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Internal Compiler Error: 'assertion failed: (left != right) at compiler/rustc_parse/src/parser/ty.rs:324:9 #84148
Description
rustc panics on the following input, found by fuzz-rustc:
fn f(t:for<>t?$ rustc bug.rs
error: this file contains an unclosed delimiter
--> bug.rs:1:16
|
1 | fn f(t:for<>t?
| - ^
| |
| unclosed delimiter
thread 'rustc' panicked at 'assertion failed: `(left != right)`
left: `Token { kind: Question, span: bug.rs:1:14: 1:15 (#0) }`,
right: `Question`', compiler/rustc_parse/src/parser/ty.rs:324:9
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/issues/new?labels=C-bug%2C+I-ICE%2C+T-compiler&template=ice.md
note: rustc 1.53.0-nightly (a86612456 2021-04-11) running on x86_64-unknown-linux-gnu
query stack during panic:
end of query stack
error: aborting due to previous error
Activity
dwrensha commentedon Apr 13, 2021
This is a regression, introduced in #67820.
(Thanks cargo-bisect-rustc!)
cc @ecstatic-morse
dwrensha commentedon Apr 13, 2021
The ICE still happens if you close the parens:
apiraino commentedon Apr 14, 2021
Assigning priority as discussed as part of the Prioritization Working Group procedure and removing
I-prioritize.@rustbot label -I-prioritize +P-low
Add 84148
Add 84148
Rollup merge of rust-lang#86010 - FabianWolff:ICE-parser, r=varkor