RESOLVED FIXED 279588
[CSS anchor positioning] WebProcess crash when popover uses anchoring 
https://bugs.webkit.org/show_bug.cgi?id=279588
Summary [CSS anchor positioning] WebProcess crash when popover uses anchoring
Pawel Lampe
Reported 2024-09-12 02:58:50 PDT
Created attachment 472535 [details] small repro demo The problem is that element.renderer() is nullptr in the Source/WebCore/style/StyleTreeResolver.cpp:1340
Attachments
small repro demo (770 bytes, text/html)
2024-09-12 02:58 PDT, Pawel Lampe 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Alexey Proskuryakov
Comment 1 2024-09-16 09:22:47 PDT
Thank you for the report. What are you seeing this with? I cannot reproduce with the build of Safari I have on my machine, but unsure if it's newer or older.
Antti Koivisto
Comment 2 2024-09-16 10:18:25 PDT
Thanks for the report. CSS anchor positioning is work-in-progress and not enabled by default yet.
Pawel Lampe
Comment 3 2024-09-16 23:16:28 PDT
Thanks for feedback. As for the issue, I can see a crash when popover is being hidden (after 2 button presses). I've workarounded it with https://github.com/WebKit/WebKit/pull/33696
Radar WebKit Bug Importer
Comment 4 2024-09-19 03:00:08 PDT
<rdar://problem/136282104>
EWS
Comment 5 2024-10-17 06:33:11 PDT
Committed 285334@main (ba8e7f03c9a9): <https://commits.webkit.org/285334@main> Reviewed commits have been landed. Closing PR #33696 and removing active labels.
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