From 1ed0cbf698bbed4135eb4e47c4ac22a907dd41e9 Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Fri, 13 Jun 2025 12:59:25 -0700
Subject: [PATCH] Preserve Paren expression's attributes during Unparenthesize

---
 tests/ui-fulldeps/pprust-parenthesis-insertion.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tests/ui-fulldeps/pprust-parenthesis-insertion.rs b/tests/ui-fulldeps/pprust-parenthesis-insertion.rs
index 90e07bed40e7..6ac079ae4342 100644
--- a/tests/ui-fulldeps/pprust-parenthesis-insertion.rs
+++ b/tests/ui-fulldeps/pprust-parenthesis-insertion.rs
@@ -158,7 +158,12 @@ struct Unparenthesize;
 impl MutVisitor for Unparenthesize {
     fn visit_expr(&mut self, e: &mut Expr) {
         while let ExprKind::Paren(paren) = &mut e.kind {
+            let paren_attrs = mem::take(&mut e.attrs);
             *e = mem::replace(paren, Expr::dummy());
+            if !paren_attrs.is_empty() {
+                assert!(e.attrs.is_empty());
+                e.attrs = paren_attrs;
+            }
         }
         mut_visit::walk_expr(self, e);
     }