-property-data.js
@@ -6,9 +6,12 @@ import {wordsRegexp} from "./util.js"
 
 // #table-binary-unicode-properties
 const ecma9BinaryProperties = "ASCII ASCII_Hex_Digit AHex Alphabetic Alpha Any Assigned Bidi_Control Bidi_C Bidi_Mirrored Bidi_M Case_Ignorable CI Cased Changes_When_Casefolded CWCF Changes_When_Casemapped CWCM Changes_When_Lowercased CWL Changes_When_NFKC_Casefolded CWKCF Changes_When_Titlecased CWT Changes_When_Uppercased CWU Dash Default_Ignorable_Code_Point DI Deprecated Dep Diacritic Dia Emoji Emoji_Component Emoji_Modifier Emoji_Modifier_Base Emoji_Presentation Extender Ext Grapheme_Base Gr_Base Grapheme_Extend Gr_Ext Hex_Digit Hex IDS_Binary_Operator IDSB IDS_Trinary_Operator IDST ID_Continue IDC ID_Start IDS Ideographic Ideo Join_Control Join_C Logical_Order_Exception LOE Lowercase Lower Math Noncharacter_Code_Point NChar Pattern_Syntax Pat_Syn Pattern_White_Space Pat_WS Quotation_Mark QMark Radical Regional_Indicator RI Sentence_Terminal STerm Soft_Dotted SD Terminal_Punctuation Term Unified_Ideograph UIdeo Uppercase Upper Variation_Selector VS White_Space space XID_Continue XIDC XID_Start XIDS"
+const ecma10BinaryProperties = ecma9BinaryProperties + " Extended_Pictographic"
+const ecma11BinaryProperties = ecma10BinaryProperties
 const unicodeBinaryProperties = {
   9: ecma9BinaryProperties,
-  10: ecma9BinaryProperties + " Extended_Pictographic"
+  10: ecma10BinaryProperties,
+  11: ecma11BinaryProperties
 }
 
 // #table-unicode-general-category-values
@@ -16,9 +19,12 @@ const unicodeGeneralCategoryValues = "Cased_Letter LC Close_Punctuation Pe Conne
 
