Span for "unexpected end of macro invocation" is terrible

[bblum]

foo.rs:1:0: 1:0 error: Unexpected end of macro invocation
foo.rs:1 fn main() {
         ^

The error also should not be capitalized.

[huonw]

Still an issue. Test case:

fn main() {
    assert!()
}

[Gankra]

Still an issue.

[vklquevs]

This had me scratching my head for a bit, too:

// a.rs
mod b;
fn main(){}

// b.rs
macro_rules! bar { }
macro_rules! foo {
    () => (bar!());
}

$ rustc a.rs
<command line option> error: unexpected end of macro invocation
a.rs:1 // a.rs

[solson]

I ran into this when I tried to use println!() to print just a newline. Worse, I had an unrelated macro_rules at the start of the file, which the error message pointed to. 😞

[ghost]

Yes calling println!() without any arguments results in:

Harrisons-MacBook-Pro:src harrisongould$ cargo run
   Compiling obj-loader v0.1.0 (file:///Users/harrisongould/Documents/obj-loader)
main.rs:1:1: 1:1 error: unexpected end of macro invocation
main.rs:1 use std::error::Error;
          ^
Could not compile `obj-loader`.

To learn more, run the command again with --verbose.

I can show the entire program, but this error seems to always refer to the first line.

[LukasKalbertodt]

Still an issue:

fn main() {
    try!()
}

[TimNN]

I'll give this a go and should have a pull request ready soon.