iTerm2 crash when typing cmds like "ls" when "Show offscreen command line at top of session" functionality is enabled.

Crash report

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

• iTerm2 version: Each nightly build after implementation of "Show offscreen command line at top of session" functionality.
• OS version: macOS v12.6.3
• 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.debuglog.txt.zip
• Attach a screen capture video if it would make the reproduction steps clearer.
• Please attach the crash log.iTerm2-2023-03-07-092159.ips

PLEASE ATTACH YOUR PLIST FILE FOR BUG REPORTS! Seriously! I'll probably ask you for it if you don’t.

Detailed steps to reproduce the problem

1. Install iTerm2 nightly build >= iTerm2-3_5_20230110-nightly (a build that has "Show offscreen command line at top of session" functionality)
2. Type a typical cmd like "ls" or "ll", etc
3. iTerm2 crashes, crash log shows iTerm2 0x104573837 @objc iTermOffscreenCommandLine.init(characters:absoluteLineNumber:date:) + 71
4. If I disable the "Show offscreen command line at top of session" functionality iTerm2 no longer crashes.

What happened

iTerm2 crashes

What should have happened

iTerm2 should not crash

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