From 91aef00e51d9f7500b8d76bce0917138ffa00d2f Mon Sep 17 00:00:00 2001
From: Raminder Singh <romi_ssk@yahoo.co.in>
Date: Wed, 21 Jun 2023 16:54:54 +0530
Subject: [PATCH] Fix msg passed to span_bug

---
 compiler/rustc_expand/src/mbe/macro_rules.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/rustc_expand/src/mbe/macro_rules.rs b/compiler/rustc_expand/src/mbe/macro_rules.rs
index ee9616a0f0a..4a8a14994ff 100644
--- a/compiler/rustc_expand/src/mbe/macro_rules.rs
+++ b/compiler/rustc_expand/src/mbe/macro_rules.rs
@@ -535,7 +535,7 @@ pub fn compile_declarative_macro(
                     .pop()
                     .unwrap();
                 }
-                sess.parse_sess.span_diagnostic.span_bug(def.span, "wrong-structured lhs")
+                sess.parse_sess.span_diagnostic.span_bug(def.span, "wrong-structured rhs")
             })
             .collect::<Vec<mbe::TokenTree>>(),
         _ => sess.parse_sess.span_diagnostic.span_bug(def.span, "wrong-structured rhs"),