Bug 2430324

Summary: Thunderbird crashes on x86_64 after the update to thunderbird-0:146.0.1-3.fc42.x86_64
Product: [Fedora] Fedora Reporter: Stu G <pale.lid1986>
Component: thunderbirdAssignee: Jan Horak <jhorak>
Status: NEW --- QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: urgent Docs Contact:
Priority: unspecified    
Version: 42CC: awilliam, jhorak, klaas, rstrode, suraj.ghimire7
Target Milestone: ---Keywords: Desktop, Regression
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Description Flags
Stack trace
none
Thunderbird plugin info none

Description Stu G 2026-01-16 08:21:00 UTC 
A segmentation fault occurs on running thunderbird-0:146.0.1-3.fc42.x86_64.
This has occurred since the first update to 146 and hasn't been fixed with recent patches.

Reproducible: Always

Steps to Reproduce:
1.Type thunderbird at the console or use the GUI menu
Actual Results:
Thunderbird does not start.
Console reports "Segmentation fault (core dumped)".
No data is lost.

Expected Results:
Thunderbird starts and works ok.

Additional Information:
This occurs on two different machines running Workstation and KDE. Both machines are essentially stock with minimal customisation.
There are no add-ons or extensions to Thunderbird.
The mail profiles are stored on a remote NAS, accessed by automounting the CIFS share with systemd.
Downgrading to thunderbird-0:128.8-1.fc42 works.
Stack trace and plugin info will be attached.
A discussion page has been raised:
https://discussion.fedoraproject.org/t/thunderbird-crashes-on-x86-64-even-after-the-update-to-thunderbird-0-146-0-1-3-fc42-x86-64/179581
Comment 1 Stu G 2026-01-16 08:23:05 UTC 
Created attachment 2122330 [details]
Stack trace

Stack trace generated by gdb according to this guide:
https://docs.fedoraproject.org/en-US/quick-docs/troubleshooting-mozilla-products/
Comment 2 Stu G 2026-01-16 08:25:27 UTC 
Created attachment 2122331 [details]
Thunderbird plugin info

Extra info on Thunderbird plugins generated using the method described here
https://docs.fedoraproject.org/en-US/quick-docs/troubleshooting-mozilla-products/
Comment 3 Adam Williamson 2026-01-19 22:46:53 UTC 
From forum thread: https://discussion.fedoraproject.org/t/thunderbird-crashes-on-x86-64-even-after-the-update-to-thunderbird-0-146-0-1-3-fc42-x86-64/179581/4

I wondered if this might be caused by the NVIDIA proprietary driver, but Stu tried with nouveau and it's still crashing.
Comment 4 Stu G 2026-03-06 07:19:19 UTC 
Tested again with new version 147.0-6.fc42.
No joy, same problem exists.
Comment 5 Stu G 2026-03-08 04:36:38 UTC 
The issue is due to the mail profiles being stored on a remote NAS file share.
Using a local mail profile works OK and doesn't cause the segfault.
The remote file share is mounted using systemd.
Remote profiles have always worked previously and only broke with the recent update to version 146. Hoping this can be fixed please.

Here's an example of my Thunderbird .profile
    [Profile0]
    Name=My_email
    IsRelative=0
    Path=/home/stu/remoteshare/email/xxxxxxxx.default-esr
    Default=1

Here is an example of the mount file at /etc/systemd/system/home-stu-remoteshare.mount
   [Unit]
   Description=mounting remoteshare folder on NAS
   Requires=network-online.target
   After=network-online.service

   [Mount]
   What=//192.168.xx.xx/homes/remoteshare
   Where=/home/stu/remoteshare
   Type=cifs
   Options=rw,uid=1000,gid=1000,credentials=/home/stu/.credentials

   [Install]
   WantedBy=multi-user.target

Here is an example of the automount file at /etc/systemd/system/home-stu-remoteshare.automount
   [Unit]
   Description=automount remoteshare folder on NAS
   Requires=network-online.target
   After=network-online.service

   [Automount]
   Where=/home/stu/remoteshare
   TimeoutIdleSec=60

   [Install]
   WantedBy=multi-user.target