[Bug] MM dumps core after latest update

[jannekalliola]

Environment

MagicMirror² version: 2.35.0
Node version: v22.21.1
npm version: 10.9.4
Platform: Raspberry Pi3

Which start option are you using?

node --run start:x11

Are you using PM2?

Yes

Module

None

Have you tried disabling other modules?

• Yes
• No

Have you searched if someone else has already reported the issue on the forum or in the issues?

• Yes

What did you do?

Steps to reproduce the issue:
Update to the latest version (as of April 8th)
Restart MagicMirror (pm2 restart MagicMirror)
Wait until core file appears

What did you expect to happen?

MagicMirror should open without issues.

What actually happened?

MagicMirror dumps core each time it is started with pm2. If I start it on command line using node --run start:x11, it opens without issues.

Additional comments

No response

Participation

• I am willing to submit a pull request for this change.

[jannekalliola]

The upgrade process did not show any errors. Pm2 complains about deprecated util.isArray:

pi@raspberrypi:~ $ pm2 start MagicMirror
(node:5753) [DEP0044] DeprecationWarning: The util.isArray API is deprecated. Please use Array.isArray() instead.
(Use node --trace-deprecation ... to show where the warning was created)
[PM2] Applying action restartProcessId on app [MagicMirror](ids: [ 0 ])
[PM2] MagicMirror ✓
[PM2] Process successfully started
┌────┬────────────────────┬──────────┬──────┬───────────┬──────────┬──────────┐
│ id │ name │ mode │ ↺ │ status │ cpu │ memory │
├────┼────────────────────┼──────────┼──────┼───────────┼──────────┼──────────┤
│ 0 │ MagicMirror │ fork │ 16 │ online │ 0% │ 2.6mb │
└────┴────────────────────┴──────────┴──────┴───────────┴──────────┴──────────┘

[khassel]

see #4011 which is mentioned in the release notes.

[sdetweil]

How did you upgrade? Script or manual git pull?

[jannekalliola]

see #4011 which is mentioned in the release notes.

I'm using quite old Raspberry that is still in X11.

[jannekalliola]

How did you upgrade? Script or manual git pull?

Manual git pull and then node --run install-mm that run without issues.

[KristjanESPERANTO]

Just to be sure: Did you update the start command for MagicMirror in your PM2 setup (script or config) to the x11 version?

[jannekalliola]

Yes, after a few tries. It failed the same way with the old and new script.

[KristjanESPERANTO]

Could you share the output of pm2 show MagicMirror?

[jannekalliola]

Here's the output

pi@raspberrypi:~/MagicMirror $ pm2 show MagicMirror
Describing process with id 0 - name MagicMirror
┌───────────────────┬──────────────────────────────────────────┐
│ status │ online │
│ name │ MagicMirror │
│ namespace │ default │
│ version │ N/A │
│ restarts │ 0 │
│ uptime │ 2D │
│ script path │ /home/pi/MagicMirror.sh │
│ script args │ N/A │
│ error log path │ /home/pi/.pm2/logs/MagicMirror-error.log │
│ out log path │ /home/pi/.pm2/logs/MagicMirror-out.log │
│ pid path │ /home/pi/.pm2/pids/MagicMirror-0.pid │
│ interpreter │ bash │
│ interpreter args │ N/A │
│ script id │ 0 │
│ exec cwd │ /home/pi │
│ exec mode │ fork_mode │
│ node.js version │ N/A │
│ node env │ N/A │
│ watch & reload │ ✘ │
│ unstable restarts │ 0 │
│ created at │ 2026-04-08T18:39:27.942Z │
└───────────────────┴──────────────────────────────────────────┘
Divergent env variables from local env
┌────────────────┬──────────────────────────────────────────────┐
│ PWD │ /home/pi │
│ SSH_CONNECTION │ 192.168.1.48 50053 192.168.1.12 22 │
│ TERM │ dtterm │
│ XDG_SESSION_ID │ 4 │
│ SSH_CLIENT │ 192.168.1.48 50053 22 │
│ PATH │ /usr/local/sbin:/usr/local/bin:/usr/sbin:/us │
│ OLDPWD │ /home/pi/MagicMirror │
└────────────────┴──────────────────────────────────────────────┘

Add your own code metrics: http://bit.ly/code-metrics
Use pm2 logs MagicMirror [--lines 1000] to display logs
Use pm2 env 0 to display environment variables
Use pm2 monit to monitor CPU and Memory usage MagicMirror

[jannekalliola]

But now MM works after I rebooted the system. I'll close this ticket and reopen if it starts to dump core again.

[KristjanESPERANTO]

Yes, sometimes a reboot helps 😃