https://github.com/rust-lang/rust http://git.dreamy.place/mirrors/rust/atom?h=master 2024-03-21T00:03:59+00:00 2024-03-21T00:03:59+00:00 Esteban Küber esteban@kuber.com.ar 2024-03-21T00:03:59+00:00 urn:sha1:6b24fdf8113d5f422bfaeff7071d8251a13468b1 ``` error: unconstrained generic constant --> $DIR/const-argument-if-length.rs:18:10 | LL | pad: [u8; is_zst::<T>()], | ^^^^^^^^^^^^^^^^^^^ | help: try adding a `where` bound | LL | pub struct AtLeastByte<T: ?Sized> where [(); is_zst::<T>()]: { | ++++++++++++++++++++++++++ ``` Detect when the constant expression isn't `usize` and suggest casting: ``` error: unconstrained generic constant --> f300.rs:6:10 | 6 | bb::<{!N}>(); | ^^^^ -Ztrack-diagnostics: created at compiler/rustc_trait_selection/src/traits/error_reporting/type_err_ctxt_ext.rs:3539:36 | help: try adding a `where` bound | 5 | fn b<const N: bool>() where [(); {!N} as usize]: { | ++++++++++++++++++++++++++ ``` Fix #122395.