diff options
Diffstat (limited to 'compiler/rustc_const_eval/src')
| -rw-r--r-- | compiler/rustc_const_eval/src/check_consts/mod.rs | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/compiler/rustc_const_eval/src/check_consts/mod.rs b/compiler/rustc_const_eval/src/check_consts/mod.rs index 659d4a30456..607cb2e497d 100644 --- a/compiler/rustc_const_eval/src/check_consts/mod.rs +++ b/compiler/rustc_const_eval/src/check_consts/mod.rs @@ -94,6 +94,11 @@ pub fn rustc_allow_const_fn_unstable( /// world into two functions: those that are safe to expose on stable (and hence may not use /// unstable features, not even recursively), and those that are not. pub fn is_fn_or_trait_safe_to_expose_on_stable(tcx: TyCtxt<'_>, def_id: DefId) -> bool { + // A default body in a `#[const_trait]` is const-stable when the trait is const-stable. + if tcx.is_const_default_method(def_id) { + return is_fn_or_trait_safe_to_expose_on_stable(tcx, tcx.parent(def_id)); + } + match tcx.lookup_const_stability(def_id) { None => { // In a `staged_api` crate, we do enforce recursive const stability for all unmarked |