238323 2022-03-24 07:49:06 -0700 [GTK4] UI process hang when opening HTML select elements (combo boxes) 2022-09-07 08:50:58 -0700 1 1 1 Unclassified WebKit WebKitGTK WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=238361 P2 Normal --- 210100 1 mcatanzaro webkit-unassigned alicem bugs-noreply cgarcia contact mcatanzaro oldest_to_newest 1854673 0 mcatanzaro 2022-03-24 07:49:06 -0700 I'm seeing very frequent UI process hangs when attempting to report bugs on this Bugzilla. The problem occurs when clicking on the select elements (combo boxes) next to the "Hardware" or "OS" fields when reporting bugs. (You'll notice I've left those at Unspecified to avoid triggering this bug.) The entire UI process hangs when clicking on the element. The bug is not 100% reproducible, but you should be able to trigger it if you try a few times. 1854692 1 cgarcia 2022-03-24 08:46:53 -0700 Is this GTK4 only? 1854713 2 mcatanzaro 2022-03-24 09:33:27 -0700 Yes, this never happens with GTK 3. 1855392 3 mcatanzaro 2022-03-26 08:34:34 -0700 Another reproducer: try to give r+ to a patch on this Bugzilla. 1855393 4 mcatanzaro 2022-03-26 08:38:15 -0700 Checking with gdb, it looks like the UI process is just calling poll() when this happens, and hovering buttons in the Epiphany header bar triggers animations, so I don't think this is a traditional hang or deadlock where the UI process is totally unresponsive. However, it's not just web views that are busted: the buttons in the header bar don't do anything, so GTK itself is somehow broken. 1888816 5 alicem 2022-08-04 01:56:21 -0700 This looks like yet another instance of the bug behind https://gitlab.gnome.org/GNOME/gtk/-/issues/2877 or the one where gtk4-demo sidebar items remain pressed after double clicking Basically, input is completely busted when another surface is spawned or destroyed in the middle of an event sequence - e.g. a click. 1895772 6 alicem 2022-09-02 07:02:14 -0700 Ok, so I can still reproduce it so apparently that wasn't it. 1896800 7 alicem 2022-09-07 07:14:18 -0700 *** Bug 240922 has been marked as a duplicate of this bug. *** 1896802 8 alicem 2022-09-07 07:16:20 -0700 Pull request: https://github.com/WebKit/WebKit/pull/4095 1896823 9 ews-feeder 2022-09-07 08:50:54 -0700 Committed 254237@main (4e07bc369ad1): <https://commits.webkit.org/254237@main> Reviewed commits have been landed. Closing PR #4095 and removing active labels.