[Webkit-unassigned] [Bug 214683] New: REGRESSION: [ macOS wk2 debug ] imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit.html is a flaky failure

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=214683

            Bug ID: 214683
           Summary: REGRESSION: [ macOS wk2 debug ]
                    imported/w3c/web-platform-tests/media-source/mediasour
                    ce-changetype-play-implicit.html is a flaky failure
           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: rackler at apple.com

Description:
imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit.html

This issue started approximately 07/14/20 since the test was introduced and is a flaky failure daily since.

History:
https://results.webkit.org/?suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fmedia-source%2Fmediasource-changetype-play-implicit.html&flavor=wk2&style=debug&platform=mac&limit=50000

Diff:
--- /Volumes/Data/slave/catalina-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit-expected.txt
+++ /Volumes/Data/slave/catalina-debug-tests-wk2/build/layout-test-results/imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit-actual.txt
@@ -1,8 +1,10 @@
+
+Harness Error (TIMEOUT), message = null

 FAIL Check if browser supports enough test media types and pairs of audio-only or video-only media with same bytestream format assert_true: Browser doesn't support at least 2 audio-only or 2 video-only test media with same bytestream format expected true got false
 PASS Test audio-only implicit changeType for audio/mp4; codecs="mp4a.40.2" <-> audio/mp4; codecs="mp4a.40.2" 
 PASS Test audio-only implicit changeType for audio/mp4; codecs="mp4a.40.2" <-> audio/mp4; codecs="mp4a.40.2" (using types without codecs parameters for addSourceBuffer) 
 PASS Test audio-only implicit changeType for audio/mpeg <-> audio/mpeg 
-PASS Test video-only implicit changeType for video/mp4; codecs="avc1.4D4001" <-> video/mp4; codecs="avc1.4D4001" 
+TIMEOUT Test video-only implicit changeType for video/mp4; codecs="avc1.4D4001" <-> video/mp4; codecs="avc1.4D4001" Test timed out
 PASS Test video-only implicit changeType for video/mp4; codecs="avc1.4D4001" <-> video/mp4; codecs="avc1.4D4001" (using types without codecs parameters for addSourceBuffer)

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