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<base href="https://bugs.webkit.org/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - [JSC Debug] ASSERTION FAILED: The Compare should have been eliminated, it is known to be always false."
href="https://bugs.webkit.org/show_bug.cgi?id=160283">160283</a>
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<tr>
<th>Summary</th>
<td>[JSC Debug] ASSERTION FAILED: The Compare should have been eliminated, it is known to be always false.
</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>
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<th>Hardware</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>OS</th>
<td>Unspecified
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
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<th>Severity</th>
<td>Normal
</td>
</tr>
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<th>Priority</th>
<td>P2
</td>
</tr>
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<th>Component</th>
<td>JavaScriptCore
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ryanhaddad@apple.com
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</tr></table>
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<pre>Created <span class=""><a href="attachment.cgi?id=284753" name="attach_284753" title="Crashlog">attachment 284753</a> <a href="attachment.cgi?id=284753&action=edit" title="Crashlog">[details]</a></span>
Crashlog
Intermittent assertion failure seen on Yosemite JSC Debug with regress/script-tests/Float32Array-matrix-mult.js.dfg-eager
<a href="https://build.webkit.org/builders/Apple%20Yosemite%20Debug%20JSC%20%28Tests%29/builds/6555">https://build.webkit.org/builders/Apple%20Yosemite%20Debug%20JSC%20%28Tests%29/builds/6555</a>
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: ASSERTION FAILED: The Compare should have been eliminated, it is known to be always false.
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: !masqueradesAsUndefinedWatchpointIsStillValid() || !isKnownCell(operand.node())
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: /Volumes/Data/slave/yosemite-debug/build/Source/JavaScriptCore/dfg/DFGSpeculativeJIT64.cpp(219) : void JSC::DFG::SpeculativeJIT::nonSpeculativeNonPeepholeCompareNullOrUndefined(JSC::DFG::Edge)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 1 0x10e72ea50 WTFCrash
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 2 0x10ddf12a9 JSC::DFG::SpeculativeJIT::nonSpeculativeNonPeepholeCompareNullOrUndefined(JSC::DFG::Edge)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 3 0x10dd9ff11 JSC::DFG::SpeculativeJIT::compare(JSC::DFG::Node*, JSC::MacroAssemblerX86Common::RelationalCondition, JSC::MacroAssemblerX86Common::DoubleCondition, unsigned long (*)(JSC::ExecState*, long long, long long))
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 4 0x10ddfe2c7 JSC::DFG::SpeculativeJIT::compile(JSC::DFG::Node*)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 5 0x10dd8e1bc JSC::DFG::SpeculativeJIT::compileCurrentBlock()
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 6 0x10dd8e996 JSC::DFG::SpeculativeJIT::compile()
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 7 0x10dc5cc17 JSC::DFG::JITCompiler::compileBody()
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 8 0x10dc60690 JSC::DFG::JITCompiler::compileFunction()
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 9 0x10dd4d2cb JSC::DFG::Plan::compileInThreadImpl(JSC::DFG::LongLivedState&)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 10 0x10dd4be42 JSC::DFG::Plan::compileInThread(JSC::DFG::LongLivedState&, JSC::DFG::ThreadData*)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 11 0x10de8f286 JSC::DFG::Worklist::runThread(JSC::DFG::ThreadData*)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 12 0x10de8cf94 JSC::DFG::Worklist::threadFunction(void*)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 13 0x10e7a1989 WTF::createThread(void (*)(void*), void*, char const*)::$_0::operator()() const
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 14 0x10e7a195d void std::__1::__invoke_void_return_wrapper<void>::__call<WTF::createThread(void (*)(void*), void*, char const*)::$_0&>(WTF::createThread(void (*)(void*), void*, char const*)::$_0&&&)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 15 0x10e7a18fc std::__1::__function::__func<WTF::createThread(void (*)(void*), void*, char const*)::$_0, std::__1::allocator<WTF::createThread(void (*)(void*), void*, char const*)::$_0>, void ()>::operator()()
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 16 0x10ddb546a std::__1::function<void ()>::operator()() const
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 17 0x10e7a055e WTF::threadEntryPoint(void*)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 18 0x10e7a2001 WTF::wtfThreadEntryPoint(void*)
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 19 0x7fff8103905a _pthread_body
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 20 0x7fff81038fd7 _pthread_body
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: 21 0x7fff810363ed thread_start
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: test_script_19003: line 2: 71759 Segmentation fault: 11 ( "$@" ../../../.vm/JavaScriptCore.framework/Resources/jsc --useFTLJIT\=false --useFunctionDotArguments\=true --maxPerThreadStackUsage\=1572864 --thresholdForJITAfterWarmUp\=10 --thresholdForJITSoon\=10 --thresholdForOptimizeAfterWarmUp\=20 --thresholdForOptimizeAfterLongWarmUp\=20 --thresholdForOptimizeSoon\=20 --thresholdForFTLOptimizeAfterWarmUp\=20 --thresholdForFTLOptimizeSoon\=20 --maximumEvalCacheableSourceLength\=150000 Float32Array-matrix-mult.js )
regress/script-tests/Float32Array-matrix-mult.js.dfg-eager: ERROR: Unexpected exit code: 139
FAIL: regress/script-tests/Float32Array-matrix-mult.js.dfg-eager</pre>
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