8000 [SILGen] Crashed when passing String-returning closure to ObjC · Issue #81986 · swiftlang/swift · GitHub
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[SILGen] Crashed when passing String-returning closure to ObjC #81986

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DataCorrupted opened this issue Jun 4, 2025 · 0 comments
Open

[SILGen] Crashed when passing String-returning closure to ObjC #81986

DataCorrupted opened this issue Jun 4, 2025 · 0 comments < 8000 /span>
Labels
bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. crash Bug: A crash, i.e., an abnormal termination of software triage needed This issue needs more specific labels

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@DataCorrupted
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DataCorrupted commented Jun 4, 2025 •
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Description

When an ObjC function asks a NSString-returning closure as an argument, swift can't pass that closure correctly, and SILGen will crash due to type mismatch: clang importer thinks the closure should return (swift) String, while SILGen type lowering lowers it to (swift) Optional<NSString>

Reproduction

I've put a minimal repro in a PR #81984
Just clone the project following the doc and build and run lit test on a Mac:

 utils/build-script --skip-build-benchmarks   --swift-darwin-supported-archs "$(uname -m)"   --release-debuginfo --swift-disable-dead-stripping   --bootstrapping=hosttools
 utils/run-test --lit ../llvm-project/llvm/utils/lit/lit.py   ../build/Ninja-RelWithDebInfoAssert/swift-macosx-$(uname -m)/test-macosx-$(uname -m)

Stack dump

******************** TEST 'Swift(macosx-arm64) :: ClangImporter/objc_method_with_NSString_clousure.swift' FAILED ********************
Exit Code: 2

