Bug 197639 – REGRESSION (r244900): Layout Test media/track/track-cue-missing.html is failing on iOS and macOS debug

• Status: RESOLVED
• Resolution: FIXED
• Component: New Bugs

[Ryan Haddad]

The following layout test is failing on iOS and macOS debug bots

media/track/track-cue-missing.html

Probable cause:

The dashboard suggests this regression range: https://trac.webkit.org/log/webkit/?verbose=on&rev=244901&stop_rev=244900

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2Ftrack%2Ftrack-cue-missing.html

--- /Volumes/Data/slave/mojave-debug-tests-wk2/build/layout-test-results/media/track/track-cue-missing-expected.txt
+++ /Volumes/Data/slave/mojave-debug-tests-wk2/build/layout-test-results/media/track/track-cue-missing-actual.txt
@@ -5,6 +5,6 @@
 EVENT(loadeddata)
 Created 121 cues.
 EVENT(ended)
-EXPECTED (missedCueCount < '50') OK
+EXPECTED (missedCueCount < '50'), OBSERVED '72' FAIL
 END OF TEST

[Ryan Haddad]

I have not yet been able to reproduce this locally.

[Ryan Haddad]

Using the following command, I cannot reproduce this with a debug build of r244899, but I can with r244900:

run-webkit-tests media/track/track-cue-missing.html --no-retry --iter 10 --exit-after-n-failures 1

[Ryan Haddad]

Simon, could you please take a look at this?

[Simon Fraser (smfr)]

It seems like the code that runs for logging just made the test slower, so it's a bad test.

[Simon Fraser (smfr)]

Presumably it's only bad in debug. Let's just mark it flakey for debug only.

[Alexey Proskuryakov]

The plan is to roll back the patch, not to increase the number of tests marked as flaky.

[Ryan Haddad]

Rolled out r244900 in https://trac.webkit.org/r245019

[Radar WebKit Bug Importer]

<rdar://problem/50548909>