I tried this code:
pub fn look_ma_no_feature_gate<F: FnOnce() -> !>() {}I expected to see this happen: “error[E0658]: the ! type is experimental”
Instead, this happened: Successful compilation, as long as I'm using a nightly compiler, but the error when on stable 1.75.
This is incorrect because nightly features should always require #![feature] attributes on nightly (until they're stabilized, which hasn't happened yet for !).
Meta
rustc --version --verbose:
rustc 1.77.0-nightly (11f32b73e 2024-01-31)
binary: rustc
commit-hash: 11f32b73e0dc9287e305b5b9980d24aecdc8c17f
commit-date: 2024-01-31
host: x86_64-apple-darwin
release: 1.77.0-nightly
LLVM version: 17.0.6
@rustbot label +F-never_type +requires-nightly
I tried this code:
I expected to see this happen: “error[E0658]: the
!type is experimental”Instead, this happened: Successful compilation, as long as I'm using a nightly compiler, but the error when on stable 1.75.
This is incorrect because nightly features should always require
#![feature]attributes on nightly (until they're stabilized, which hasn't happened yet for!).Meta
rustc --version --verbose:@rustbot label +F-never_type +requires-nightly