microsoft / microsoft/terminal

Resizing window when running python TUI app results in crash

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#14,079 0 comments 0 reactions 0 assignees View on GitHub
Area-AtlasEngine Issue-Bug Needs-Repro Needs-Tag-Fix Product-Terminal
Dominant language
C++
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Description

### Windows Terminal version

1.16.2641.0

### Windows build number

10.0.190044.1889

### Other Software

python 3.10.6
prompt_toolkit 3.0.30

### Steps to reproduce

In my prompt_toolkit python app, if I vigorously resize the terminal window it eventually crashes. This only happens with Atlas Engine enabled in settings. Attaching Visual Studio points to a memory related issue.

Iv'e had trouble making my python program smaller and still exhibit the problem, so I am unable to share it at the moment. I can reproduce it easily though. It does use an emoji (), but nothing special as far as I know other than that.

Attached a few different backtraces:
[bt1.txt](https://github.com/microsoft/terminal/files/9646551/bt1.txt)
[bt2.txt](https://github.com/microsoft/terminal/files/9646552/bt2.txt)
[bt3.txt](https://github.com/microsoft/terminal/files/9646553/bt3.txt)
[bt4.txt](https://github.com/microsoft/terminal/files/9646554/bt4.txt)
[bt5.txt](https://github.com/microsoft/terminal/files/9646555/bt5.txt)

The small program I tried to reproduce this bug with is here, it does not quite do it though but should be close:
https://gist.github.com/sandos/fc1ae1d5abf0e9609228b18766a49612

### Expected Behavior

No crash on resizing window.

### Actual Behavior

Windows Terminal Preview crashes silently.

Contributor guide

Open the contributing guide

Research direction

Start by reviewing the attached bt1.txt through bt5.txt backtraces and the linked gist reproduction, then try reproducing the crash while vigorously resizing a Windows Terminal window with Atlas Engine enabled. Done means identifying and fixing the memory-related crash so resizing no longer terminates Windows Terminal.

Written by the indexing model from the issue text.

Assessment

Tech stack
cpp, python
Domain
cli, desktop
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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