rust-format-buffer turns unicode symbols into whitespace

[bepzi]

With (setq rust-format-on-save t), the following code:

let номер = 42;

becomes:

let       = 42;

After saving the file.

[tromey]

Could you try rustfmt outside of emacs and see if it still fails?

[bepzi]

cargo fmt and rustup run nightly rustfmt work as expected.

[brotzeit]

I think we need to do (set-process-coding-system process 'utf-8-emacs-unix 'utf-8-emacs-unix).

[nealsid]

Repro (on Emacs 30.1 on Windows):

1. Create a new buffer with some Unicode characters, such as "a—👍"
2. M-x eval-expression or M-S-: in that buffer with the following expression:

(call-process-region nil (point-max) "cat" t t)

The Unicode characters should disappear. If you evaluate the following expression instead, it works correctly:

(let ((coding-system-for-write 'utf-8-unix) (coding-system-for-read 'utf-8-unix)) (call-process-region nil (point-max) "cat" t t))

[nealsid]

You can set the coding system when running rustfmt with the following, which works for me:

(add-to-list 'process-coding-system-alist '("rustfmt" . utf-8-unix))