 // #table-unicode-script-values
 const ecma9ScriptValues = "Adlam Adlm Ahom Ahom Anatolian_Hieroglyphs Hluw Arabic Arab Armenian Armn Avestan Avst Balinese Bali Bamum Bamu Bassa_Vah Bass Batak Batk Bengali Beng Bhaiksuki Bhks Bopomofo Bopo Brahmi Brah Braille Brai Buginese Bugi Buhid Buhd Canadian_Aboriginal Cans Carian Cari Caucasian_Albanian Aghb Chakma Cakm Cham Cham Cherokee Cher Common Zyyy Coptic Copt Qaac Cuneiform Xsux Cypriot Cprt Cyrillic Cyrl Deseret Dsrt Devanagari Deva Duployan Dupl Egyptian_Hieroglyphs Egyp Elbasan Elba Ethiopic Ethi Georgian Geor Glagolitic Glag Gothic Goth Grantha Gran Greek Grek Gujarati Gujr Gurmukhi Guru Han Hani Hangul Hang Hanunoo Hano Hatran Hatr Hebrew Hebr Hiragana Hira Imperial_Aramaic Armi Inherited Zinh Qaai Inscriptional_Pahlavi Phli Inscriptional_Parthian Prti Javanese Java Kaithi Kthi Kannada Knda Katakana Kana Kayah_Li Kali Kharoshthi Khar Khmer Khmr Khojki Khoj Khudawadi Sind Lao Laoo Latin Latn Lepcha Lepc Limbu Limb Linear_A Lina Linear_B Linb Lisu Lisu Lycian Lyci Lydian Lydi Mahajani Mahj Malayalam Mlym Mandaic Mand Manichaean Mani Marchen Marc Masaram_Gondi Gonm Meetei_Mayek Mtei Mende_Kikakui Mend Meroitic_Cursive Merc Meroitic_Hieroglyphs Mero Miao Plrd Modi Modi Mongolian Mong Mro Mroo Multani Mult Myanmar Mymr Nabataean Nbat New_Tai_Lue Talu Newa Newa Nko Nkoo Nushu Nshu Ogham Ogam Ol_Chiki Olck Old_Hungarian Hung Old_Italic Ital Old_North_Arabian Narb Old_Permic Perm Old_Persian Xpeo Old_South_Arabian Sarb Old_Turkic Orkh Oriya Orya Osage Osge Osmanya Osma Pahawh_Hmong Hmng Palmyrene Palm Pau_Cin_Hau Pauc Phags_Pa Phag Phoenician Phnx Psalter_Pahlavi Phlp Rejang Rjng Runic Runr Samaritan Samr Saurashtra Saur Sharada Shrd Shavian Shaw Siddham Sidd SignWriting Sgnw Sinhala Sinh Sora_Sompeng Sora Soyombo Soyo Sundanese Sund Syloti_Nagri Sylo Syriac Syrc Tagalog Tglg Tagbanwa Tagb Tai_Le Tale Tai_Tham Lana Tai_Viet Tavt Takri Takr Tamil Taml Tangut Tang Telugu Telu Thaana Thaa Thai Thai Tibetan Tibt Tifinagh Tfng Tirhuta Tirh Ugaritic Ugar Vai Vaii Warang_Citi Wara Yi Yiii Zanabazar_Square Zanb"
+const ecma10ScriptValues = ecma9ScriptValues + " Dogra Dogr Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Old_Sogdian Sogo Sogdian Sogd"
+const ecma11ScriptValues = ecma10ScriptValues + " Elymaic Elym Nandinagari Nand Nyiakeng_Puachue_Hmong Hmnp Wancho Wcho"
 const unicodeScriptValues = {
   9: ecma9ScriptValues,
-  10: ecma9ScriptValues + " Dogra Dogr Elymaic Elym Gunjala_Gondi Gong Hanifi_Rohingya Rohg Makasar Maka Medefaidrin Medf Nandinagari Nand Nyiakeng_Puachue_Hmong Hmnp Old_Sogdian Sogo Sogdian Sogd Wancho Wcho"
+  10: ecma10ScriptValues,
+  11: ecma11ScriptValues
 }
 
 const data = {}
@@ -38,5 +44,6 @@ function buildUnicodeData(ecmaVersion) {
 }
 buildUnicodeData(9)
 buildUnicodeData(10)
+buildUnicodeData(11)
 
 export default data

From a452b10cf8f5b126c44c7985e43a2230acce6703 Mon Sep 17 00:00:00 2001
From: Toru Nagashima <public@mysticatea.dev>
Date: Sat, 20 Jul 2019 19:41:40 +0900
Subject: [PATCH 27/37] Fix wrong field in package.json

---
 package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/package.json b/package.json
index aa22c2a44..eb0dd1c73 100644
--- a/package.json
+++ b/package.json
@@ -12,7 +12,7 @@
     },
     {
       "name": "Adrian Heine",
-      "email": "http://adrianheine.de"
+      "web": "http://adrianheine.de"
     }
   ],
   "repository": {

From 77c20fa2c2f490e646b67e6a0ff7e75fb54ab6c8 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Sat, 20 Jul 2019 16:29:38 +0200
Subject: [PATCH 28/37] Mark version 6.2.1

---
 acorn/CHANGELOG.md | 8 ++++++++
 acorn/package.json | 2 +-
 acorn/src/index.js | 2 +-
 3 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/acorn/CHANGELOG.md b/acorn/CHANGELOG.md
index f94f23ccf..f2cd6a4b6 100644
--- a/acorn/CHANGELOG.md
+++ b/acorn/CHANGELOG.md
@@ -1,3 +1,11 @@
+## 6.2.1 (2019-07-21)
+
+### Bug fixes
+
+Fix bug causing Acorn to treat some characters as identifier characters that shouldn't be treated as such.
+
+Fix issue where setting the `allowReserved` option to `"never"` allowed reserved words in some circumstances.
+
 ## 6.2.0 (2019-07-04)
 
