Bug 216679 - Corrupted rendering behavior on GitHub
Summary: Corrupted rendering behavior on GitHub
Status: RESOLVED WORKSFORME
Alias: None
Product: WebKit
Classification: Unclassified
Component: Scrolling (show other bugs)
Version: Safari Technology Preview
Hardware: Mac macOS 10.15
: P2 Normal
Assignee: Simon Fraser (smfr)
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-09-17 19:30 PDT by Marcos Caceres
Modified: 2021-08-16 02:00 PDT (History)
4 users (show)

See Also:

Attachments
Video showing rendering error (2.08 MB, video/quicktime)
2020-09-17 19:30 PDT, Marcos Caceres 		no flags Details
View All Add an attachment (proposed patch, testcase, etc.)

Note You need to log in before you can comment on or make changes to this bug.
Description Marcos Caceres 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).
Comment 1 Alexey Proskuryakov 2020-09-19 11:53:01 PDT 
> (Safari 14 + STP)

Did this affect earlier versions too?
Comment 2 Radar WebKit Bug Importer 2020-09-21 11:48:07 PDT 
<rdar://problem/69317429>
Comment 3 Marcos Caceres 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.
Comment 4 Simon Fraser (smfr) 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).
Comment 5 Marcos Caceres 2021-08-16 02:00:59 PDT 
Seems this got fixed at some point.