RESOLVED FIXED 255162
Accessing null RemoteScrollingCoordinatorProxy in [WKWebViewIOS _didFinishScrolling] 
https://bugs.webkit.org/show_bug.cgi?id=255162
Summary Accessing null RemoteScrollingCoordinatorProxy in [WKWebViewIOS _didFinishScr...
Abrar Rahman Protyasha
Reported 2023-04-07 12:03:49 PDT
We're seeing runtime crashes at [WKWebViewIOS _didFinishScrolling] in situations where a web view is closed out during a scroll operation. This regression surfaced from https://commits.webkit.org/260975@main because it (correctly) changed the relative order of destruction between the `DrawingAreaProxy` and the `RemoteScrollingCoordinatorProxy` (and the `RemoteScrollingTree` it encompasses), which meant that there could be situations where closing or switching out a web view in the middle of a scroll operation could lead to a null deref of the `RemoteScrollingCoordinatorProxy` held by the `WebPageProxy`.
Attachments
Add attachment proposed patch, testcase, etc.
Abrar Rahman Protyasha
Comment 1 2023-04-07 12:05:10 PDT
rdar://106894608
Abrar Rahman Protyasha
Comment 2 2023-04-07 15:04:38 PDT
Pull request: https://github.com/WebKit/WebKit/pull/12532
EWS
Comment 3 2023-04-07 21:58:46 PDT
Committed 262748@main (2aa252bfd9f1): <https://commits.webkit.org/262748@main> Reviewed commits have been landed. Closing PR #12532 and removing active labels.
Note You need to log in before you can comment on or make changes to this bug.