[Webkit-unassigned] [Bug 138360] New: Web Inspector: Stopwatch ASSERT when continuing inspector

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=138360

            Bug ID: 138360
           Summary: Web Inspector: Stopwatch ASSERT when continuing
                    inspector
    Classification: Unclassified
           Product: WebKit
           Version: 528+ (Nightly build)
          Hardware: All
                OS: All
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: joepeck at webkit.org
                CC: burg at cs.washington.edu, graouts at webkit.org,
                    joepeck at webkit.org, timothy at apple.com,
                    webkit-bug-importer at group.apple.com

* SUMMARY
Stopwatch ASSERT when continuing inspector.

* TEST CASE
<script>
try {
    [].x.x
} catch (e) {
    console.log(e);
}
</script>

* STEPS TO REPRODUCE
1. Inspect Test Case
2. Enable Breakpoints on All Exceptions
3. Reload => hits breakpoint
4. Continue
  => ASSERT

ASSERTION FAILED: isnan(m_lastStartTime)
/Users/pecoraro/Build/Debug/usr/local/include/wtf/Stopwatch.h(67) : void WTF::Stopwatch::start()
1   0x116a218b0 WTFCrash
2   0x1165ee0c1 WTF::Stopwatch::start()
3   0x1165ec0da Inspector::InspectorDebuggerAgent::didContinue()
4   0x1165ec13c non-virtual thunk to Inspector::InspectorDebuggerAgent::didContinue()
5   0x11695ad95 Inspector::ScriptDebugServer::dispatchDidContinue(Inspector::ScriptDebugListener*)
6   0x11695b3c5 Inspector::ScriptDebugServer::dispatchFunctionToListeners(WTF::HashSet<Inspector::ScriptDebugListener*, WTF::PtrHash<Inspector::ScriptDebugListener*>, WTF::HashTraits<Inspector::ScriptDebugListener*> > const&, void (Inspector::ScriptDebugServer::*)(Inspector::ScriptDebugListener*))
7   0x11695b2cc Inspector::ScriptDebugServer::dispatchFunctionToListeners(void (Inspector::ScriptDebugServer::*)(Inspector::ScriptDebugListener*))
8   0x11695b66c Inspector::ScriptDebugServer::handlePause(JSC::Debugger::ReasonForPause, JSC::JSGlobalObject*)
9   0x116225500 JSC::Debugger::pauseIfNeeded(JSC::ExecState*)
10  0x11622578c JSC::Debugger::updateCallFrameAndPauseIfNeeded(JSC::ExecState*)
11  0x116225867 JSC::Debugger::exception(JSC::ExecState*, JSC::JSValue, bool)
12  0x11665d185 JSC::Interpreter::unwind(void*&, JSC::ExecState*&, JSC::JSValue&)
13  0x11667d49a JSC::genericUnwind(JSC::VM*, JSC::ExecState*, JSC::JSValue)
14  0x1167e7a9a llint_slow_path_handle_exception
15  0x1167f1201 llint_entry
16  0x1167eca69 vmEntryToJavaScript
17  0x116679e7a JSC::JITCode::execute(JSC::VM*, JSC::ProtoCallFrame*)
18  0x11665e6b4 JSC::Interpreter::execute(JSC::ProgramExecutable*, JSC::ExecState*, JSC::JSObject*)
19  0x1161fe3a0 JSC::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*)
20  0x119051845 WebCore::JSMainThreadExecState::evaluate(JSC::ExecState*, JSC::SourceCode const&, JSC::JSValue, JSC::JSValue*)
21  0x119a3307d WebCore::ScriptController::evaluateInWorld(WebCore::ScriptSourceCode const&, WebCore::DOMWrapperWorld&)
22  0x119a331c4 WebCore::ScriptController::evaluate(WebCore::ScriptSourceCode const&)
23  0x119a42817 WebCore::ScriptElement::executeScript(WebCore::ScriptSourceCode const&)
24  0x119a417e0 WebCore::ScriptElement::prepareScript(WTF::TextPosition const&, WebCore::ScriptElement::LegacyTypeSupport)
25  0x118abb0d9 WebCore::HTMLScriptRunner::runScript(WebCore::Element*, WTF::TextPosition const&)
26  0x118abaee9 WebCore::HTMLScriptRunner::execute(WTF::PassRefPtr<WebCore::Element>, WTF::TextPosition const&)

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