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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 - ASSERTION FAILED: m_items.isEmpty()"
href="https://bugs.webkit.org/show_bug.cgi?id=162029">162029</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ASSERTION FAILED: m_items.isEmpty()
</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>New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>webkit-unassigned@lists.webkit.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>ryanhaddad@apple.com
</td>
</tr></table>
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<pre>Encountered on iOS 10 WK2 with LayoutTest fast/custom-elements/attribute-changed-callback.html
<a href="https://build.webkit.org/results/Apple%20iOS%2010%20Simulator%20Debug%20WK2%20(Tests)/r205989%20(50)/results.html">https://build.webkit.org/results/Apple%20iOS%2010%20Simulator%20Debug%20WK2%20(Tests)/r205989%20(50)/results.html</a>
ASSERTION FAILED: m_items.isEmpty()
/Volumes/Data/slave/ios-simulator-10-debug/build/Source/WebCore/dom/CustomElementReactionQueue.cpp(114) : WebCore::CustomElementReactionQueue::~CustomElementReactionQueue()
1 0x10d74896d WTFCrash
2 0x10fb2eef9 WebCore::CustomElementReactionQueue::~CustomElementReactionQueue()
3 0x10fb2ef85 WebCore::CustomElementReactionQueue::~CustomElementReactionQueue()
4 0x10fb2fe05 WebCore::CustomElementReactionStack::processQueue()
5 0x1105a4985 WebCore::CustomElementReactionStack::~CustomElementReactionStack()
6 0x1105a3c55 WebCore::CustomElementReactionStack::~CustomElementReactionStack()
7 0x11071cb6e WebCore::jsElementPrototypeFunctionSetAttribute(JSC::ExecState*)
8 0x4bb236de028
9 0x10d44dbc5 llint_entry
10 0x10d44e00d llint_entry
11 0x10d44db4b llint_entry
12 0x10d44dbc5 llint_entry
13 0x10d446b9e vmEntryToJavaScript
14 0x10d254339 JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
15 0x10d1fc794 JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*)
16 0x10cc9367d JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&)
17 0x10cc9384e JSC::profiledEvaluate(JSC::ExecState*, JSC::ProfilingReason, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&)
18 0x11152a32b WebCore::JSMainThreadExecState::profiledEvaluate(JSC::ExecState*, JSC::ProfilingReason, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&)
19 0x11152a128 WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld&, WebCore::ExceptionDetails*)
20 0x11152a40d WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&, WebCore::ExceptionDetails*)
21 0x111538c4b WebCore::ScriptElement::executeScript(WebCore::ScriptSourceCode const&)
22 0x111537ae9 WebCore::ScriptElement::prepareScript(WTF::TextPosition const&, WebCore::ScriptElement::LegacyTypeSupport)
23 0x1101d78d1 WebCore::HTMLScriptRunner::runScript(WebCore::Element*, WTF::TextPosition const&)
24 0x1101d76ea WebCore::HTMLScriptRunner::execute(WTF::PassRefPtr<WebCore::Element>, WTF::TextPosition const&)
25 0x110102988 WebCore::HTMLDocumentParser::runScriptsForPausedTreeBuilder()
26 0x110102e03 WebCore::HTMLDocumentParser::pumpTokenizerLoop(WebCore::HTMLDocumentParser::SynchronousMode, bool, WebCore::PumpSession&)
27 0x110101ac8 WebCore::HTMLDocumentParser::pumpTokenizer(WebCore::HTMLDocumentParser::SynchronousMode)
28 0x11010161b WebCore::HTMLDocumentParser::pumpTokenizerIfPossible(WebCore::HTMLDocumentParser::SynchronousMode)
29 0x1101040d6 WebCore::HTMLDocumentParser::append(WTF::RefPtr<WTF::StringImpl>&&)
30 0x10fba3972 WebCore::DecodedDataDocumentParser::appendBytes(WebCore::DocumentWriter&, char const*, unsigned long)
31 0x10fcd92e9 WebCore::DocumentWriter::addData(char const*, unsigned long)
LEAK: 1 WebProcessPool</pre>
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