[Webkit-unassigned] [Bug 239770] [ macOS Debug wk2 ] Four imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/ are a flaky crash

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=239770

--- Comment #15 from Karl Rackler <rackler at apple.com> ---
Description: Adding two additional tests
imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/event_pause.html
imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/event_play.html

REPRODUCTION STEPS
I can reproduce this on r292959, but unable to reproduce it on 292262.  
The regression is between r292262-r295959.

Command: 
run-webkit-tests --root --exit-after-n-failures 1 --exit-after-n-crashes-or-timeouts 1 --iterations 50 -f --no-retry

Result: 
Regressions: Unexpected crashes (1)
  imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/event_pause.html [ Crash ]

Regressions: Unexpected crashes (1)
  imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/event_play.html [ Crash ]

History:
https://results.webkit.org/?suite=layout-tests&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fsemantics%2Fembedded-content%2Fmedia-elements%2Fevent_pause.html&test=imported%2Fw3c%2Fweb-platform-tests%2Fhtml%2Fsemantics%2Fembedded-content%2Fmedia-elements%2Fevent_play.html&platform=mac&flavor=wk2&style=debug&limit=50000

Crash Log:
No crash log found for com.apple.WebKit.Networking.Development:26056.

stderr: 
com.apple.WebKit.Networking.Development: Could not compile WebContent sandbox: /Volumes/Builds/292959/WebKit.framework/Resources/com.apple.WebKit.NetworkProcess.sb:549:13: unbound variable:
        MSC_mach_msg2_trap


I have marked this test as a flaky crash while this issue is investigated.

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