ICE: thread 'rustc' panicked at 'capacity overflow' · Issue #62554 · rust-lang/rust (original) (raw)

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Description

I'm seeing the following error on the nightly channel, but not on stable or beta:

$ echo "fn foo(u: u8) { if u8 macro_rules! u8 { (u6) => { fn uuuuuuuuuuu() { use s loo mod u8 {" > main.rs

$ rustc main.rs
error: this file contains an un-closed delimiter
 --> main.rs:1:89
  |
1 | fn foo(u: u8) { if u8 macro_rules! u8 { (u6) => { fn uuuuuuuuuuu() { use s loo mod u8 {
  |               -                       -         -                  -                  - ^
  |               |                       |         |                  |                  |
  |               |                       |         |                  |                  un-closed delimiter
  |               |                       |         |                  un-closed delimiter
  |               |                       |         un-closed delimiter
  |               un-closed delimiter     un-closed delimiter

thread 'rustc' panicked at 'capacity overflow', src/liballoc/raw_vec.rs:748:5
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace.
error: aborting due to previous error


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 1.38.0-nightly (0b680cfce 2019-07-09) running on x86_64-apple-darwin

Found with the help of libfuzzer-sys.