 ### Bug fixes
diff --git a/acorn/package.json b/acorn/package.json
index 446e6b065..c6f812313 100644
--- a/acorn/package.json
+++ b/acorn/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn.js",
   "module": "dist/acorn.mjs",
-  "version": "6.2.0",
+  "version": "6.2.1",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {
diff --git a/acorn/src/index.js b/acorn/src/index.js
index e2209fa92..1fb6877ff 100644
--- a/acorn/src/index.js
+++ b/acorn/src/index.js
@@ -32,7 +32,7 @@ export {isIdentifierChar, isIdentifierStart} from "./identifier"
 export {Token} from "./tokenize"
 export {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
 
-export const version = "6.2.0"
+export const version = "6.2.1"
 
 // The main exported interface (under `self.acorn` when in the
 // browser) is a `parse` function that takes a code string and

From 1555c528855b10320ce98b4154906d7898c92990 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BE=99=E8=85=BE=E9=81=93?= <LongTengDao@LongTengDao.com>
Date: Wed, 7 Aug 2019 05:44:06 +0800
Subject: [PATCH 29/37] Update acorn.d.ts

---
 acorn/dist/acorn.d.ts | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/acorn/dist/acorn.d.ts b/acorn/dist/acorn.d.ts
index 9d6bb784f..c68e23912 100644
--- a/acorn/dist/acorn.d.ts
+++ b/acorn/dist/acorn.d.ts
@@ -36,14 +36,14 @@ declare namespace acorn {
 
   class Parser {
     constructor(options: Options, input: string, startPos?: number)
-    parse(): Node
-    static parse(input: string, options?: Options): Node
-    static parseExpressionAt(input: string, pos: number, options?: Options): Node
-    static tokenizer(input: string, options?: Options): {
+    parse(this: Parser): Node
+    static parse(this: typeof Parser, input: string, options?: Options): Node
+    static parseExpressionAt(this: typeof Parser, input: string, pos: number, options?: Options): Node
+    static tokenizer(this: typeof Parser, input: string, options?: Options): {
       getToken(): Token
       [Symbol.iterator](): Iterator<Token>
     }
-    static extend(...plugins: ((BaseParser: typeof Parser) => typeof Parser)[]): typeof Parser
+    static extend(this: typeof Parser, ...plugins: ((BaseParser: typeof Parser) => typeof Parser)[]): typeof Parser
   }
 
   interface Position { line: number; column: number; offset: number }

From e2b8cc087386eccc2ad6fd4a02b4257833557cb3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BE=99=E8=85=BE=E9=81=93?= <LongTengDao@LongTengDao.com>
Date: Thu, 8 Aug 2019 01:11:42 +0800
Subject: [PATCH 30/37] Fix broken parsing of new expressions when
 allowReserved=="never"

---
 acorn/src/expression.js |  5 ++---
 test/tests.js           | 27 +++++++++++++++++++++++++++
 2 files changed, 29 insertions(+), 3 deletions(-)

diff --git a/acorn/src/expression.js b/acorn/src/expression.js
index 7a4aed93b..b338141e8 100644
--- a/acorn/src/expression.js
+++ b/acorn/src/expression.js
@@ -272,7 +272,7 @@ pp.parseSubscript = function(base, startPos, startLoc, noCalls, maybeAsyncArrow)
   if (computed || this.eat(tt.dot)) {
     let node = this.startNodeAt(startPos, startLoc)
     node.object = base
-    node.property = computed ? this.parseExpression() : this.parseIdent(true)
+    node.property = computed ? this.parseExpression() : this.parseIdent(this.options.allowReserved !== "never")
     node.computed = !!computed
     if (computed) this.expect(tt.bracketR)
     base = this.finishNode(node, "MemberExpression")
@@ -734,7 +734,7 @@ pp.parsePropertyName = function(prop) {
       prop.computed = false
     }
   }
-  return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(true)
+  return prop.key = this.type === tt.num || this.type === tt.string ? this.parseExprAtom() : this.parseIdent(this.options.allowReserved !== "never")
 }
 