Command Output (stderr):
--
RUN: at line 1: rm -rf "/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp" && mkdir -p "/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp"
+ rm -rf /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp
+ mkdir -p /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp
RUN: at line 2: split-file /Users/peterrong/swift-project/swift/test/ClangImporter/objc_method_with_NSString_clousure.swift /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp
+ split-file /Users/peterrong/swift-project/swift/test/ClangImporter/objc_method_with_NSString_clousure.swift /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp
RUN: at line 4: /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend -target arm64-apple-macosx13.0  -module-cache-path /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/swift-test-results/arm64-apple-macosx13.0/clang-module-cache -sdk '/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.5.sdk'  -swift-version 4  -define-availability 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlibCurrentOS 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlibCurrentOS 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlibCurrentOS 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlibCurrentOS 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlibCurrentOS 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlibCurrentOS 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlibCurrentOS 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlibCurrentOS 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlibCurrentOS 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlibCurrentOS 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlibCurrentOS 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlibCurrentOS 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlibCurrentOS 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlib 6.1:macOS 15.4, iOS 18.4, watchOS 11.4, tvOS 18.4, visionOS 2.4' -define-availability 'SwiftStdlibCurrentOS 6.1:macOS 15.4, iOS 18.4, watchOS 11.4, tvOS 18.4, visionOS 2.4' -define-availability 'SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlibCurrentOS 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlib 6.3:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlibCurrentOS 6.3:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftCompatibilitySpan 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1' -define-availability 'SwiftCompatibilitySpan 6.2:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0'  -typo-correction-limit 10  -emit-silgen /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.swift -import-objc-header /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.h | /usr/local/fbcode/platform010/Python3.12.framework/Versions/3.12/bin/python3.12 /Users/peterrong/swift-project/swift/utils/PathSanitizingFileCheck --allow-unused-prefixes --sanitize BUILD_DIR=/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64 --sanitize SOURCE_DIR=/Users/peterrong/swift-project/swift --ignore-runtime-warnings --use-filecheck /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/llvm-macosx-arm64/bin/FileCheck --color  /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.swift
+ /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend -target arm64-apple-macosx13.0 -module-cache-path /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/swift-test-results/arm64-apple-macosx13.0/clang-module-cache -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.5.sdk -swift-version 4 -define-availability 'SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlibCurrentOS 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999' -define-availability 'SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlibCurrentOS 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2' -define-availability 'SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlibCurrentOS 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0' -define-availability 'SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlibCurrentOS 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4' -define-availability 'SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlibCurrentOS 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0' -define-availability 'SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlibCurrentOS 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5' -define-availability 'SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlibCurrentOS 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0' -define-availability 'SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlibCurrentOS 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4' -define-availability 'SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlibCurrentOS 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0' -define-availability 'SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlibCurrentOS 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4' -define-availability 'SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlibCurrentOS 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0' -define-availability 'SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlibCurrentOS 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1' -define-availability 'SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlibCurrentOS 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -define-availability 'SwiftStdlib 6.1:macOS 15.4, iOS 18.4, watchOS 11.4, tvOS 18.4, visionOS 2.4' -define-availability 'SwiftStdlibCurrentOS 6.1:macOS 15.4, iOS 18.4, watchOS 11.4, tvOS 18.4, visionOS 2.4' -define-availability 'SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlibCurrentOS 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlib 6.3:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftStdlibCurrentOS 6.3:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999' -define-availability 'SwiftCompatibilitySpan 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1' -define-availability 'SwiftCompatibilitySpan 6.2:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0' -typo-correction-limit 10 -emit-silgen /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.swift -import-objc-header /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.h
+ /usr/local/fbcode/platform010/Python3.12.framework/Versions/3.12/bin/python3.12 /Users/peterrong/swift-project/swift/utils/PathSanitizingFileCheck --allow-unused-prefixes --sanitize BUILD_DIR=/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64 --sanitize SOURCE_DIR=/Users/peterrong/swift-project/swift --ignore-runtime-warnings --use-filecheck /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/llvm-macosx-arm64/bin/FileCheck --color /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.swift
Assertion failed: (isa<To>(Val) && "cast<Ty>() argument of incompatible type!"), function cast, file Casting.h, line 578.
Please submit a bug report (https://swift.org/contributing/#reporting-bugs) and include the crash backtrace.
Stack dump:
