Bug#1000498: segfaults in libst-1.0.so with "vertical overview" plugin enabled

[Simon McVittie]

On Wed, 24 Nov 2021 at 10:50:29 +0100, Detlev Zundel wrote:
> Having installed the "vertical overview" package, I experience segfaults in
> gnome-shell killing the whole session.  I do think the addon is related as log
> messages precede the segfaults.

Is this reproducible if you disable the extension?

Did you get this extension from Debian or from extensions.gnome.org?

If an extension is causing a crash, there is usually not much that
gnome-shell can do about it. Extensions work by "monkey-patching"
the gnome-shell code, and have just as much control over execution as
gnome-shell does.

> Nov 17 17:42:40 krikkit gnome-shell[2918]: ../../../gobject/gsignal.c:2732:
> instance '0x55db198ddf00' has no handler with id '10990'

This suggests that something (presumably the vertical overview extension)
is not keeping track of its signal handler IDs correctly.

> Nov 17 17:42:40 krikkit kernel: gnome-shell[2918]: segfault at 55de45d1f627 ip
> 00007f39f4900b29 sp 00007ffd73fdd360 error 4 in
> libst-1.0.so[7f39f48de000+4b000]

Can you get a backtrace from this crash? systemd-coredump is usually the
easiest way to achieve this. See: https://wiki.debian.org/HowToGetABacktrace

    smcv