Bug 201588 - Flaky Test: imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/ready-states/autoplay-with-slow-text-tracks.html
Summary: Flaky Test: imported/w3c/web-platform-tests/html/semantics/embedded-content/m...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Tools / Tests (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: WebKit Commit Bot
Depends on:
Blocks: 50856
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Reported: 2019-09-07 22:22 PDT by WebKit Commit Bot
Modified: 2019-09-10 08:58 PDT (History)
4 users (show)

See Also:

Archive of layout-test-results from webkit-cq-01 (3.18 MB, application/zip)
2019-09-07 22:22 PDT, WebKit Commit Bot
no flags Details

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Description WebKit Commit Bot 2019-09-07 22:22:46 PDT
This is an automatically generated bug from the commit-queue.
imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/ready-states/autoplay-with-slow-text-tracks.html has been flaky on the commit-queue.

imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/ready-states/autoplay-with-slow-text-tracks.html was authored by youennf@gmail.com.

The commit-queue just saw imported/w3c/web-platform-tests/html/semantics/embedded-content/media-elements/ready-states/autoplay-with-slow-text-tracks.html flake (text diff) while processing attachment 378311 [details] on bug 201584.
Bot: webkit-cq-01  Port: <class 'webkitpy.common.config.ports.MacPort'>  Platform: Mac OS X 10.13.6

The bots will update this with information from each new failure.

If you believe this bug to be fixed or invalid, feel free to close.  The bots will re-open if the flake re-occurs.

If you would like to track this test fix with another bug, please close this bug as a duplicate.  The bots will follow the duplicate chain when making future comments.
Comment 1 WebKit Commit Bot 2019-09-07 22:22:48 PDT
Created attachment 378319 [details]
Archive of layout-test-results from webkit-cq-01
Comment 2 Alexey Proskuryakov 2019-09-10 08:58:36 PDT
This test has been very flaky on macOS Mojave for a long time, see bug 176929. Failures on High Sierra aren't new either, but post-commit bots only see them on WebKit1 or GuardMalloc bots, not on Release WebKit2 like here.

The diff appears to always be the same though.

@@ -1,4 +1,3 @@
-CONSOLE MESSAGE: line 31: TypeError: null is not an object (evaluating 'track.track.cues.length')
 CONSOLE MESSAGE: line 31: TypeError: null is not an object (evaluating 'track.track.cues.length')
 CONSOLE MESSAGE: line 31: TypeError: null is not an object (evaluating 'track.track.cues.length')
 CONSOLE MESSAGE: line 31: TypeError: null is not an object (evaluating 'track.track.cues.length')