Bug 216679

Summary: Corrupted rendering behavior on GitHub
Product: WebKit Reporter: Marcos Caceres <marcos>
Component: ScrollingAssignee: Simon Fraser (smfr) <simon.fraser>
Status: RESOLVED WORKSFORME    
Severity: Normal CC: bfulgham, simon.fraser, webkit-bug-importer, zalan
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Mac   
OS: macOS 10.15   
Attachments:
Description Flags
Video showing rendering error none

Marcos Caceres
Reported 2020-09-17 19:30:35 PDT
Created attachment 409100 [details] Video showing rendering error (Safari 14 + STP) Steps to reproduce: 1. Visit any open pull request on GitHub 2. Click on "files" 3. Scroll until header snaps 4. Either scroll up/down to see rendering defect or keep scrolling... it randomly occurs (see attached video).
Attachments
Video showing rendering error (2.08 MB, video/quicktime)
2020-09-17 19:30 PDT, Marcos Caceres 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Alexey Proskuryakov
Comment 1 2020-09-19 11:53:01 PDT
> (Safari 14 + STP) Did this affect earlier versions too?
Radar WebKit Bug Importer
Comment 2 2020-09-21 11:48:07 PDT
<rdar://problem/69317429>
Marcos Caceres
Comment 3 2020-09-21 11:59:10 PDT
(In reply to Alexey Proskuryakov from comment #1) > > (Safari 14 + STP) > > Did this affect earlier versions too? Not that I’ve seen. I’ve been using Safari daily on GitHub for years.
Simon Fraser (smfr)
Comment 4 2020-09-22 14:30:32 PDT
I can reproduce, but it's not quite as obvious as the video recording. Stretched layer contents is almost always a bug (unless the content is doing scale transforms).
Marcos Caceres
Comment 5 2021-08-16 02:00:59 PDT
Seems this got fixed at some point.
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