One-off crash in GTK CSS while starting darktable

Is there an existing issue for this?

• I checked and did not find my issue in the already reported ones

Describe the bug

Crash on startup. Did not recur when I started darktable again. The crash was the third or fourth time I started darktable today. None of the other starts had any issues. dt is just a script that only runs darktable "$@" and does nothing else.

$sleep 2; dt ./
     0.0001 [dt starting]
 darktable ./

(darktable:3138712): dbind-WARNING **: 19:24:37.453: AT-SPI: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files

(darktable:3138712): Gdk-CRITICAL **: 19:24:40.613: gdk_window_set_cursor: assertion 'GDK_IS_WINDOW (window)' failed
**
Gtk:ERROR:../../../gtk/gtkcssinheritvalue.c:33:gtk_css_value_inherit_free: code should not be reached
Bail out! Gtk:ERROR:../../../gtk/gtkcssinheritvalue.c:33:gtk_css_value_inherit_free: code should not be reached
**
Gtk:ERROR:../../../gtk/gtkcssinheritvalue.c:33:gtk_css_value_inherit_free: code should not be reached
Bail out! Gtk:ERROR:../../../gtk/gtkcssinheritvalue.c:33:gtk_css_value_inherit_free: code should not be reached
/home/xsdg/usr/bin/dt: line 4: 3138712 Aborted                 darktable "$@"

$sleep 2; dt ./
     0.0001 [dt starting]
 darktable ./

(darktable:3138808): dbind-WARNING **: 19:26:48.279: AT-SPI: Error retrieving accessibility bus address: org.freedesktop.DBus.Error.ServiceUnknown: The name org.a11y.Bus was not provided by any .service files

(darktable:3138808): Gdk-CRITICAL **: 19:26:50.933: gdk_window_set_cursor: assertion 'GDK_IS_WINDOW (window)' failed

Steps to reproduce

n/a. Does not occur consistently.

Expected behavior

No response

Logfile | Screenshot | Screencast

No response

Commit

No response

Where did you obtain darktable from?

distro packaging

darktable version

5.4.0

What OS are you using?

Linux

What is the version of your OS?

Debian (unstable)

Describe your system

$dpkg -l darktable libcairo2 libgdk-pixbuf-2.0-0 libgtk-3-0t64 libpango-1.0-0 libpangocairo-1.0-0 
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Inst/Conf-files/Unpacked/halF-conf/Half-inst/trig-aWait/Trig-pend
|/ Err?=(none)/Reinst-required (Status,Err: uppercase=bad)
||/ Name                      Version           Architecture Description
+++-=========================-=================-============-==================>
ii  darktable                 5.4.0-1           amd64        virtual lighttable>
ii  libcairo2:amd64           1.18.2-2          amd64        Cairo 2D vector gr>
ii  libgdk-pixbuf-2.0-0:amd64 2.42.10+dfsg-3+b3 amd64        GDK Pixbuf library
ii  libgtk-3-0t64:amd64       3.24.51-1         amd64        GTK graphical user>
ii  libpango-1.0-0:amd64      1.52.1+ds-1       amd64        Layout and renderi>
ii  libpangocairo-1.0-0:amd64 1.52.1+ds-1       amd64        Layout and renderi>

Using X11 and xfce

Are you using OpenCL GPU in darktable?

No

If yes, what is the GPU card and driver?

No response

Please provide additional context if applicable. You can attach files too, but might need to rename to .txt or .zip

No response

Start by running the reported dt ./ command on Debian unstable with the listed darktable and GTK package versions. No project file or test is named, and the crash is not reproducible; progress would require a reproducible failure or diagnostic evidence that identifies whether darktable or the GTK stack is responsible.