thread 'rustc' panicked at 'called Result::unwrap() on an Err value: SourceNotAvailable · Issue #70724 · rust-lang/rust (original) (raw)

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Description

I'm seeing an internal compiler error on the following input (found by fuzz-rustc):

fn a() -> i32 {3}

pub fn main() { assert_eq!(a, 0); }

$ rustc main.rs
thread 'rustc' panicked at 'called `Result::unwrap()` on an `Err` value: SourceNotAvailable { filename: Real("/rustc/76b11980ad416c3ad6143504c2277757ecacf9b5/src/libcore/macros/mod.rs") }', src/librustc_typeck/check/op.rs:524:41
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

error: internal compiler error: unexpected panic

note: the compiler unexpectedly panicked. this is a bug.

note: we would appreciate a bug report: https://github.com/rust-lang/rust/blob/master/CONTRIBUTING.md#bug-reports

note: rustc 1.44.0-nightly (76b11980a 2020-04-01) running on x86_64-unknown-linux-gnu