macOS: input breaks output in many ways

[Atemu]

This is how mlterm looks after typing few ls into it on macOS 12:

Safe to say, this makes mlterm unusable.

Is anyone able to reproduce this?

[arakiken]

I test mlterm-cocoa in MacOS 10.13 or before, and it works fine. I have no machines to install MacOS 12 and it is difficult to prepare a test environment to reproduce this problem for now.

Thinking about trying to fix it in the future, can you let me make sure of some things?

• Which version do you use ? (mlterm-3.9.1 ?)
• Do you build and install it from source code?
• Does this problem happen if you remove all configurations in ~/.mlterm/ ?
• Is this screen corruption improved by selecting text with the mouse pointer?
• If you type "ls", what happens?

[Atemu]

Hi, thanks for taking a look!

I have no machines to install MacOS 12 and it is difficult to prepare a test environment to reproduce this problem for now.

I see.

FYI, you can get a modern macOS without modern mac hardware using https://github.com/kholia/OSX-KVM from a Linux host with an AVX2-capable CPU.

• 3.9.2 but the bug also existed on 3.9.1 (tested on Catalina and Big Sur)
• Yes. Here is the Nix expression used: https://github.com/NixOS/nixpkgs/blob/master/pkgs/applications/terminal-emulators/mlterm/default.nix, you don't need to fully understand it but you should get the gist.
• Yes, same issues.
• When selecting, it switches to one of the ~3 states of brokeness
• Typing ls:

  (Enter):

  

  It's inconsistent though, this is what can also happen after entering ls (triggered by repeating it a few times):

  

[arakiken]

Thanks. Does this behavior change if you change "#if MAC_OS_X_VERSION_MAX_ALLOWED >= 101400" in cocoa.m to "#if 0" or "#if 1" ? https://github.com/arakiken/mlterm/blob/master/uitoolkit/quartz/cocoa.m#L17

[Atemu]

Nothing changes unfortunately.

[Atemu]

This seems to have been a caused by our old apple SDK. Using version 11 fixes the issue.