gdm-session-worker crashed with SIGTRAP in _g_log_abort() from g_logv() from g_log() from get_fallback_session_name() from get_session_filename() from gdm_session_is_wayland_session()

[Lyubomir]

https://errors.ubuntu.com/problem/55afdb022e0f09e32692656f5ec80985acf385cc

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I recently (for the last 3-4 days) had blinking cursor on boot of Ubuntu 19.10. I thought that it was due to some iwlwifi driver conflict error (https://bugs.launchpad.net/ubuntu/eoan/+source/linux/+bug/1846016), but it seemed that it was not from it. At one time i noticed on boot some red lines with gdm3 written on them, so i decided to apt purge and then install again gnome-shell. It seemed to work, but now errors pop up for me to report. I'm new to Linux, so i don't know the all internal workings of it (mainly the error catching practices).

ProblemType: Crash
DistroRelease: Ubuntu 19.10
Package: gdm3 3.34.0-1ubuntu1
ProcVersionSignature: Ubuntu 5.3.0-13.14-generic 5.3.0
Uname: Linux 5.3.0-13-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu7
Architecture: amd64
Date: Sun Sep 29 18:20:23 2019
ExecutablePath: /usr/lib/gdm3/gdm-session-worker
InstallationDate: Installed on 2019-07-23 (73 days ago)
InstallationMedia: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
ProcCmdline: gdm-session-worker\ [pam/gdm-password]
Signal: 5
SourcePackage: gdm3
StacktraceTop:
 ?? ()
 ?? ()
 ?? ()
 ?? ()
 ?? ()
Title: gdm-session-worker crashed with signal 5
UpgradeStatus: Upgraded to eoan on 2019-09-27 (7 days ago)
UserGroups:

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[Apport retracing service (apport)]

StacktraceTop:
 get_fallback_session_name ()
 get_session_filename ()
 gdm_session_is_wayland_session ()
 update_session_type ()
 gdm_session_setup_for_user ()

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Daniel van Vugt (vanvugt)]

Tracking in:
 https://errors.ubuntu.com/problem/55afdb022e0f09e32692656f5ec80985acf385cc

[Daniel van Vugt (vanvugt)]

See also bug 1717878