Eglot doesn't display errors when opening file, updates only when the buffer is saved

Question

Eglot doesn't display errors when opening file, updates only when the buffer is saved

thblt opened this issue 10 months ago · comments

Thibault Polge commented 10 months ago

The general issue is in the title: I need to save the current buffer for Eglot/flymake to add/update error overlays.

Steps to reproduce:

Create a Rust project somewhere with cargo init test, replace contents of the default src/main.rs with:
```
fn main() {
    let i = 3;
    println!("{}", i.baz);
}
```
From emacs -q (29.1 with latest eglot [1.15.0.20230819.140915] from elpa-devel), open that file, run M-x rust-ts-mode RET, then M-x eglot RET. If prompted for a server, choose rust-analyzer. (I sometimes get prompted, sometimes not, not sure why)
Notice that no error are reported.
Make any change in the file (just add a space at the end of the line), save. Observe that the .baz on line 3 is now underlined in red (as it should).
Delete the erroneous .baz on line 3.
Observe that underlining persists, flymake still reports the now-fixed error.
Save again. Underlining disappears (as it should).

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Thibault Polge · Answer 1 · Sun Aug 20 2023 21:54:44 GMT+0800 (China Standard Time)

OK, I tried to reproduce with a C source file and clangd, and couldn't, so the issue may be with rust-analyzer. NeoVim behaves exactly the same as Emacs here with the same Rust file (It originally didn't, because I forgot to disable an autosave plugin…). Closing for now, sorry for the noise, will reopen if anything can be done on eglot side.