Zombie processes on 1.5.0 beta

[floorish]

Recently I've received errors when opening new Terminals:

[forkpty: Resource temporarily unavailable]
Could not create a new process and open a pseudo-tty.

While investigate if this was caused by exceeding the max number of processes I noticed that there were a lot of zombie processes (thousands):

$ ps -axo pid,ppid,state,command | grep defunct
114  1436 Z    <defunct>
115  1436 Z    <defunct>
156  1436 Z    <defunct>
194  1436 Z    <defunct>
....
99943  1436 Z    <defunct>
99946  1436 Z    <defunct>
99998  1436 Z    <defunct>

Which were caused by GitUp:

$ ps -p 1436 -o pid,ppid,command
PID  PPID COMMAND
1436     1 /Applications/GitUp.app/Contents/MacOS/GitUp

This happens using 1.5.0 beta on macOS 15 Sequoia. I can reproduce it by launching GitUp and opening some specific repository, this causes a zombie process to show up. Closing the window and opening the same repo gives another zombie process, etc. Some repos are not affected, I'm not sure what exactly triggers this. Will try to do some more tests to see if I can narrow it down.

Reverting to 1.4.3 stable release seems to fix the issue.

[lucasderraugh]

Hmm, I'm not sure what that would be. I'll keep an on eye on it myself. Thanks.

[floorish]

I'm able to reproduce the issue with the following minimal steps:

1. Create a new repo with ssh remote (doesn't matter if remote actually exists):

git init test
cd test
git remote add origin git@github.com:test

2. Open the test repo in GitUp 1.5.0
3. Confirm there is a zombie process

$ ps -axo pid,ppid,state,command | grep defunct
5694  5693 Z    <defunct>

Seems like it's related to the ssh remote. Remotes defined with https:// seem to work fine.
I've confirmed these steps on a fresh macOS Tahoe 26.4.1 vm.

Edit:

• Explicitly using the ssh:// prefix also seems to work fine: git remote add origin ssh://git@github.com:test
• Only the alphabetically first remote seems affected:
  This is ok:

git remote add a https://github.com:test
git remote add origin git@github.com:test

Causes zombie process on open:

git remote add x https://github.com:test
git remote add origin git@github.com:test

(oops I misclicked and closed the issue 🙈)

[Cykelero]

I wonder if this is linked to the bug we had when updating libgit2, where it would sometimes kill the GitUp process. Maybe it was actually trying to kill a subprocess it had created, and the fact that it's failing/being prevented is what's causing the zombies.