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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 - REGRESSION(r192436): Inspector Hanging under tryParseDestructuringPatternExpression"
href="https://bugs.webkit.org/show_bug.cgi?id=151324">151324</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>REGRESSION(r192436): Inspector Hanging under tryParseDestructuringPatternExpression
</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>joepeck@webkit.org
</td>
</tr>
<tr>
<th>CC</th>
<td>caitpotter88@gmail.com, ggaren@apple.com, sbarati@apple.com
</td>
</tr></table>
<p>
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<pre>* SUMMARY
Inspector Hanging under tryParseDestructuringPatternExpression.
* STEPS TO REPRODUCE
1. Inspect <<a href="http://bogojoker.com/shell/">http://bogojoker.com/shell/</a>>
2. Show Timeline Tab
3. Reload
=> Timeline starts a bit, then hangs completely
* NOTES
- Sample shows stuck under tryParseDestructuringPatternExpression:
<span class="quote">> 8033 void IPC::handleMessage<Messages::WebInspectorUI::SendMessageToFrontend, WebKit::WebInspectorUI, void (WebKit::WebInspectorUI::*)(WTF::String const&)>(IPC::MessageDecoder&, WebKit::WebInspectorUI*, void (WebKit::WebInspectorUI::*)(WTF::String const&)) (in WebKit) + 67 [0x10e37e1f7] HandleMessage.h:16
> 8033 WebKit::WebInspectorFrontendAPIDispatcher::dispatchMessageAsync(WTF::String const&) (in WebKit) + 72 [0x10e3761c0] WebInspectorFrontendAPIDispatcher.cpp:76
> 8033 WebKit::WebInspectorFrontendAPIDispatcher::evaluateExpressionOnLoad(WTF::String const&) (in WebKit) + 59 [0x10e375fd1] WebInspectorFrontendAPIDispatcher.cpp:83
> 8033 WebCore::ScriptController::executeScript(WTF::String const&, bool, WebCore::ExceptionDetails*) (in WebCore) + 343 [0x110a049a7] ScriptController.cpp:180
> 8033 WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld&, WebCore::ExceptionDetails*) (in WebCore) + 304 [0x110a02ca0] JSMainThreadExecState.h:62
> 8033 JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, WTF::NakedPtr<JSC::Exception>&) (in JavaScriptCore) + 469 [0x10f11ca75] Completion.cpp:104
> 8033 JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*) (in JavaScriptCore) + 10276 [0x10f441114] Interpreter.cpp:938
> 8033 JSC::ProgramExecutable::initializeGlobalProperties(JSC::VM&, JSC::ExecState*, JSC::JSScope*) (in JavaScriptCore) + 106 [0x10f32f47a] Executable.cpp:574
> 8033 JSC::JSGlobalObject::createProgramCodeBlock(JSC::ExecState*, JSC::ProgramExecutable*, JSC::JSObject**) (in JavaScriptCore) + 205 [0x10f4dafbd] JSGlobalObject.cpp:935
> 8033 JSC::CodeCache::getProgramCodeBlock(JSC::VM&, JSC::ProgramExecutable*, JSC::SourceCode const&, JSC::JSParserBuiltinMode, JSC::JSParserStrictMode, JSC::DebuggerMode, JSC::ProfilerMode, JSC::ParserError&) (in JavaScriptCore) + 82 [0x10f0f6a52] CodeCache.cpp:135
> 8033 JSC::UnlinkedProgramCodeBlock* JSC::CodeCache::getGlobalCodeBlock<JSC::UnlinkedProgramCodeBlock, JSC::ProgramExecutable>(JSC::VM&, JSC::ProgramExecutable*, JSC::SourceCode const&, JSC::JSParserBuiltinMode, JSC::JSParserStrictMode, JSC::ThisTDZMode, JSC::DebuggerMode, JSC::ProfilerMode, JSC::ParserError&, JSC::VariableEnvironment const*) (in JavaScriptCore) + 225 [0x10f0f71d1] CodeCache.cpp:104
> 8033 std::__1::unique_ptr<JSC::ProgramNode, std::__1::default_delete<JSC::ProgramNode> > JSC::parse<JSC::ProgramNode>(JSC::VM*, JSC::SourceCode const&, JSC::Identifier const&, JSC::JSParserBuiltinMode, JSC::JSParserStrictMode, JSC::SourceParseMode, JSC::ParserError&, JSC::JSTextPosition*, JSC::ConstructorKind, JSC::ThisTDZMode) (in JavaScriptCore) + 306 [0x10f0a7ae2] Parser.h:1428
> 8033 std::__1::unique_ptr<JSC::ProgramNode, std::__1::default_delete<JSC::ProgramNode> > JSC::Parser<JSC::Lexer<unsigned char> >::parse<JSC::ProgramNode>(JSC::ParserError&, JSC::Identifier const&, JSC::SourceParseMode) (in JavaScriptCore) + 96 [0x10f0a7d40] Parser.h:1342
> 8033 JSC::Parser<JSC::Lexer<unsigned char> >::parseInner(JSC::Identifier const&, JSC::SourceParseMode) Parser.cpp:275
> 8033 JSC::ASTBuilder::SourceElements JSC::Parser<JSC::Lexer<unsigned char> >::parseSourceElements<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::SourceElementsMode) Parser.cpp:377
> 8033 JSC::ASTBuilder::Statement JSC::Parser<JSC::Lexer<unsigned char> >::parseStatementListItem<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::Identifier const*&, unsigned int*) Parser.cpp:499
