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<base href="https://bugs.webkit.org/" />
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - Assertion failure: !isCompilationThread() || !isAtomic() in StringImpl::ref()"
href="https://bugs.webkit.org/show_bug.cgi?id=155225">155225</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>Assertion failure: !isCompilationThread() || !isAtomic() in StringImpl::ref()
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr>
<tr>
<th>Product</th>
<td>WebKit
</td>
</tr>
<tr>
<th>Version</th>
<td>WebKit Nightly Build
</td>
</tr>
<tr>
<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>Normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P2
</td>
</tr>
<tr>
<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>rniwa@webkit.org
</td>
</tr></table>
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<pre>DFG Worklist Worker Thread (14)#0 0x0000000101422f17 in ::WTFCrash() at /Volumes/Data/webkit2/Source/WTF/wtf/Assertions.cpp:322
#1 0x00000001005da4f0 in WTF::StringImpl::ref() at /Volumes/Data/webkit2/WebKitBuild/Debug/usr/local/include/wtf/text/StringImpl.h:588
#2 0x00000001005edf53 in WTF::Ref<WTF::StringImpl>::Ref(WTF::StringImpl&) at /Volumes/Data/webkit2/WebKitBuild/Debug/usr/local/include/wtf/Ref.h:62
#3 0x00000001005edb9d in WTF::Ref<WTF::StringImpl>::Ref(WTF::StringImpl&) at /Volumes/Data/webkit2/WebKitBuild/Debug/usr/local/include/wtf/Ref.h:61
#4 0x000000010147fbf6 in WTF::Ref<WTF::StringImpl> WTF::StringImpl::createInternal<unsigned char>(unsigned char const*, unsigned int) at /Volumes/Data/webkit2/Source/WTF/wtf/text/StringImpl.cpp:244
#5 0x0000000101476862 in WTF::StringImpl::create(unsigned char const*, unsigned int) at /Volumes/Data/webkit2/Source/WTF/wtf/text/StringImpl.cpp:259
#6 0x0000000100a086a1 in WTF::StringImpl::isolatedCopy() const at /Volumes/Data/webkit2/WebKitBuild/Debug/usr/local/include/wtf/text/StringImpl.h:1160
#7 0x0000000100a07667 in JSC::DFG::LazyJSValue::tryGetString(JSC::DFG::Graph&) const at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGLazyJSValue.cpp:124
#8 0x000000010099d66c in JSC::DFG::FrozenValue::tryGetString(JSC::DFG::Graph&) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGFrozenValue.cpp:44
#9 0x0000000100a42441 in JSC::DFG::Node::tryGetString(JSC::DFG::Graph&) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGNode.cpp:207
#10 0x0000000100bb72cf in JSC::DFG::StrengthReductionPhase::handleNode() at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGStrengthReductionPhase.cpp:302
#11 0x0000000100bb5fd8 in JSC::DFG::StrengthReductionPhase::run() at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGStrengthReductionPhase.cpp:63
#12 0x0000000100bb5de5 in bool JSC::DFG::runAndLog<JSC::DFG::StrengthReductionPhase>(JSC::DFG::StrengthReductionPhase&) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGPhase.h:80
#13 0x0000000100bb5d6e in bool JSC::DFG::runPhase<JSC::DFG::StrengthReductionPhase>(JSC::DFG::Graph&) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGPhase.h:90
#14 0x0000000100bb5cd8 in JSC::DFG::performStrengthReduction(JSC::DFG::Graph&) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGStrengthReductionPhase.cpp:394
#15 0x0000000100ad4ea9 in JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGPlan.cpp:302
#16 0x0000000100ad401d in JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGPlan.cpp:184
#17 0x0000000100bebbca in JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGWorklist.cpp:369
#18 0x0000000100be9f24 in JSC::DFG::Worklist::threadFunction(void*) at /Volumes/Data/webkit2/Source/JavaScriptCore/dfg/DFGWorklist.cpp:411
#19 0x000000010148e039 in WTF::createThread(void (*)(void*), void*, char const*)::$_0::operator()() const at /Volumes/Data/webkit2/Source/WTF/wtf/Threading.cpp:81
#20 0x000000010148e00d in decltype(std::__1::forward<WTF::createThread(void (*)(void*), void*, char const*)::$_0&>(fp)(std::__1::forward<>(fp0))) std::__1::__invoke<WTF::createThread(void (*)(void*), void*, char const*)::$_0&>(WTF::createThread(void (*)(void*), void*, char const*)::$_0&&&) [inlined] at /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__functional_base:415
#21 0x000000010148dffc in void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::createThread(void (*)(void*), void*, char const*)::$_0&>(WTF::createThread(void (*)(void*), void*, char const*)::$_0&&&) at /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/__functional_base:440
#22 0x000000010148dfac in std::__1::__function::__func<WTF::createThread(void (*)(void*), void*, char const*)::$_0, std::__1::allocator<WTF::createThread(void (*)(void*), void*, char const*)::$_0>, void ()>::operator()() at /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1407
#23 0x0000000100d345ba in std::__1::function<void ()>::operator()() const at /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/../include/c++/v1/functional:1793
#24 0x000000010148cd0e in WTF::threadEntryPoint(void*) at /Volumes/Data/webkit2/Source/WTF/wtf/Threading.cpp:58
#25 0x000000010148e5a1 in WTF::wtfThreadEntryPoint(void*) at /Volumes/Data/webkit2/Source/WTF/wtf/ThreadingPthreads.cpp:164
#26 0x000000010e77d805 in _pthread_body ()
#27 0x000000010e77d782 in _pthread_start ()
#28 0x000000010e77afa1 in thread_start ()</pre>
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