How to debug program when there's a TUI?

[Squirrelcoding]

I'm fairly new to systems programming and I was wondering how you debug when there's a TUI where errors normally go. Normally the error would be logged to the standard output but the TUI is in the way! I don't know how to display errors somewhere else such as a log file, so can anybody help me out here?

TL:DR; Since the TUI is in the way, how can I see errors?

[gyscos]

Hi!

To debug, you have a few main options:

• Debug from inside the application itself. This means print messages to a popup layer or something. You can also use cursive's own basic debug console, or flexi logger, a third-party library with much more features.
• You can debug the application in gdb or similar debuggers like you would a non-TUI application. You can then set breakpoints and debug the logic step by step, looking at the values or variables, ...
• You can redirect the standard error stream to a file, and check this file from a separate terminal. To do that, you would do something like cargo run 2> error_file.txt, and tail -F error_file.txt in another terminal.