Error span for missing main function is too large

[lnicola]

I tried this code:

fn foo() {}
fn bar() {}
fn baz() {}

I expected to see this happen:

error[E0601]: `main` function not found in crate `hello`
 --> src/main.rs:4:1
3 | | fn baz() {}
4 | ^ consider adding a `main` function to `src/main.rs`

(or something similar -- an empty last line might be missing).

Instead, this happened:

error[E0601]: `main` function not found in crate `hello`
 --> src/main.rs:1:1
  |
1 | / fn foo() {}
2 | | fn bar() {}
3 | | fn baz() {}
  | |___________^ consider adding a `main` function to `src/main.rs`

This matters for IDE support, because using the whole file as an error span is a bit messy, marking potentially hundreds of lines as an error.

Meta

rustc --version:

rustc 1.49.0-nightly (91a79fb29 2020-10-07)

[euclio]

@rustbot claim

[0x8f701]

As you can see from the below screenshot, } is missing in line 4, but it mess up all:)

This is super bad for IDE experience

[lnicola]

@GopherJ that's a rust-analyzer parser recovery issue, completely unrelated to this one.

[dtolnay]

I don't know when I'll be able to return to this. Closing for now. #79086 (comment)

@rustbot release-assignment

[euclio]

Looks like this was fixed by #93142.

[dtolnay]

Indeed! Thanks for finding that.