Bug 273460 – Regression(278082@main) Crash under WKStringCopyCFString()

• Status: RESOLVED
• Resolution: FIXED
• Component: WebKit2

[Chris Dumez]

Crash under WKStringCopyCFString():
```
 Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0  libsystem_kernel.dylib                   	       0x184d3ea40        __pthread_kill + 8
1  libsystem_pthread.dylib                  	       0x184d76c20        pthread_kill + 288 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/libpthread/src/pthread.c:1721
2  libsystem_c.dylib                        	       0x184c83a30        abort + 180 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/Libc/stdlib/FreeBSD/abort.c:118
3  libclang_rt.asan_osx_dynamic.dylib       	       0x1012035b0        __sanitizer::Abort() + 68 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/clang_compiler_rt/compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp:143
4  libclang_rt.asan_osx_dynamic.dylib       	       0x101202ca0        __sanitizer::Die() + 212 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/clang_compiler_rt/compiler-rt/lib/sanitizer_common/sanitizer_termination.cpp:58
5  libclang_rt.asan_osx_dynamic.dylib       	       0x1011e6c84        __asan::ScopedInErrorReport::~ScopedInErrorReport() + 1124 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/clang_compiler_rt/compiler-rt/lib/asan/asan_report.cpp:192
6  libclang_rt.asan_osx_dynamic.dylib       	       0x1011e5f54        __asan::ScopedInErrorReport::~ScopedInErrorReport() + 8 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/clang_compiler_rt/compiler-rt/lib/asan/asan_report.cpp:137 [inlined]
7  libclang_rt.asan_osx_dynamic.dylib       	       0x1011e5f54        __asan::ReportGenericError(unsigned long, unsigned long, unsigned long, unsigned long, bool, unsigned long, unsigned int, bool) + 1464 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/clang_compiler_rt/compiler-rt/lib/asan/asan_report.cpp:485
8  libclang_rt.asan_osx_dynamic.dylib       	       0x1011a63b4        wrap_memcpy + 1060 /AppleInternal/Library/BuildRoots/ddd53e03-ee47-11ee-a05f-a65dcee5a99e/Library/Caches/com.apple.xbs/Sources/clang_compiler_rt/compiler-rt/lib/asan/../sanitizer_common/sanitizer_common_interceptors.inc:901
9  com.apple.CoreFoundation                 	       0x184ddb928        __CFStringCreateImmutableFunnel3 + 2444 /Volumes/BuildRootMonorailElectriclavender/Library/Caches/com.apple.xbs/Sources/f81488ba-debd-4435-9542-fd958cd964ea/Foundation-2501/CoreFoundation/String.subproj/CFString.c:1865
10  com.apple.WebKit                         	       0x10e7d0c68        WKStringCopyCFString
11  com.apple.WebKitTestRunner.InjectedBundle	       0x11c7ef3e8        WTR::installFakeHelvetica(OpaqueWKString const*)
12  com.apple.WebKitTestRunner.InjectedBundle	       0x11c87aa28        WTR::TestRunner::installFakeHelvetica(OpaqueJSString*)
13  com.apple.WebKitTestRunner.InjectedBundle	       0x11c867440        WTR::JSTestRunner::installFakeHelvetica(OpaqueJSContext const*, OpaqueJSValue*, OpaqueJSValue*, unsigned long, OpaqueJSValue const* const*, OpaqueJSValue const**)
14  com.apple.JavaScriptCore                 	       0x12300726c        long long JSC::APICallbackFunction::callImpl<JSC::JSCallbackFunction>(JSC::JSGlobalObject*, JSC::CallFrame*)

```

[Chris Dumez]

<rdar://127262671>

[Chris Dumez]

Pull request: https://github.com/WebKit/WebKit/pull/27915

[EWS]

Committed 278147@main (d9f5208cd393): <https://commits.webkit.org/278147@main>

Reviewed commits have been landed. Closing PR #27915 and removing active labels.