 // Initialize empty function node.
@@ -902,7 +902,6 @@ pp.checkUnreserved = function({start, end, name}) {
 
 pp.parseIdent = function(liberal, isBinding) {
   let node = this.startNode()
-  if (liberal && this.options.allowReserved === "never") liberal = false
   if (this.type === tt.name) {
     node.name = this.value
   } else if (this.type.keyword) {
diff --git a/test/tests.js b/test/tests.js
index ca07b3a71..eeaaf0d7f 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -7,6 +7,33 @@ if (typeof exports != "undefined") {
   var acorn = require("../acorn");
 }
 
+test("new Object", {
+  type: "Program",
+  start: 0,
+  end: 10,
+  body: [
+    {
+      type: "ExpressionStatement",
+      start: 0,
+      end: 10,
+      expression: {
+        type: "NewExpression",
+        start: 0,
+        end: 10,
+        callee: {
+          type: "Identifier",
+          start: 4,
+          end: 10,
+          name: "Object"
+        },
+        arguments: []
+      }
+    }
+  ]
+}, {
+  allowReserved: "never"
+});
+
 test("this\n", {
   type: "Program",
   body: [

From 7e9817d17639d95cc6dbacfde734a0626b2a7dea Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=BE=99=E8=85=BE=E9=81=93?= <LongTengDao@LongTengDao.com>
Date: Mon, 12 Aug 2019 14:07:33 +0800
Subject: [PATCH 31/37] Allow sourceType: module even with ecmaVersion < 6

---
 acorn-loose/src/statement.js |  4 +---
 acorn/README.md              |  3 +++
 acorn/src/identifier.js      |  1 +
 acorn/src/state.js           |  2 +-
 acorn/src/statement.js       |  4 +---
 test/tests.js                | 29 +++++++++++++++++++++++++++++
 6 files changed, 36 insertions(+), 7 deletions(-)

diff --git a/acorn-loose/src/statement.js b/acorn-loose/src/statement.js
index ac208424e..a5b574044 100644
--- a/acorn-loose/src/statement.js
+++ b/acorn-loose/src/statement.js
@@ -10,9 +10,7 @@ lp.parseTopLevel = function() {
   while (this.tok.type !== tt.eof) node.body.push(this.parseStatement())
   this.toks.adaptDirectivePrologue(node.body)
   this.last = this.tok
-  if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
-  }
+  node.sourceType = this.options.sourceType
   return this.finishNode(node, "Program")
 }
 
diff --git a/acorn/README.md b/acorn/README.md
index fa372ee68..bcf85ccba 100644
--- a/acorn/README.md
+++ b/acorn/README.md
@@ -64,6 +64,9 @@ an object containing any of these fields:
   either `"script"` or `"module"`. This influences global strict mode
   and parsing of `import` and `export` declarations.
 
+  **NOTE**: If set to `"module"`, then static `import` / `export` syntax
+  will be valid, even if `ecmaVersion` is less than 6.
+
 - **onInsertedSemicolon**: If given a callback, that callback will be
   called whenever a missing semicolon is inserted by the parser. The
   callback will be given the character offset of the point where the
diff --git a/acorn/src/identifier.js b/acorn/src/identifier.js
index c768a2d79..339066260 100644
--- a/acorn/src/identifier.js
+++ b/acorn/src/identifier.js
@@ -14,6 +14,7 @@ const ecma5AndLessKeywords = "break case catch continue debugger default do else
 
 export const keywords = {
   5: ecma5AndLessKeywords,
+  "5module": ecma5AndLessKeywords + " export import",
   6: ecma5AndLessKeywords + " const class extends export import super"
 }
 
