[Webkit-unassigned] [Bug 180174] New: Layout Test storage/indexeddb/detached-iframe.html is a flaky crash.

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=180174

            Bug ID: 180174
           Summary: Layout Test storage/indexeddb/detached-iframe.html is
                    a flaky crash.
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: New Bugs
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: jlewis3 at apple.com
                CC: achristensen at apple.com, cdumez at apple.com,
                    joepeck at webkit.org

Created attachment 327924

  --> https://bugs.webkit.org/attachment.cgi?id=327924&action=review

WK1 Crash-Log

storage/indexeddb/detached-iframe.html is a flaky crash on macOS according to the flakiness dashboard:
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=storage%2Findexeddb%2Fdetached-iframe.html

Crashed Thread:

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.WebCore                   0x0000000450402a8c WebCore::Frame::page() const + 12 (Frame.h:373)
1   com.apple.WebCore                   0x0000000451830325 WebCore::InspectorInstrumentation::instrumentingAgentsForFrame(WebCore::Frame&) + 21 (InspectorInstrumentation.h:1431)
2   com.apple.WebCore                   0x0000000452480116 WebCore::InspectorInstrumentation::didDispatchPostMessage(WebCore::Frame&, WebCore::TimerBase&) + 54 (InspectorInstrumentation.h:731)
3   com.apple.WebCore                   0x000000045247fe57 WebCore::DOMWindow::postMessageTimerFired(WebCore::PostMessageTimer&) + 551 (DOMWindow.cpp:973)
4   com.apple.WebCore                   0x0000000452491cfe WebCore::PostMessageTimer::fired() + 350 (DOMWindow.cpp:176)
5   com.apple.WebCore                   0x00000004526a4964 WebCore::ThreadTimers::sharedTimerFiredInternal() + 452 (ThreadTimers.cpp:118)
6   com.apple.WebCore                   0x00000004526b91c1 WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::$_0::operator()() const + 33 (ThreadTimers.cpp:70)
7   com.apple.WebCore                   0x00000004526b9179 WTF::Function<void ()>::CallableWrapper<WebCore::ThreadTimers::setSharedTimer(WebCore::SharedTimer*)::$_0>::call() + 25 (Function.h:101)
8   com.apple.WebCore                   0x000000045000f1ab WTF::Function<void ()>::operator()() const + 139 (Function.h:56)
9   com.apple.WebCore                   0x000000045267c3d5 WebCore::MainThreadSharedTimer::fired() + 101 (MainThreadSharedTimer.cpp:55)
10  com.apple.WebCore                   0x000000045271bdb9 WebCore::timerFired(__CFRunLoopTimer*, void*) + 41 (MainThreadSharedTimerCF.cpp:74)
11  com.apple.CoreFoundation            0x00007fff31a46084 __CFRUNLOOP_IS_CALLING_OUT_TO_A_TIMER_CALLBACK_FUNCTION__ + 20
12  com.apple.CoreFoundation            0x00007fff31a45d04 __CFRunLoopDoTimer + 1108
13  com.apple.CoreFoundation            0x00007fff31a457fa __CFRunLoopDoTimers + 346
14  com.apple.CoreFoundation            0x00007fff31a3cfcb __CFRunLoopRun + 2427
15  com.apple.CoreFoundation            0x00007fff31a3c3b7 CFRunLoopRunSpecific + 487
16  com.apple.HIToolbox                 0x00007fff30d49e26 RunCurrentEventLoopInMode + 286
17  com.apple.HIToolbox                 0x00007fff30d49b96 ReceiveNextEventCommon + 613
18  com.apple.HIToolbox                 0x00007fff30d49914 _BlockUntilNextEventMatchingListInModeWithFilter + 64
19  com.apple.AppKit                    0x00007fff2f014f5f _DPSNextEvent + 2085
20  com.apple.AppKit                    0x00007fff2f7aab4c -[NSApplication(NSEvent) _nextEventMatchingEventMask:untilDate:inMode:dequeue:] + 3044
21  com.apple.AppKit                    0x00007fff2f009d6d -[NSApplication run] + 764
22  com.apple.AppKit                    0x00007fff2efd8f1a NSApplicationMain + 804
23  libxpc.dylib                        0x00007fff595ff42f _xpc_objc_main + 580
24  libxpc.dylib                        0x00007fff595fe082 xpc_main + 417
25  com.apple.WebKit.WebContent         0x000000010ea4912b main + 1195
26  libdyld.dylib                       0x00007fff59332115 start + 1



I have yet to figure out a regression point, but the first failure happened with:
https://build.webkit.org/builders/Apple%20High%20Sierra%20Release%20WK2%20(Tests)/builds/1145

The crash is slightly different between the WK1 and WK2 crashes.

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