279588 2024-09-12 02:58:50 -0700 [CSS anchor positioning] WebProcess crash when popover uses anchoring 2024-10-17 06:33:13 -0700 1 1 1 Unclassified WebKit CSS WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED InRadar P2 Normal --- 281290 1 plampe plampe ap david_choi5 koivisto webkit-bug-importer oldest_to_newest 2059641 0 472535 plampe 2024-09-12 02:58:50 -0700 Created attachment 472535 small repro demo The problem is that element.renderer() is nullptr in the Source/WebCore/style/StyleTreeResolver.cpp:1340 2060450 1 ap 2024-09-16 09:22:47 -0700 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. 2060475 2 koivisto 2024-09-16 10:18:25 -0700 Thanks for the report. CSS anchor positioning is work-in-progress and not enabled by default yet. 2060693 3 plampe 2024-09-16 23:16:28 -0700 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 2061403 4 webkit-bug-importer 2024-09-19 03:00:08 -0700 <rdar://problem/136282104> 2068755 5 ews-feeder 2024-10-17 06:33:11 -0700 Committed 285334@main (ba8e7f03c9a9): <https://commits.webkit.org/285334@main> Reviewed commits have been landed. Closing PR #33696 and removing active labels. 472535 2024-09-12 02:58:50 -0700 2024-09-12 02:58:50 -0700 small repro demo index.html text/html 770 plampe PGh0bWw+CiAgPGhlYWQ+CiAgICA8c3R5bGU+CiAgICAgIC5kcm9wZG93biB7CiAgICAgICAgICBh bmNob3ItbmFtZTogLS1kcm9wZG93bkFuY2hvcjsKICAgICAgfQogICAgICAuZHJvcGRvd24tbWVu dSB7CiAgICAgICAgICBwb3NpdGlvbi1hbmNob3I6IC0tZHJvcGRvd25BbmNob3I7CiAgICAgICAg ICBtYXJnaW46IDA7CiAgICAgICAgICBwYWRkaW5nOiAwOwogICAgICAgICAgb3ZlcmZsb3c6IGF1 dG87CiAgICAgICAgICBoZWlnaHQ6IGF1dG87CiAgICAgICAgICB0b3A6IGFuY2hvcihib3R0b20p OwogICAgICAgICAgbGVmdDogYW5jaG9yKHJpZ2h0KTsKICAgICAgfQogICAgPC9zdHlsZT4KICA8 L2hlYWQ+CiAgPGJvZHk+CiAgICA8YnV0dG9uIGlkPSJkcm9wZG93biIgY2xhc3M9ImRyb3Bkb3du Ij5DbGljayBtZSB0d2ljZTwvYnV0dG9uPgogICAgPGRpdiBpZD0icG9wb3ZlciIgY2xhc3M9ImRy b3Bkb3duLW1lbnUiPgogICAgICA8bGk+TG9yZW08L2xpPgogICAgICA8bGk+SXBzdW08L2xpPgog ICAgICA8bGk+RG9sb3I8L2xpPgogICAgPC9kaXY+CiAgICA8aHI+PGhyPjxocj4KICAgIDxzY3Jp cHQ+CiAgICAgIGNvbnN0IHBvcG92ZXIgPSBkb2N1bWVudC5nZXRFbGVtZW50QnlJZCgncG9wb3Zl cicpOwogICAgICBwb3BvdmVyLnBvcG92ZXIgPSAnYXV0byc7CiAgICAgIGRvY3VtZW50LmdldEVs ZW1lbnRCeUlkKCdkcm9wZG93bicpLnBvcG92ZXJUYXJnZXRFbGVtZW50ID0gcG9wb3ZlcjsKICAg IDwvc2NyaXB0PgogIDwvYm9keT4KPC9odG1sPgo=