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Print a backtrace in const eval if interrupted by saethlin · Pull Request #11176...

 1 month ago
source link: https://github.com/rust-lang/rust/pull/111769
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Demo:

#![feature(const_eval_limit)]
#![const_eval_limit = "0"]

const OW: u64 = {
    let mut res: u64 = 0;
    let mut i = 0;
    while i < u64::MAX {
        res = res.wrapping_add(i);
        i += 1;
    }
    res
};

fn main() {
    println!("{}", OW);
}
╭ ➜ ben@archlinux:~/rust
╰ ➤ rustc +stage1 spin.rs 
^Cerror[E0080]: evaluation of constant value failed
 --> spin.rs:8:33
  |
8 |         res = res.wrapping_add(i);
  |                                 ^ Compilation was interrupted

note: erroneous constant used
  --> spin.rs:15:20
   |
15 |     println!("{}", OW);
   |                    ^^

note: erroneous constant used
  --> spin.rs:15:20
   |
15 |     println!("{}", OW);
   |                    ^^
   |
   = note: this note originates in the macro `$crate::format_args_nl` which comes from the expansion of the macro `println` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to previous error

For more information about this error, try `rustc --explain E0080`.

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