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Bug 785446 - segfault in um_carousel_select_item()
segfault in um_carousel_select_item()
Status: RESOLVED OBSOLETE
Product: gnome-control-center
Classification: Core
Component: User Accounts
3.24.x
Other Linux
: Normal normal
: ---
Assigned To: Control-Center Maintainers
Control-Center Maintainers
Depends on:
Blocks:
 
 
Reported: 2017-07-26 13:25 UTC by Sebastien Bacher
Modified: 2021-06-09 16:25 UTC
See Also:
GNOME target: ---
GNOME version: ---


Description Sebastien Bacher 2017-07-26 13:25:09 UTC 
The issue has been reported on Ubuntu against g-c-c 3.24.2

"Test Case
1. In a live session, open system settings
2. Click on 'Users'"

"#0  um_carousel_select_item (self=0x55c78de65520, item=0x0) at um-carousel.c:212
        page_changed = 1

+ Trace 237696

  • #1 reload_users
    at um-user-panel.c line 299
  • #2 g_closure_invoke
    at ../../../../gobject/gclosure.c line 804
  • #3 signal_emit_unlocked_R
    at ../../../../gobject/gsignal.c line 3635
  • #4 g_signal_emit_valist
    at ../../../../gobject/gsignal.c line 3391
  • #5 g_signal_emit
    at ../../../../gobject/gsignal.c line 3447
  • #6 on_user_changed
    at act-user-manager.c line 690
  • #7 g_closure_invoke 
That fedora report seems similar
https://bugzilla.redhat.com/show_bug.cgi?id=1471186
Comment 1 Ondrej Holy 2017-08-04 12:22:17 UTC 
It seems it is happening quite often as per FAF:
https://retrace.fedoraproject.org/faf/reports/1660382/

+ Trace 237754

  • #0 um_carousel_select_item
    at um-carousel.c line 205
  • #1 reload_users
    at um-user-panel.c line 299
  • #6 on_user_changed
    at act-user-manager.c line 690 

See downstream bug report for the full trace...

So, some user was shown and then it has been changed, but it is not in carousel after reload and NULL is passed into um_carousel_select_item... however it is not clear to me why. System user accounts are skipped (act_user_is_system_accoun ), is it possible that the user account became system account? 

It might be relevant with Bug 773673.

Filipe, can you please look at?
Comment 2 Sebastien Bacher 2017-08-04 12:31:19 UTC 
in the Ubuntu case it's not after a change but on the live session every time, the code might have an issue with how the one user is set up though
Comment 3 André Klapper 2021-06-09 16:25:39 UTC 
GNOME is going to shut down bugzilla.gnome.org in favor of gitlab.gnome.org.
As part of that, we are mass-closing older open tickets in bugzilla.gnome.org
which have not seen updates for a longer time (resources are unfortunately
quite limited so not every ticket can get handled).

If you can still reproduce the situation described in this ticket in a recent
and supported software version, then please follow
  https://wiki.gnome.org/GettingInTouch/BugReportingGuidelines
and create a new bug report at
  https://gitlab.gnome.org/GNOME/gnome-control-center/-/issues/

Thank you for your understanding and your help.