Bug 212429 - Bad main thread latching with this testcase
Summary: Bad main thread latching with this testcase
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Scrolling (show other bugs)
Version: Safari Technology Preview
Hardware: Unspecified Unspecified
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2020-05-27 13:25 PDT by Simon Fraser (smfr)
Modified: 2020-05-27 13:25 PDT (History)
2 users (show)

See Also:

Attachments
testcase (1.41 KB, text/html)
2020-05-27 13:25 PDT, Simon Fraser (smfr) 		no flags Details
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Description Simon Fraser (smfr) 2020-05-27 13:25:16 PDT 
Created attachment 400373 [details]
testcase

Put your cursor in the top right area of the "passive" box, and swipe to scroll down. The scroll will get trapped by the active box.

This is caused by bad latching logic in the EventHandler code.
Comment 1 Radar WebKit Bug Importer 2020-05-27 13:25:37 PDT 
<rdar://problem/63687739>