Bug 200888

Summary: Composited overscroll in position: fixed paints wrong
Product: WebKit Reporter: Philip Rogers <pdr>
Component: ScrollingAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: Safari Technology Preview   
Hardware: Unspecified   
OS: Unspecified   
Attachments:
Description Flags
Testcase none

Philip Rogers
Reported 2019-08-19 09:35:11 PDT
Created attachment 376691 [details] Testcase When composited overscrolling in position:fixed, the scroller can repaint incorrectly. To reproduce: 1) Open the attached testcase. 2) Use the trackpad to scroll the green box down 3) Use the trackpad to fling scroll the green box up 4) While the green box is overscrolled, quickly fling scroll the green box up again. A screenshot of this bug is available at http://pr.gg/safariscrollbug.png
Attachments
Testcase (325 bytes, text/html)
2019-08-19 09:35 PDT, Philip Rogers 		no flags
Details
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Radar WebKit Bug Importer
Comment 1 2019-08-19 10:32:46 PDT
<rdar://problem/54472544>
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