diff --git a/acorn/src/state.js b/acorn/src/state.js
index 73e49b9f3..eb4e0e120 100644
--- a/acorn/src/state.js
+++ b/acorn/src/state.js
@@ -9,7 +9,7 @@ export class Parser {
   constructor(options, input, startPos) {
     this.options = options = getOptions(options)
     this.sourceFile = options.sourceFile
-    this.keywords = wordsRegexp(keywords[options.ecmaVersion >= 6 ? 6 : 5])
+    this.keywords = wordsRegexp(keywords[options.ecmaVersion >= 6 ? 6 : options.sourceType === "module" ? "5module" : 5])
     let reserved = ""
     if (options.allowReserved !== true) {
       for (let v = options.ecmaVersion;; v--)
diff --git a/acorn/src/statement.js b/acorn/src/statement.js
index d423b5910..8cadb5118 100644
--- a/acorn/src/statement.js
+++ b/acorn/src/statement.js
@@ -27,9 +27,7 @@ pp.parseTopLevel = function(node) {
       this.raiseRecoverable(this.undefinedExports[name].start, `Export '${name}' is not defined`)
   this.adaptDirectivePrologue(node.body)
   this.next()
-  if (this.options.ecmaVersion >= 6) {
-    node.sourceType = this.options.sourceType
-  }
+  node.sourceType = this.options.sourceType
   return this.finishNode(node, "Program")
 }
 
diff --git a/test/tests.js b/test/tests.js
index eeaaf0d7f..35fe29ca5 100644
--- a/test/tests.js
+++ b/test/tests.js
@@ -7,6 +7,35 @@ if (typeof exports != "undefined") {
   var acorn = require("../acorn");
 }
 
+test("import ''", {
+  type: "Program",
+  start: 0,
+  end: 9,
+  body: [
+    {
+      type: "ImportDeclaration",
+      start: 0,
+      end: 9,
+      specifiers: [],
+      source: {
+        type: "Literal",
+        start: 7,
+        end: 9,
+        value: "",
+        raw: "''"
+      }
+    }
+  ]
+}, {
+  ecmaVersion: 5,
+  sourceType: "module"
+});
+
+testFail("import('')", "Unexpected token (1:6)", {
+  ecmaVersion: 5,
+  sourceType: "module"
+});
+
 test("new Object", {
   type: "Program",
   start: 0,

From ac6decb94a3aa4eee99230fdaf5883dfaafe8479 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Mon, 12 Aug 2019 11:40:59 +0200
Subject: [PATCH 32/37] Mark version 6.3.0

---
 acorn/CHANGELOG.md | 6 ++++++
 acorn/package.json | 2 +-
 acorn/src/index.js | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/acorn/CHANGELOG.md b/acorn/CHANGELOG.md
index f2cd6a4b6..6b71c9899 100644
--- a/acorn/CHANGELOG.md
+++ b/acorn/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 6.3.0 (2019-08-12)
+
+### New features
+
+`sourceType: "module"` can now be used even when `ecmaVersion` is less than 6, to parse module-style code that otherwise conforms to an older standard.
+
 ## 6.2.1 (2019-07-21)
 
 ### Bug fixes
diff --git a/acorn/package.json b/acorn/package.json
index c6f812313..480ea2d25 100644
--- a/acorn/package.json
+++ b/acorn/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn.js",
   "module": "dist/acorn.mjs",
-  "version": "6.2.1",
+  "version": "6.3.0",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {
diff --git a/acorn/src/index.js b/acorn/src/index.js
index 1fb6877ff..64ca2752e 100644
--- a/acorn/src/index.js
+++ b/acorn/src/index.js
@@ -32,7 +32,7 @@ export {isIdentifierChar, isIdentifierStart} from "./identifier"
 export {Token} from "./tokenize"
 export {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
 
-export const version = "6.2.1"
+export const version = "6.3.0"
 
 // The main exported interface (under `self.acorn` when in the
 // browser) is a `parse` function that takes a code string and

From efe273e70123449a458157dbf578afaf109a49ab Mon Sep 17 00:00:00 2001
From: Toru Nagashima <public@mysticatea.dev>
Date: Fri, 30 Aug 2019 21:46:35 +0900
Subject: [PATCH 33/37] give token types and etc to plugins

