On fullscreen errors, ensure some errors are able to be seen

[hyperupcall]

For example, for code in another repository, doing tty.fullscreen_init and automatically doing ty.fullscreen_deinit on EXIT will ensure that the cause for syntax errors are not shown properly (since the syntax error was printed in fullscreen mode). Maybe there is a way to print it again while still debugging

[hyperupcall]

idk why i added this