rustc-ap-rustc_error_codes 638.0.0

Automatically published version of the package `rustc_error_codes` in the rust-lang/rust repository from commit 30ca215b4e38b32aa7abdd635c5e2d56f5724494 The publishing script for this crate lives at: https://github.com/alexcrichton/rustc-auto-publish
Documentation 
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More than one `main` function was found.

Erroneous code example:

```compile_fail,E0136
fn main() {
    // ...
}

// ...

fn main() { // error!
    // ...
}
```

A binary can only have one entry point, and by default that entry point is the
`main()` function. If there are multiple instances of this function, please
rename one of them.