0.      Program arguments: /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend -target arm64-apple-macosx13.0 -module-cache-path /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/swift-test-results/arm64-apple-macosx13.0/clang-module-cache -sdk /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX15.5.sdk -swift-version 4 -define-availability "SwiftStdlib 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999" -define-availability "SwiftStdlibCurrentOS 9999:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999" -define-availability "SwiftStdlib 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2" -define-availability "SwiftStdlibCurrentOS 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2" -define-availability "SwiftStdlib 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0" -define-availability "SwiftStdlibCurrentOS 5.1:macOS 10.15, iOS 13.0, watchOS 6.0, tvOS 13.0" -define-availability "SwiftStdlib 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4" -define-availability "SwiftStdlibCurrentOS 5.2:macOS 10.15.4, iOS 13.4, watchOS 6.2, tvOS 13.4" -define-availability "SwiftStdlib 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0" -define-availability "SwiftStdlibCurrentOS 5.3:macOS 11.0, iOS 14.0, watchOS 7.0, tvOS 14.0" -define-availability "SwiftStdlib 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5" -define-availability "SwiftStdlibCurrentOS 5.4:macOS 11.3, iOS 14.5, watchOS 7.4, tvOS 14.5" -define-availability "SwiftStdlib 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0" -define-availability "SwiftStdlibCurrentOS 5.5:macOS 12.0, iOS 15.0, watchOS 8.0, tvOS 15.0" -define-availability "SwiftStdlib 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4" -define-availability "SwiftStdlibCurrentOS 5.6:macOS 12.3, iOS 15.4, watchOS 8.5, tvOS 15.4" -define-availability "SwiftStdlib 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0" -define-availability "SwiftStdlibCurrentOS 5.7:macOS 13.0, iOS 16.0, watchOS 9.0, tvOS 16.0" -define-availability "SwiftStdlib 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4" -define-availability "SwiftStdlibCurrentOS 5.8:macOS 13.3, iOS 16.4, watchOS 9.4, tvOS 16.4" -define-availability "SwiftStdlib 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0" -define-availability "SwiftStdlibCurrentOS 5.9:macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0" -define-availability "SwiftStdlib 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1" -define-availability "SwiftStdlibCurrentOS 5.10:macOS 14.4, iOS 17.4, watchOS 10.4, tvOS 17.4, visionOS 1.1" -define-availability "SwiftStdlib 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0" -define-availability "SwiftStdlibCurrentOS 6.0:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0" -define-availability "SwiftStdlib 6.1:macOS 15.4, iOS 18.4, watchOS 11.4, tvOS 18.4, visionOS 2.4" -define-availability "SwiftStdlibCurrentOS 6.1:macOS 15.4, iOS 18.4, watchOS 11.4, tvOS 18.4, visionOS 2.4" -define-availability "SwiftStdlib 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999" -define-availability "SwiftStdlibCurrentOS 6.2:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999" -define-availability "SwiftStdlib 6.3:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999" -define-availability "SwiftStdlibCurrentOS 6.3:macOS 9999, iOS 9999, watchOS 9999, tvOS 9999, visionOS 9999" -define-availability "SwiftCompatibilitySpan 5.0:macOS 10.14.4, iOS 12.2, watchOS 5.2, tvOS 12.2, visionOS 1.1" -define-availability "SwiftCompatibilitySpan 6.2:macOS 15.0, iOS 18.0, watchOS 11.0, tvOS 18.0, visionOS 2.0" -typo-correction-limit 10 -emit-silgen /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.swift -import-objc-header /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.h
1.      Swift version 6.2-dev (LLVM 16bde63b522abaa, Swift 809fdd9505d033e)
2.      Compiling with effective version 4.1.50
3.      While evaluating request ASTLoweringRequest(Lowering AST to SIL for module Theme)
4.      While silgen emitValueConstructor SIL function "@$sSo14ThemeFuncTableV9keyGetterABSSyXC_tcfC".
 for 'init(keyGetter:)' (at /Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/test-macosx-arm64/ClangImporter/Output/objc_method_with_NSString_clousure.swift.tmp/Theme.h:3:16)
 #0 0x0000000109f088f0 llvm::sys::PrintStackTrace(llvm::raw_ostream&, int) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x105bd48f0)
 #1 0x0000000109f06dfc llvm::sys::RunSignalHandlers() (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x105bd2dfc)
 #2 0x0000000109f08f48 SignalHandler(int, __siginfo*, void*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x105bd4f48)
 #3 0x000000019fc7c624 (/usr/lib/system/libsystem_platform.dylib+0x1804ac624)
 #4 0x000000019fc4288c (/usr/lib/system/libsystem_pthread.dylib+0x18047288c)
 #5 0x000000019fb4bc60 (/usr/lib/system/libsystem_c.dylib+0x18037bc60)
 #6 0x000000019fb4aeec (/usr/lib/system/libsystem_c.dylib+0x18037aeec)
 #7 0x0000000109f0af04 findTypeMemberDiffs(swift::ide::api::SDKNode*, swift::ide::api::SDKNode*, std::__1::vector<swift::ide::api::TypeMemberDiffItem, std::__1::allocator<swift::ide::api::TypeMemberDiffItem>>&) (.cold.2) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x105bd6f04)
 #8 0x0000000104b437e8 hasReferenceSemantics((anonymous namespace)::IRGenSILFunction&, swift::SILType) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x10080f7e8)
 #9 0x0000000104ca6024 swift::Lowering::SILGenFunction::emitConversionFromSemanticValue(swift::SILLocation, swift::SILValue, swift::SILType) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x100972024)
#10 0x0000000104be10d4 swift::Lowering::RValue::forwardAsSingleStorageValue(swift::Lowering::SILGenFunction&, swift::SILType, swift::SILLocation) && (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1008ad0d4)
#11 0x0000000104c37144 swift::Lowering::SILGenFunction::emitValueConstructor(swift::ConstructorDecl*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x100903144)
#12 0x0000000104bef9ec swift::Lowering::SILGenModule::emitFunctionDefinition(swift::SILDeclRef, swift::SILFunction*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1008bb9ec)
#13 0x0000000104bf3954 swift::ASTLoweringRequest::evaluate(swift::Evaluator&, swift::ASTLoweringDescriptor) const (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1008bf954)
#14 0x0000000104cea874 swift::SimpleRequest<swift::ASTLoweringRequest, std::__1::unique_ptr<swift::SILModule, std::__1::default_delete<swift::SILModule>> (swift::ASTLoweringDescriptor), (swift::RequestFlags)17>::evaluateRequest(swift::ASTLoweringRequest const&, swift::Evaluator&) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1009b6874)
#15 0x0000000104bf70c0 swift::ASTLoweringRequest::OutputType swift::Evaluator::getResultUncached<swift::ASTLoweringRequest, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()>(swift::ASTLoweringRequest const&, swift::ASTLoweringRequest::OutputType swift::evaluateOrFatal<swift::ASTLoweringRequest>(swift::Evaluator&, swift::ASTLoweringRequest)::'lambda'()) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1008c30c0)
#16 0x0000000104bf3ac0 swift::performASTLowering(swift::ModuleDecl*, swift::Lowering::TypeConverter&, swift::SILOptions const&, swift::IRGenOptions const*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1008bfac0)
#17 0x00000001045c5670 swift::performCompileStepsPostSema(swift::CompilerInstance&, int&, swift::FrontendObserver*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x100291670)
#18 0x00000001045d151c withSemanticAnalysis(swift::CompilerInstance&, swift::FrontendObserver*, llvm::function_ref<bool (swift::CompilerInstance&)>, bool) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x10029d51c)
#19 0x00000001045c7058 performCompile(swift::CompilerInstance&, int&, swift::FrontendObserver*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x100293058)
#20 0x00000001045c68d4 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, swift::FrontendObserver*) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x1002928d4)
#21 0x000000010436bf00 swift::mainEntry(int, char const**) (/Users/peterrong/swift-project/build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend+0x100037f00)
#22 0x000000019f8a2b98

Expected behavior

Builds correctly

Environment

~/swift-project/swift$ ../build/Ninja-RelWithDebInfoAssert/swift-macosx-arm64/bin/swift-frontend -version
Swift version 6.2-dev (LLVM 16bde63b522abaa, Swift 809fdd9505d033e)
Target: arm64-apple-macosx15.0
Build config: +assertions

Additional information

No response
@DataCorrupted DataCorrupted added bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. crash Bug: A crash, i.e., an abnormal termination of software triage needed This issue needs more specific labels labels Jun 4, 2025
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. crash Bug: A crash, i.e., an abnormal termination of software triage needed This issue needs more specific labels
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