iTerm2 UI hangs

Bug report

Thanks for filing an issue! Please answer the questions below so I can help you.

• iTerm2 version: Build 3.4.15

• OS version: macOS 12.1 (arm64)

• Attach ~/Library/Preferences/com.googlecode.iterm2.plist here (drag-drop from finder into this window) com.googlecode.iterm2.plist

• Attach a debug log, if possible.

• Attach a screen capture video if it would make the reproduction steps clearer.

Detailed steps to reproduce the problem

Apologies, I have not found a way to reliably reproduce this as it happens sporadically. In short, after using latest version of iTerm2 for a while (varying amounts of time), the UI freezes and does not respond to any input. There is not a beachball, but the menubar does not respond.

I have attached 2 separate sample outputs for the issue. I took the samples after the freeze by taking the following steps:

1. See that iTerm ui freezes after a certain amount of usage (sorry, I know, useless repro info)
2. Open Terminal.app and ps -ef | grep iTerm, then sample <pid of iTerm UI> -file iterm.sample
3. Cmd-tab to the (fullscreen iTerm) and click randomly, hit keyboard etc.
4. save sample
5. Force-quit iTerm.
6. Restart iTerm

What happened

The iTerm UI did not respond. When restarting iTerm, the session "layout" was not saved, though the underlying terminal sessions were recovered.

Samples:

• item2-hang-sample.txt

• iterm2.2.sample.txt

What should have happened

The UI should not have frozen. Ideally the layout of the session would be restored after force quit.

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