Bug 211916

Summary: [Mojave Debug WK2] compositing/transforms/perspective-with-scrolling.html is frequently failing
Product: WebKit Reporter: Ryan Haddad <ryanhaddad>
Component: Tools / TestsAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED FIXED    
Severity: Normal CC: simon.fraser, webkit-bot-watchers-bugzilla, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: Unspecified   
OS: Unspecified   
See Also: https://bugs.webkit.org/show_bug.cgi?id=156435
Attachments:
Description Flags
Patch none

Description Ryan Haddad 2020-05-14 12:46:20 PDT 
compositing/transforms/perspective-with-scrolling.html is frequently failing on Mojave Debug WK2

Image diff shows that the expected scroll bars & gutters are not present:
https://build.webkit.org/results/Apple%20Mojave%20Debug%20WK2%20(Tests)/r261699%20(9580)/compositing/transforms/perspective-with-scrolling-diffs.html

https://results.webkit.org/?suite=layout-tests&test=compositing%2Ftransforms%2Fperspective-with-scrolling.html
Comment 1 Radar WebKit Bug Importer 2020-05-14 12:46:38 PDT 
<rdar://problem/63239346>
Comment 2 Ryan Haddad 2020-05-14 13:32:41 PDT 
This test was just added yesterday with https://trac.webkit.org/changeset/261632/webkit
Comment 3 Simon Fraser (smfr) 2020-05-14 15:10:42 PDT 
Scrollbar differences.
Comment 4 Simon Fraser (smfr) 2020-05-14 15:13:22 PDT 
I can reproduce. Toggling overlay scrollbars must have some asynchrony somehow.
Comment 5 Simon Fraser (smfr) 2020-05-14 20:45:55 PDT 
Created attachment 399452 [details]
Patch
Comment 6 Simon Fraser (smfr) 2020-05-14 21:23:16 PDT 
Attempt to de-flake: https://trac.webkit.org/changeset/261730/webkit
Comment 7 Simon Fraser (smfr) 2020-05-17 20:02:12 PDT 
Seems to have worked.