[Webkit-unassigned] [Bug 195779] New: REGRESSION: Layout Test http/tests/security/cross-origin-indexeddb.html is crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=195779

            Bug ID: 195779
           Summary: REGRESSION: Layout Test
                    http/tests/security/cross-origin-indexeddb.html is
                    crashing
           Product: WebKit
           Version: WebKit Nightly Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: tsavell at apple.com
                CC: lforschler at apple.com

The following layout test is crashing on iOS and Mac Debug WK2

http/tests/security/cross-origin-indexeddb.html

Probable cause:

This test recently began crashing around r242911. It is fairly consistent failure and crashes around 90% of the time on the bots. I am unable to reproduce locally right now. 

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=http%2Ftests%2Fsecurity%2Fcross-origin-indexeddb.html

Crash:
https://build.webkit.org/results/Apple%20Mojave%20Debug%20WK2%20(Tests)/r242946%20(1942)/http/tests/security/cross-origin-indexeddb-crash-log.txt

VM Regions Near 0xbbadbeef:
--> 
    __TEXT                 0000000104c3c000-0000000104c3d000 [    4K] r-x/rwx SM=COW  /Volumes/VOLUME/*/*.Development

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore            0x000000011dc8ff40 WTFCrash + 16 (Assertions.cpp:305)
1   com.apple.WebCore                   0x000000010b8e154b WTFCrashWithInfo(int, char const*, char const*, int) + 27
2   com.apple.WebCore                   0x000000010d178aaa WTF::CrossThreadQueue<WTF::CrossThreadTask>::append(WTF::CrossThreadTask&&) + 138 (CrossThreadQueue.h:64)

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