Firefox 46 segfaults when double-clicking on tab strip
After upgrading Firefox from 45.0.2 to 46.0 a problem has arisen where
Firefox segfaults with the following message:
Gdk:ERROR:gdkwindow-x11.c: 5147:create_moveresize_window: assertion
failed: (mv_resize->moveresize_emulation_window == NULL)
This happens when double-clicking on the tab strip on the right
side of the last tab. This will normally open a new tab.
I have tested in both dwm and by starting Firefox directly from
xinitrc.
Firefox will only segfault when built with the new default cario-gtk3
toolkit. After rebuilding with “—enable-default-toolkit=cairo-gtk2”
Firefox no longer segfaults.
Full backtrace is attached.
(from redmine: issue id 5524, created on 2016-04-30)
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