Bug 198757 - [ Mojave+ ] Layout Test compositing/fixed-with-main-thread-scrolling.html is a flaky timeout
Summary: [ Mojave+ ] Layout Test compositing/fixed-with-main-thread-scrolling.html is ...
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: 2019-06-11 10:16 PDT by Shawn Roberts
Modified: 2019-06-11 10:27 PDT (History)
6 users (show)

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Description Shawn Roberts 2019-06-11 10:16:32 PDT
The following layout test is flaky on Mojave WK2 Release and Debug

compositing/fixed-with-main-thread-scrolling.html

Probable cause:

Appears to have been flaky its entire history since its last change in r238883 . 

Local testing I verified flaky behavior from current revision all the way back to 238883, but flaky behavior did seem to get worse around r244215 but I cannot verify completely since results are very sporadic. 

Verified with :

run-webkit-tests compositing/fixed-with-main-thread-scrolling.html --iter 500 -f

Flakiness Dashboard:

https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=compositing%2Ffixed-with-main-thread-scrolling.html
Comment 1 Radar WebKit Bug Importer 2019-06-11 10:17:34 PDT
<rdar://problem/51628629>
Comment 2 Shawn Roberts 2019-06-11 10:25:56 PDT
Updated expectations in https://trac.webkit.org/changeset/246323/webkit