[Webkit-unassigned] [Bug 200678] New: REGRESSION (r248532-r248544): ASSERTION FAILED: mainThreadPthread in WTF::isMainThread()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=200678

            Bug ID: 200678
           Summary: REGRESSION (r248532-r248544): ASSERTION FAILED:
                    mainThreadPthread in WTF::isMainThread()
           Product: WebKit
           Version: Other
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: ryanhaddad at apple.com

** The following JSC stress test failures have been introduced:
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.bytecode-cache
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.default
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.dfg-eager
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.dfg-eager-no-cjit-validate
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.dfg-maximal-flush-validate-no-cjit
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-eager
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-eager-no-cjit
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-eager-no-cjit-b3o1
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-no-cjit-b3o0
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-no-cjit-no-inline-validate
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-no-cjit-no-put-stack-validate
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-no-cjit-small-pool
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.ftl-no-cjit-validate-sampling-profiler
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.mini-mode
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.no-cjit-validate-phases
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.no-ftl
        stress/dfg-scan-inlined-tail-caller-frames-liveness.js.no-llint

ASSERTION FAILED: mainThreadPthread
/Volumes/Data/slave/highsierra-debug/build/Source/WTF/wtf/cocoa/MainThreadCocoa.mm(231) : bool WTF::isMainThread()
1   0x10f6b26e9 WTFCrash
2   0x10f6b56cb WTFCrashWithInfo(int, char const*, char const*, int)
3   0x10f715312 WTF::isMainThread()
4   0x10f6e0b9f WTF::RefCountedBase::RefCountedBase()
5   0x10f6e0b75 WTF::RefCounted<WTF::CStringBuffer, std::__1::default_delete<WTF::CStringBuffer> >::RefCounted()
6   0x10f6e0b40 WTF::CStringBuffer::CStringBuffer(unsigned long)
7   0x10f6e011d WTF::CStringBuffer::CStringBuffer(unsigned long)
8   0x10f6e001e WTF::CStringBuffer::createUninitialized(unsigned long)
9   0x10f6e022e WTF::CString::init(char const*, unsigned long)
10  0x10f6e0360 WTF::CString::CString(char const*, unsigned long)
11  0x10f6e0395 WTF::CString::CString(char const*, unsigned long)
12  0x10f75e841 WTF::StringImpl::tryGetUtf8ForRange(unsigned int, unsigned int, WTF::ConversionMode) const
13  0x10f75e8cf WTF::StringImpl::tryGetUtf8(WTF::ConversionMode) const
14  0x10f7c7e33 WTF::String::tryGetUtf8(WTF::ConversionMode) const
15  0x10f7c7edd WTF::String::utf8(WTF::ConversionMode) const
16  0x10f7c7f8e WTF::String::utf8() const
17  0x110e1e7e8 JSC::Options::setAliasedOption(char const*)
18  0x110e0c916 JSC::Options::setOption(char const*)
19  0x10f583d50 CommandLine::parseArguments(int, char**)
20  0x10f59ec43 CommandLine::CommandLine(int, char**)
21  0x10f5844f3 CommandLine::CommandLine(int, char**)
22  0x10f58334e jscmain(int, char**)
23  0x10f58330e main
24  0x7fff54f22015 start
25  0xb

https://build.webkit.org/builders/Apple%20High%20Sierra%20Debug%20JSC%20%28Tests%29/builds/3429

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