Auto merge of #3223 - rust-lang:rustup-2023-12-12, r=RalfJung

Automatic Rustup

1 files changed, 5 insertions, 3 deletions

diff --git a/compiler/rustc_ast_lowering/src/expr.rs b/compiler/rustc_ast_lowering/src/expr.rs
index 99691f43f91..a44b408feec 100644
--- a/compiler/rustc_ast_lowering/src/expr.rs
+++ b/compiler/rustc_ast_lowering/src/expr.rs
@@ -8,7 +8,6 @@ use super::errors::{
 use super::ResolverAstLoweringExt;
 use super::{ImplTraitContext, LoweringContext, ParamMode, ParenthesizedGenericArgs};
 use crate::{FnDeclKind, ImplTraitPosition};
-use rustc_ast::attr;
 use rustc_ast::ptr::P as AstP;
 use rustc_ast::*;
 use rustc_data_structures::stack::ensure_sufficient_stack;
@@ -582,8 +581,11 @@ impl<'hir> LoweringContext<'_, 'hir> {
         } else {
             // Either `body.is_none()` or `is_never_pattern` here.
             if !is_never_pattern {
-                let suggestion = span.shrink_to_hi();
-                self.tcx.sess.emit_err(MatchArmWithNoBody { span, suggestion });
+                if self.tcx.features().never_patterns {
+                    // If the feature is off we already emitted the error after parsing.
+                    let suggestion = span.shrink_to_hi();
+                    self.tcx.sess.emit_err(MatchArmWithNoBody { span, suggestion });
+                }
             } else if let Some(body) = &arm.body {
                 self.tcx.sess.emit_err(NeverPatternWithBody { span: body.span });
                 guard = None;