[Webkit-unassigned] [Bug 214322] New: [ iOS ] http/tests/workers/worker-importScripts-banned-mimetype.html is flakey crashing

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214322

            Bug ID: 214322
           Summary: [ iOS ]
                    http/tests/workers/worker-importScripts-banned-mimetyp
                    e.html is flakey crashing
           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: hector_i_lopez at apple.com

http/tests/workers/worker-importScripts-banned-mimetype.html

It looks like this test is a flakey crash. Seeing it sporadically through history.

History:
https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fworkers%2Fworker-importScripts-banned-mimetype.html

Crash log:
CoreSimulator 704.12 - Device: Managed 0 (55D2C54D-A8DB-485B-8ABB-513802BE7C41) - Runtime: iOS 13.4 (17E255) - DeviceType: iPhone SE
CRASHING TEST: /workers/worker-importScripts-banned-mimetype.html

Thread 0 Crashed:: Dispatch queue: com.apple.main-thread
0   com.apple.JavaScriptCore            0x000000046d55de5e WTFCrash + 14 (Assertions.cpp:295)
1   com.apple.WebCore                   0x0000000472d3c3eb WTFCrashWithInfo(int, char const*, char const*, int) + 27
2   com.apple.WebCore                   0x0000000474ebde5f WebCore::JSEventListener::ensureJSFunction(WebCore::ScriptExecutionContext&) const + 639 (JSEventListener.h:125)
3   com.apple.WebCore                   0x0000000474ebd1bd WebCore::JSEventListener::handleEvent(WebCore::ScriptExecutionContext&, WebCore::Event&) + 205 (JSEventListener.cpp:113)
4   com.apple.WebCore                   0x00000004755ab127 WebCore::EventTarget::innerInvokeEventListeners(WebCore::Event&, WTF::Vector<WTF::RefPtr<WebCore::RegisteredEventListener, WTF::DumbPtrTraits<WebCore::RegisteredEventListener> >, 1ul, WTF::CrashOnOverflow, 16ul, WTF::FastMalloc>, WebCore::EventTarget::EventInvokePhase) + 1063 (EventTarget.cpp:342)
5   com.apple.WebCore                   0x00000004755a7370 WebCore::EventTarget::fireEventListeners(WebCore::Event&, WebCore::EventTarget::EventInvokePhase) + 720 (EventTarget.cpp:273)

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