# Conflicts:
#	acorn/src/index.js
---
 acorn/src/index.js | 58 +++++++++++++++++++++++++++++++++++++++-------
 1 file changed, 49 insertions(+), 9 deletions(-)

diff --git a/acorn/src/index.js b/acorn/src/index.js
index 64ca2752e..3ca74ccce 100644
--- a/acorn/src/index.js
+++ b/acorn/src/index.js
@@ -22,17 +22,57 @@ import "./expression"
 import "./location"
 import "./scope"
 
-export {Parser} from "./state"
-export {defaultOptions} from "./options"
-export {Position, SourceLocation, getLineInfo} from "./locutil"
-export {Node} from "./node"
-export {TokenType, types as tokTypes, keywords as keywordTypes} from "./tokentype"
-export {TokContext, types as tokContexts} from "./tokencontext"
-export {isIdentifierChar, isIdentifierStart} from "./identifier"
-export {Token} from "./tokenize"
-export {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
+import {defaultOptions} from "./options"
+import {Position, SourceLocation, getLineInfo} from "./locutil"
+import {Node} from "./node"
+import {TokenType, types as tokTypes, keywords as keywordTypes} from "./tokentype"
+import {TokContext, types as tokContexts} from "./tokencontext"
+import {isIdentifierChar, isIdentifierStart} from "./identifier"
+import {Token} from "./tokenize"
+import {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
 
 export const version = "6.3.0"
+export {
+  Parser,
+  defaultOptions,
+  Position,
+  SourceLocation,
+  getLineInfo,
+  Node,
+  TokenType,
+  tokTypes,
+  keywordTypes,
+  TokContext,
+  tokContexts,
+  isIdentifierChar,
+  isIdentifierStart,
+  Token,
+  isNewLine,
+  lineBreak,
+  lineBreakG,
+  nonASCIIwhitespace
+}
+
+Parser.acorn = {
+  version,
+  defaultOptions,
+  Position,
+  SourceLocation,
+  getLineInfo,
+  Node,
+  TokenType,
+  tokTypes,
+  keywordTypes,
+  TokContext,
+  tokContexts,
+  isIdentifierChar,
+  isIdentifierStart,
+  Token,
+  isNewLine,
+  lineBreak,
+  lineBreakG,
+  nonASCIIwhitespace
+}
 
 // The main exported interface (under `self.acorn` when in the
 // browser) is a `parse` function that takes a code string and

From 53034126864b492da4e278628bb972cb2a9313d4 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Tue, 24 Sep 2019 08:30:32 +0200
Subject: [PATCH 34/37] Also export Parser via Parser.acorn

---
 acorn/src/index.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/acorn/src/index.js b/acorn/src/index.js
index 3ca74ccce..0834c9db1 100644
--- a/acorn/src/index.js
+++ b/acorn/src/index.js
@@ -54,6 +54,7 @@ export {
 }
 
 Parser.acorn = {
+  Parser,
   version,
   defaultOptions,
   Position,

From df0cf1a3e2b1a51a26c14984dc0f5412b7151b10 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Tue, 26 Nov 2019 23:12:13 +0100
Subject: [PATCH 35/37] Mark version 6.4.0

---
 acorn/CHANGELOG.md | 6 ++++++
 acorn/package.json | 2 +-
 acorn/src/index.js | 2 +-
 3 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/acorn/CHANGELOG.md b/acorn/CHANGELOG.md
index 6b71c9899..1438da677 100644
--- a/acorn/CHANGELOG.md
+++ b/acorn/CHANGELOG.md
@@ -1,3 +1,9 @@
+## 6.4.0 (2019-11-26)
+
+### New features
+
+Add a static `acorn` property to the `Parser` class that contains the entire module interface, to allow plugins to access the instance of the library that they are acting on.
+
 ## 6.3.0 (2019-08-12)
 
