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C-bugCategory: This is a bug.Category: This is a bug.P-mediumMedium priorityMedium priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.T-typesRelevant to the types team, which will review and decide on the PR/issue.Relevant to the types team, which will review and decide on the PR/issue.regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.Performance or correctness regression from one stable version to another.
Description
Code
I tried this code:
pub fn foo(_: &i32, _: &i32) {}
pub const _: [for<'r> fn(&'r i32, &'r i32); 2] = [foo, foo];
I expected to see this happen: compile successfully
Instead, this happened:
error[E0308]: mismatched types
--> src/lib.rs:3:56
|
3 | pub const _: [for<'r> fn(&'r i32, &'r i32); 2] = [foo, foo];
| ^^^ expected fn pointer, found fn item
|
= note: expected fn pointer `for<'r> fn(&'r _, &'r _)`
found fn item `for<'a, 'b> fn(&'a _, &'b _) {foo}`
For more information about this error, try `rustc --explain E0308`.
error: could not compile `fnitem` (lib) due to 1 previous error
Version it worked on
It most recently worked on: nightly-2024-02-29
Version with regression
searched nightlies: from nightly-2024-02-28 to nightly-2024-03-01
regressed nightly: nightly-2024-03-01
searched commit range: c475e23...878c8a2
regressed commit: 878c8a2 cc @spastorino
bisected with cargo-bisect-rustc v0.6.8
Host triple: x86_64-unknown-linux-gnu
Reproduce with:
cargo bisect-rustc --start=2024-02-28 --end=2024-03-01
@rustbot modify labels: +regression-from-stable-to-nightly -regression-untriaged
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Labels
C-bugCategory: This is a bug.Category: This is a bug.P-mediumMedium priorityMedium priorityT-compilerRelevant to the compiler team, which will review and decide on the PR/issue.Relevant to the compiler team, which will review and decide on the PR/issue.T-typesRelevant to the types team, which will review and decide on the PR/issue.Relevant to the types team, which will review and decide on the PR/issue.regression-from-stable-to-stablePerformance or correctness regression from one stable version to another.Performance or correctness regression from one stable version to another.