From f223affd7ae383816a038700d591d78bebd98d46 Mon Sep 17 00:00:00 2001
From: Mara Bos <m-ou.se@m-ou.se>
Date: Thu, 4 Mar 2021 19:36:36 +0100
Subject: [PATCH] Don't consume the expression in assert_matches!()'s failure
 case.

---
 library/core/src/macros/mod.rs | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/library/core/src/macros/mod.rs b/library/core/src/macros/mod.rs
index b0b35c6915f99..fb43433a79465 100644
--- a/library/core/src/macros/mod.rs
+++ b/library/core/src/macros/mod.rs
@@ -141,9 +141,9 @@ macro_rules! assert_matches {
     ($left:expr, $( $pattern:pat )|+ $( if $guard: expr )? $(,)?) => ({
         match $left {
             $( $pattern )|+ $( if $guard )? => {}
-            left_val => {
+            ref left_val => {
                 $crate::panicking::assert_matches_failed(
-                    &left_val,
+                    left_val,
                     $crate::stringify!($($pattern)|+ $(if $guard)?),
                     $crate::option::Option::None
                 );
@@ -153,9 +153,9 @@ macro_rules! assert_matches {
     ($left:expr, $( $pattern:pat )|+ $( if $guard: expr )?, $($arg:tt)+) => ({
         match $left {
             $( $pattern )|+ $( if $guard )? => {}
-            left_val => {
+            ref left_val => {
                 $crate::panicking::assert_matches_failed(
-                    &left_val,
+                    left_val,
                     $crate::stringify!($($pattern)|+ $(if $guard)?),
                     $crate::option::Option::Some($crate::format_args!($($arg)+))
                 );