diff options
Diffstat (limited to 'compiler')
| -rw-r--r-- | compiler/rustc_ast_lowering/src/lib.rs | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_ast_lowering/src/lib.rs b/compiler/rustc_ast_lowering/src/lib.rs index 446e02e4024..22a293d9b50 100644 --- a/compiler/rustc_ast_lowering/src/lib.rs +++ b/compiler/rustc_ast_lowering/src/lib.rs @@ -2034,7 +2034,9 @@ impl<'a, 'hir> LoweringContext<'a, 'hir> { } fn lower_array_length_to_const_arg(&mut self, c: &AnonConst) -> &'hir hir::ConstArg<'hir> { - match c.value.kind { + // We cannot just match on `ExprKind::Underscore` as `(_)` is represented as + // `ExprKind::Paren(ExprKind::Underscore)` and should also be lowered to `GenericArg::Infer` + match c.value.peel_parens().kind { ExprKind::Underscore => { if !self.tcx.features().generic_arg_infer() { feature_err( |