 ### New features
diff --git a/acorn/package.json b/acorn/package.json
index 480ea2d25..f862c38b6 100644
--- a/acorn/package.json
+++ b/acorn/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn.js",
   "module": "dist/acorn.mjs",
-  "version": "6.3.0",
+  "version": "6.4.0",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {
diff --git a/acorn/src/index.js b/acorn/src/index.js
index 0834c9db1..506a989dd 100644
--- a/acorn/src/index.js
+++ b/acorn/src/index.js
@@ -31,7 +31,7 @@ import {isIdentifierChar, isIdentifierStart} from "./identifier"
 import {Token} from "./tokenize"
 import {isNewLine, lineBreak, lineBreakG, nonASCIIwhitespace} from "./whitespace"
 
-export const version = "6.3.0"
+export const version = "6.4.0"
 export {
   Parser,
   defaultOptions,

From 90a9548ea0ce351b54f956e2c4ed27cca9631284 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Sun, 1 Mar 2020 13:32:19 +0100
Subject: [PATCH 36/37] More rigorously check surrogate pairs in regexp
 validator

---
 acorn/src/regexp.js  | 8 +++++---
 test/tests-regexp.js | 1 +
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/acorn/src/regexp.js b/acorn/src/regexp.js
index ee19bcf55..2fe832b4b 100644
--- a/acorn/src/regexp.js
+++ b/acorn/src/regexp.js
@@ -50,7 +50,8 @@ export class RegExpValidationState {
     if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
       return c
     }
-    return (c << 10) + s.charCodeAt(i + 1) - 0x35FDC00
+    const next = s.charCodeAt(i + 1)
+    return next >= 0xDC00 && next <= 0xDFFF ? (c << 10) + next - 0x35FDC00 : c
   }
 
   nextIndex(i) {
@@ -59,8 +60,9 @@ export class RegExpValidationState {
     if (i >= l) {
       return l
     }
-    const c = s.charCodeAt(i)
-    if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l) {
+    let c = s.charCodeAt(i), next
+    if (!this.switchU || c <= 0xD7FF || c >= 0xE000 || i + 1 >= l ||
+        (next = s.charCodeAt(i + 1)) < 0xDC00 || next > 0xDFFF) {
       return i + 1
     }
     return i + 2
diff --git a/test/tests-regexp.js b/test/tests-regexp.js
index 6c4719486..804e00a59 100644
--- a/test/tests-regexp.js
+++ b/test/tests-regexp.js
@@ -1049,6 +1049,7 @@ test("/[\\d][\\12-\\14]{1,}[^\\d]/", {}, { ecmaVersion: 2015 })
 testFail("/[\\d][\\12-\\14]{1,}[^\\d]/u", "Invalid regular expression flag (1:1)", { ecmaVersion: 5 })
 testFail("/[\\d][\\12-\\14]{1,}[^\\d]/u", "Invalid regular expression: /[\\d][\\12-\\14]{1,}[^\\d]/: Invalid class escape (1:1)", { ecmaVersion: 2015 })
 test("/([a ]\\b)*\\b/", {}, { ecmaVersion: 5 })
+test("/[x-*]/u".replace("*", String.fromCharCode(0xd800)), {}, {ecmaVersion: 6})
 
 /*
 // This is test case generator.

From 9a2e9b6678e243d66846b91179d650d28453e70c Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijn@haverbeke.nl>
Date: Mon, 9 Mar 2020 11:38:41 +0100
Subject: [PATCH 37/37] Mark version 6.4.1

---
 acorn/package.json | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/acorn/package.json b/acorn/package.json
index f862c38b6..318bed138 100644
--- a/acorn/package.json
+++ b/acorn/package.json
@@ -4,7 +4,7 @@
   "homepage": "https://github.com/acornjs/acorn",
   "main": "dist/acorn.js",
   "module": "dist/acorn.mjs",
-  "version": "6.4.0",
+  "version": "6.4.1",
   "engines": {"node": ">=0.4.0"},
   "maintainers": [
     {