[Webkit-unassigned] [Bug 173846] New: ASSERT(m_state == State::Active || m_state == State::Canceled) fails in AsyncStackTrace::didDispatchAsyncCall()

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=173846

            Bug ID: 173846
           Summary: ASSERT(m_state == State::Active || m_state ==
                    State::Canceled) fails in
                    AsyncStackTrace::didDispatchAsyncCall()
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Macintosh
                OS: macOS 10.13
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Web Inspector
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: dbates at webkit.org
                CC: inspector-bugzilla-changes at group.apple.com,
                    joepeck at webkit.org, mattbaker at apple.com

MiniBrowser (WK1) crashed because the assertion ASSERT(m_state == State::Active || m_state == State::Canceled) failed in AsyncStackTrace::didDispatchAsyncCall(). I hit this assertion while having the inspector open, waiting until the page <http://www.newsweek.com/portland-stabbing-trump-responds-public-outcry-617076?spMailingID=1907309&spUserID=MzQ4OTUzNjk0MzcS1&spJobID=791102629&spReportId=NzkxMTAyNjI5S0> caused JavaScript error "Unhandled Promise Rejection: TypeError: null is not an object (evaluating 'a.className')", and then selecting this error, expanding it, and copying it to the clipboard.

#0      0x0000000111cce1e4 in ::WTFCrash() at /Volumes/.../OpenSource/Source/WTF/wtf/Assertions.cpp:293
#1      0x0000000110b5a6f4 in Inspector::AsyncStackTrace::didDispatchAsyncCall() at /Volumes/.../OpenSource/Source/JavaScriptCore/inspector/AsyncStackTrace.cpp:76
#2      0x0000000111541e9f in Inspector::InspectorDebuggerAgent::didDispatchAsyncCall() at /Volumes/.../OpenSource/Source/JavaScriptCore/inspector/agents/InspectorDebuggerAgent.cpp:305
#3      0x000000010569e445 in WebCore::InspectorInstrumentation::didFireTimerImpl(WebCore::InspectorInstrumentationCookie const&) at /Volumes/.../OpenSource/Source/WebCore/inspector/InspectorInstrumentation.cpp:469
#4      0x0000000104e52418 in WebCore::InspectorInstrumentation::didFireTimer(WebCore::InspectorInstrumentationCookie const&) at /Volumes/.../OpenSource/Source/WebCore/inspector/InspectorInstrumentation.h:752
#5      0x0000000104e52095 in WebCore::DOMTimer::fired() at /Volumes/.../OpenSource/Source/WebCore/page/DOMTimer.cpp:382
#6      0x00000001070ea9f4 in WebCore::ThreadTimers::sharedTimerFiredInternal() at /Volumes/.../OpenSource/Source/WebCore/platform/ThreadTimers.cpp:118
#7      0x00000001070eb161 in WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::$_0::operator()() const at /Volumes/.../OpenSource/Source/WebCore/platform/ThreadTimers.cpp:70
#8      0x00000001070eb119 in WTF::Function<void ()>::CallableWrapper<WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::$_0>::call() at /Volumes/.../OpenSource/WebKitBuild/Debug/usr/local/include/wtf/Function.h:102
#9      0x000000010464e14e in WTF::Function<void ()>::operator()() const at /Volumes/.../OpenSource/WebKitBuild/Debug/usr/local/include/wtf/Function.h:56
#10     0x00000001063cc925 in WebCore::MainThreadSharedTimer::fired() at /Volumes/.../OpenSource/Source/WebCore/platform/MainThreadSharedTimer.cpp:52
#11     0x00000001063cccb9 in WebCore::timerFired(__CFRunLoopTimer*, void*) at /Volumes/.../OpenSource/Source/WebCore/platform/cf/MainThreadSharedTimerCF.cpp:74
#12     0x00007fffbae2a2b4 in __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ ()
#13     0x00007fffbae29f72 in __CFRunLoopDoTimer ()
#14     0x00007fffbae29aea in __CFRunLoopDoTimers ()
#15     0x00007fffbae213f4 in __CFRunLoopRun ()
#16     0x00007fffbae20959 in CFRunLoopRunSpecific ()
#17     0x00007fffba16f97b in RunCurrentEventLoopInMode ()
#18     0x00007fffba16f627 in ReceiveNextEventCommon ()
#19     0x00007fffba16f49c in _BlockUntilNextEventMatchingListInModeWithFilter ()
#20     0x00007fffb84551eb in _DPSNextEvent ()
#21     0x00007fffb8bdb53a in -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] ()
#22     0x00007fffb8449d75 in -[NSApplication run] ()
#23     0x00007fffb8419149 in NSApplicationMain ()
#24     0x0000000100008f39 in main at /Volumes/.../OpenSource/Tools/MiniBrowser/mac/main.m:32
#25     0x00007fffe22b111d in start ()

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