/usr/bin/xfce4-color-settings:11:g_type_check_instance_is_fundamentally_a:g_object_unref:color_settings_dialog_destroy:_gtk_marshal_BOOLEAN__BOXEDv:_g_closure_invoke_va

[errors.ubuntu.com bug bridge]

The Ubuntu Error Tracker has been receiving reports about a problem regarding xfce4-settings. This problem was most recently seen with package version 4.14.1-1ubuntu1, the problem page at https://errors.ubuntu.com/problem/08adaea9b59dac8d9be2a0ecaadbe97d575ec6cf contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.

[Tiny-lasagna (tiny-lasagna)]

Created attachment 8944
Example of color settings not showing any profiles

How to (possibly) reproduce:

Run xfce4-color-settings from a shell.
On my device, it says "No profiles for the selected device".
Click "+" to add a color profile. Close the current dialog (either by pressing Esc or clicking on X) without doing any changes.
Click on "+" again. The following shows up on stderr:

(xfce4-color-settings:344): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'XfceHeading'
(xfce4-color-settings:344): GLib-GObject-WARNING **: invalid unclassed pointer in cast to 'GtkWidget'
(xfce4-color-settings:344): Gtk-CRITICAL **: gtk_widget_queue_resize: assertion 'GTK_IS_WIDGET (widget)' failed
(xfce4-color-settings:344): Gtk-CRITICAL **: gtk_container_foreach: assertion 'GTK_IS_CONTAINER (container)' failed

The profile list doesn't show up anymore (see attachment). When the above is done repeatedly, the program sometimes segfaults altogether, or aborts for various reasons such as:

free(): invalid size

or

corrupted size vs. prev_size

or

munmap_chunk(): invalid pointer

or

double free or corruption (out)

or even

free(): invalid pointer

Temporary workaround:
Exit the "Add color profile to monitor" dialog exclusively by clicking on the "Cancel" button

[Simon Steinbeiß (ochosi)]

I can confirm the issue, I'll look into a fix.

[Gitbot (gitbot)]

Simon Steinbeiss referenced this bugreport in commit ef0715288c36181bbb7061ebcee815fd14ed8708

color: Fix crash in add-profiles dialog (Bug #15876)

https://git.xfce.org/xfce/xfce4-settings/commit?id=ef0715288c36181bbb7061ebcee815fd14ed8708

[Simon Steinbeiß (ochosi)]

I've pushed a fix to master. Please re-open if you see any more trouble.

[Gitbot (gitbot)]

Simon Steinbeiss referenced this bugreport in commit 6d286c0ed8dd3964f21d8e3d48f15f1dbf465787

color: Fix crash in add-profiles dialog (Bug #15876)

https://git.xfce.org/xfce/xfce4-settings/commit?id=6d286c0ed8dd3964f21d8e3d48f15f1dbf465787

[Sean Davis (bluesabre)]

This error is still reported in jammy.