gnome-shell crashed with SIGSEGV in shell_app_dispose() from g_object_unref() from g_hash_table_remove_node() from g_hash_table_remove_internal() from _shell_app_system_notify_app_state_changed() from shell_app_state_transition() from _shell_app_remove_window()

[RussianNeuroMancer]

Original bugreport: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1789644

ProblemType: Crash
DistroRelease: Ubuntu 18.10
Package: gnome-shell 3.29.90-2ubuntu1
Uname: Linux 4.18.3-041803-generic x86_64
ApportVersion: 2.20.10-0ubuntu9
Architecture: amd64
CurrentDesktop: GNOME
Date: Thu Aug 30 23:19:18 2018
DisplayManager: gdm3
ExecutablePath: /usr/bin/gnome-shell
InstallationDate: Installed on 2018-04-20 (132 days ago)
InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20180105.1)
ProcCmdline: /usr/bin/gnome-shell
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7fb834684b6f: mov (%rax),%rsi
 PC (0x7fb834684b6f) ok
 source "(%rax)" (0x00000000) not located in a known VMA region (needed readable region)!
 destination "%rsi" ok
SegvReason: reading NULL VMA
Signal: 11
SourcePackage: gnome-shell
StacktraceTop:
 ?? () from /usr/lib/gnome-shell/libgnome-shell.so
 g_object_unref () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libglib-2.0.so.0
 _shell_app_system_notify_app_state_changed () from /usr/lib/gnome-shell/libgnome-shell.so
Title: gnome-shell crashed with SIGSEGV in g_object_unref()
UpgradeStatus: Upgraded to cosmic on 2018-04-20 (132 days ago)
UserGroups: adm cdrom dialout dip lpadmin plugdev sambashare sudo tty

[Apport retracing service (apport)]

StacktraceTop:
 shell_app_dispose (object=0x5654b1c61840) at ../src/shell-app.c:1485
 g_object_unref (_object=0x5654b1c61840) at ../../../../gobject/gobject.c:3309
 g_hash_table_remove_node (hash_table=0x5654a9a39360, i=<optimized out>, notify=<optimized out>) at ../../../../glib/ghash.c:459
 g_hash_table_remove_internal (hash_table=0x5654a9a39360, key=0x5654b1c61840, notify=1) at ../../../../glib/ghash.c:1376
 _shell_app_system_notify_app_state_changed (self=0x5654a977e120, app=app@entry=0x5654b1c61840) at ../src/shell-app-system.c:375

[Daniel van Vugt (vanvugt)]

I can't find any other reports of this crash yet.

You do seem to have a few extensions installed:

b'org.gnome.shell' b'enabled-extensions' b"['<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>', '<email address hidden>']"

Please try removing all of them and see if that fixes the problem. If so then we would need to find out which extension it is.

[RussianNeuroMancer (russianneuromancer)]

> Please try removing all of them and see if that fixes the problem.

I didn't try to remove all extension, but disabled all extensions instead - issue is still reproducible. Is it sufficient?

[Daniel van Vugt (vanvugt)]

Thank you for reporting this bug to Ubuntu.
Ubuntu 18.10 (cosmic) reached end-of-life on July 18, 2019.

See this document for currently supported Ubuntu releases:
https://wiki.ubuntu.com/Releases

We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. If you then find the bug is still present in the newer Ubuntu version, please add a comment here telling us which new version it is in and change the bug status to Confirmed.