Bug 197068 - [ macOS Debug] Layout Test fast/selectors/matches-backtracking.html is a flaky timeout
Summary: [ macOS Debug] Layout Test fast/selectors/matches-backtracking.html is a flak...
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Tools / Tests (show other bugs)
Version: WebKit Nightly Build
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2019-04-18 13:08 PDT by Shawn Roberts
Modified: 2021-10-28 16:38 PDT (History)
6 users (show)

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Description Shawn Roberts 2019-04-18 13:08:57 PDT 
The following layout test is flaky on Mojave WK2 Debug

fast/selectors/matches-backtracking.html

Probable cause:

Test appears to have been a flaky timeout in its available history on the dashboard. However around r243800 it started to time out almost every single run.

Unable to reproduce locally. Test was marked slow https://bugs.webkit.org/show_bug.cgi?id=139634, Test was added in https://trac.webkit.org/changeset/175097/webkit

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=fast%2Fselectors%2Fmatches-backtracking.html
Comment 1 Shawn Roberts 2019-04-18 13:10:29 PDT 
Adding Myles, incase https://trac.webkit.org/changeset/243828/webkit could have anything to do with this.

Adding Yusuke since he created the test. 

If anyone has any insight.
Comment 2 Radar WebKit Bug Importer 2019-04-23 08:59:15 PDT 
<rdar://problem/50131405>
Comment 3 Shawn Roberts 2019-04-23 09:07:16 PDT 
Updating test expectations in https://trac.webkit.org/changeset/244542/webkit while waiting for a fix.
Comment 4 ayumi_kojima 2021-10-28 11:05:33 PDT 
fast/selectors/is-backtracking.html is now flaky timing out on macOS wk1 Debug as well. Updated test expectations https://trac.webkit.org/changeset/284992/webkit
Comment 5 Myles C. Maxfield 2021-10-28 16:37:10 PDT 
The test just takes a long time. We should probably just split it into a bunch of different tests so each one can complete faster.
Comment 6 ayumi_kojima 2021-10-28 16:38:40 PDT 
fast/selectors/matches-backtracking.html 

Updated test expectations https://trac.webkit.org/changeset/285006/webkit