Bug 313362 – [Sequoia+] imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit.html is a flaky TEXT failure

• Component: Media
• Status: NEW

[Karl Rackler]

Description:
imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit.html is a flaky TEXT failure on mac Sequoia Debug since bringup.

The test fails on the earliest available Tahoe build through the current build.
The test also fails on Tahoe -- so not Sequoia-specific.

This issue can be reproduced using the command:
run-webkit-tests --no-build --no-retry --no-show-results --exit-after-n-failures=1 --expect-pass --iterations=553 --force -1 --debug imported/w3c/web-platform-tests/media-source/mediasource-changetype-play-implicit.html

------------- BISECTION AUDIT TRAIL -------------
299693@main, 4bc8ba895595 --> TEXT
299693@main, 4bc8ba895595 --> TEXT
300779@main, 030569620280 --> TEXT
302241@main, 67566fbf18ea --> TEXT
303418@main, 23a95af7a9d8 --> TEXT
305057@main, a8c1ee2c5c05 --> TEXT
306544@main, 1e6abe4adab7 --> TEXT
307935@main, a2b0e55f4150 --> TEXT
309275@main, 760f1d48c0e4 --> TEXT
310593@main, 3ac5b0e0cb77 --> TEXT
312005@main, 709cde155d94 --> TEXT
312008@main, e07a37a66540 --> TEXT
312039@main, 9c5edc91546a --> TEXT
------------- BISECTION AUDIT TRAIL END -------------

History:
https://results.webkit.org/?version_name=Tahoe&suite=layout-tests&test=imported%2Fw3c%2Fweb-platform-tests%2Fmedia-source%2Fmediasource-changetype-play-implicit.html

Diff:
--- 
+++ 
@@ -1,8 +1,20 @@
 
-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
+Harness Error (TIMEOUT), message = null
+
+PASS Check if browser supports enough test media types and pairs of audio-only or video-only media with same bytestream format
+TIMEOUT Test audio-only implicit changeType for audio/webm; codecs="vorbis" <-> audio/webm; codecs="vorbis" Test timed out
+PASS Test audio-only implicit changeType for audio/webm; codecs="vorbis" <-> audio/webm; codecs="vorbis" (using types without codecs parameters for addSourceBuffer)
 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)
+TIMEOUT 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) Test timed out
 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"
-PASS Test video-only implicit changeType for video/mp4; codecs="avc1.4D4001" <-> video/mp4; codecs="avc1.4D4001" (using types without codecs parameters for addSourceBuffer)
+PASS Test video-only implicit changeType for video/webm; codecs="vp8" <-> video/webm; codecs="vp8"
+PASS Test video-only implicit changeType for video/webm; codecs="vp8" <-> video/webm; codecs="vp8" (using types without codecs parameters for addSourceBuffer)
+FAIL Test video-only implicit changeType for video/webm; codecs="vp8" <-> video/webm; codecs="vp9" assert_unreached: Unexpected event 'error' Reached unreachable code
+FAIL Test video-only implicit changeType for video/webm; codecs="vp8" <-> video/webm; codecs="vp9" (using types without codecs parameters for addSourceBuffer) assert_unreached: Unexpected event 'error' Reached unreachable code
+FAIL Test video-only implicit changeType for video/webm; codecs="vp9" <-> video/webm; codecs="vp8" assert_unreached: Unexpected event 'error' Reached unreachable code
+FAIL Test video-only implicit changeType for video/webm; codecs="vp9" <-> video/webm; codecs="vp8" (using types without codecs parameters for addSourceBuffer) assert_unreached: Unexpected event 'error' Reached unreachable code
+PASS Test video-only implicit changeType for video/webm; codecs="vp9" <-> video/webm; codecs="vp9"
+PASS Test video-only implicit changeType for video/webm; codecs="vp9" <-> video/webm; codecs="vp9" (using types without codecs parameters for addSourceBuffer)
+TIMEOUT Test video-only implicit changeType for video/mp4; codecs="avc1.4D4001" <-> video/mp4; codecs="avc1.4D4001" Test timed out
+TIMEOUT Test video-only implicit changeType for video/mp4; codecs="avc1.4D4001" <-> video/mp4; codecs="avc1.4D4001" (using types without codecs parameters for addSourceBuffer) Test timed out

[Karl Rackler]

<rdar://175636559>

[EWS]

Test gardening commit 312054@main (c06ceeb97a16): <https://commits.webkit.org/312054@main>

Reviewed commits have been landed. Closing PR #63647 and removing active labels.