rust-lang / rust-lang/rust-analyzer
False negative: missing match arm when constant in trait
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@ChayimFriedman2 is already working on this.
Since Sep 17, 2026.
A-diagnostics
C-bug
- Dominant language
- Rust
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Description
rust-analyzer version: rust-analyzer 0.4.3037-standalone
rustc version: rustc 1.100.0-nightly (c54751567 2026-08-22)
editor or extension: Vim coc-rust-analyzer
code snippet to reproduce:
trait Bool<const B: bool> {
const B: bool = B;
}
impl<const B: bool, T: ?Sized> Bool<B> for T {}
fn main() {
match true {
<() as Bool<false>>::B => {},
}
}
Expect: missing match arm: true not covered
Actual: no diagnostics
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