v4.1.5
When using a foreign libuv loop, context creation may fail after adding handles to the foreign loop... if so, it can no longer deal with the fatal error by unpicking the created context and returning NULL... it has to brazen it out with a half-baked context that has already started the destroy flow and allow the foreign loop to close out the handles the usual way for libuv. https://github.com/warmcat/libwebsockets/issues/2129