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Bug 1754867

Summary: gnome-shell crashes when pressing Ctrl+Super in a GTK application
Product: [Fedora] Fedora Reporter: Jonathan Haas <jonha87>
Component: mutterAssignee: Florian Müllner <fmuellner>
Status: CLOSED ERRATA QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: unspecified Docs Contact:
Priority: unspecified    
Version: 31CC: awilliam, fmuellner, fzatlouk, gnome-sig, jadahl, kparal, mcatanzaro+wrong-account-do-not-cc, otaylor, philip.wyett, robatino, walters
Target Milestone: ---   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: mutter-3.34.0-5.fc31 Doc Type: If docs needed, set a value
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2019-09-30 00:01:45 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 1644939    

Description Jonathan Haas 2019-09-24 09:20:57 UTC
Description of problem:
gnome-shell crashes when pressing Ctrl+Super in a GTK application

Version-Release number of selected component (if applicable):
mutter-3.34.0-3.fc31.x86_64

How reproducible: Always


Steps to Reproduce:

* Start a GNOME Wayland session
* Open a GTK application (tested with GNOME Terminal, Tilix, Dino, Thunderbird)
* Click on any text input field in the application to focus it
Press Ctrl+Super simultaneously

What happens:

* gnome-shell crashes

Tested with current mutter and gnome-shell releases (3.34.0) in Fedora 31 as well as their current master branches. Can't reproduce with Qt applications (neither native Wayland nor XWayland ones). Doesn't always trigger, try clicking into the text field and pressing the key combination a few times.

Expected results:

No crash

Comment 1 Jonathan Haas 2019-09-24 09:29:28 UTC
Proposing as a blocker, either under the data loss criterion or under default application functionality.

Note that there are a couple other major mutter issues related to keyboard input (that may or may not be related to this bug) and that is somewhat worrying:

https://gitlab.gnome.org/GNOME/mutter/issues/819
https://gitlab.gnome.org/GNOME/mutter/issues/820
https://gitlab.gnome.org/GNOME/mutter/issues/822

Comment 2 Adam Williamson 2019-09-24 15:01:45 UTC
Thanks for catching this. I think I'd be a weak +1 under the data loss criterion, as this is a pretty easy pair of keys to hit by mistake and we know that Shell crashing certainly can lead to data loss.

Comment 3 Michael Catanzaro 2019-09-25 20:52:06 UTC
I'm able to reproduce after 5-10 attempts at replication.

Unfortunately, all gnome-shell crashes are effectively impossible to debug right now. We need to solve bug #1748145 first, or we have no chance here.

Comment 4 Jonathan Haas 2019-09-26 07:21:39 UTC
There is already a patch at https://gitlab.gnome.org/GNOME/mutter/issues/823

Comment 5 Kamil Páral 2019-09-26 11:19:00 UTC
I've reproduced this trivially, my colleague as well. Certain +1 blocker from me.

Comment 6 František Zatloukal 2019-09-27 07:31:54 UTC
+1 blocker also from me.

Comment 7 Fedora Update System 2019-09-28 17:14:17 UTC
FEDORA-2019-94130905d5 has been submitted as an update to Fedora 31. https://bodhi.fedoraproject.org/updates/FEDORA-2019-94130905d5

Comment 8 Fedora Update System 2019-09-29 01:11:38 UTC
mutter-3.34.0-5.fc31 has been pushed to the Fedora 31 testing repository. If problems still persist, please make note of it in this bug report.
See https://fedoraproject.org/wiki/QA:Updates_Testing for
instructions on how to install test updates.
You can provide feedback for this update here: https://bodhi.fedoraproject.org/updates/FEDORA-2019-94130905d5

Comment 9 František Zatloukal 2019-09-29 20:57:08 UTC
mutter-3.34.0-5.fc31 fixes the issue.

Comment 10 Fedora Update System 2019-09-30 00:01:45 UTC
mutter-3.34.0-5.fc31 has been pushed to the Fedora 31 stable repository. If problems still persist, please make note of it in this bug report.