> 8033 JSC::ASTBuilder::Statement JSC::Parser<JSC::Lexer<unsigned char> >::parseStatement<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::Identifier const*&, unsigned int*) Parser.cpp:1532
> 8033 JSC::ASTBuilder::Statement JSC::Parser<JSC::Lexer<unsigned char> >::parseExpressionOrLabelStatement<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:2150
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:2691
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3700
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3486
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3700
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3128
> 8033 JSC::ASTBuilder::Property JSC::Parser<JSC::Lexer<unsigned char> >::parseProperty<JSC::ASTBuilder>(JSC::ASTBuilder&, bool) Parser.cpp:2948
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:2727
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::tryParseDestructuringPatternExpression<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::AssignmentContext) Parser.cpp:771
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::parseDestructuringPattern<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::DestructuringKind, JSC::Parser<JSC::Lexer<unsigned char> >::ExportType, JSC::Identifier const**, bool*, JSC::AssignmentContext, int) Parser.cpp:913
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentElement<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::DestructuringKind, JSC::Parser<JSC::Lexer<unsigned char> >::ExportType, JSC::Identifier const**, bool*, JSC::AssignmentContext, int) Parser.cpp:793
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3128
> 8033 JSC::ASTBuilder::Property JSC::Parser<JSC::Lexer<unsigned char> >::parseProperty<JSC::ASTBuilder>(JSC::ASTBuilder&, bool) Parser.cpp:2948
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3700
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3255
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3700
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3128
> 8033 JSC::ASTBuilder::Property JSC::Parser<JSC::Lexer<unsigned char> >::parseProperty<JSC::ASTBuilder>(JSC::ASTBuilder&, bool) Parser.cpp:2948
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:2727
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::tryParseDestructuringPatternExpression<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::AssignmentContext) Parser.cpp:771
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::parseDestructuringPattern<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::DestructuringKind, JSC::Parser<JSC::Lexer<unsigned char> >::ExportType, JSC::Identifier const**, bool*, JSC::AssignmentContext, int) Parser.cpp:845
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentElement<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::DestructuringKind, JSC::Parser<JSC::Lexer<unsigned char> >::ExportType, JSC::Identifier const**, bool*, JSC::AssignmentContext, int) Parser.cpp:793
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3128
> 8033 JSC::ASTBuilder::Property JSC::Parser<JSC::Lexer<unsigned char> >::parseProperty<JSC::ASTBuilder>(JSC::ASTBuilder&, bool) Parser.cpp:2948
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3700
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseMemberExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:3128
> 8033 JSC::ASTBuilder::Property JSC::Parser<JSC::Lexer<unsigned char> >::parseProperty<JSC::ASTBuilder>(JSC::ASTBuilder&, bool) Parser.cpp:2948
> 8033 JSC::ASTBuilder::Expression JSC::Parser<JSC::Lexer<unsigned char> >::parseAssignmentExpression<JSC::ASTBuilder>(JSC::ASTBuilder&) Parser.cpp:2727
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::tryParseDestructuringPatternExpression<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::AssignmentContext) Parser.cpp:771
> 8033 JSC::ASTBuilder::DestructuringPattern JSC::Parser<JSC::Lexer<unsigned char> >::parseDestructuringPattern<JSC::ASTBuilder>(JSC::ASTBuilder&, JSC::DestructuringKind, JSC::Parser<JSC::Lexer<unsigned char> >::ExportType, JSC::Identifier const**, bool*, JSC::AssignmentContext, int) Parser.cpp:913
>
> ...</span ></pre>
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