From b494d3e73dd17318032fa406f3deb73cc7b659ac Mon Sep 17 00:00:00 2001
From: Nicholas Nethercote <n.nethercote@gmail.com>
Date: Fri, 15 Aug 2025 09:13:23 +1000
Subject: [PATCH] Avoid unnecessary `mut`-ness for various closures.

---
 src/base.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/base.rs b/src/base.rs
index bc0a0f034b23..aefb9c9a1156 100644
--- a/src/base.rs
+++ b/src/base.rs
@@ -46,7 +46,7 @@ pub(crate) fn codegen_fn<'tcx>(
         with_no_trimmed_paths!({
             use rustc_middle::mir::pretty;
             let options = pretty::PrettyPrintMirOptions::from_cli(tcx);
-            pretty::write_mir_fn(tcx, mir, &mut |_, _| Ok(()), &mut buf, options).unwrap();
+            pretty::write_mir_fn(tcx, mir, &|_, _| Ok(()), &mut buf, options).unwrap();
         });
         String::from_utf8_lossy(&buf).into_owned()
     });