From f7d06cae4c51802692f55eacad43b78cb69db22e Mon Sep 17 00:00:00 2001
From: David Tolnay <dtolnay@gmail.com>
Date: Fri, 29 May 2020 17:58:10 -0700
Subject: [PATCH] Add failing test involving macro_rules metavariable

---
 test_suite/tests/test_gen.rs | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/test_suite/tests/test_gen.rs b/test_suite/tests/test_gen.rs
index 288ba594..dc382b80 100644
--- a/test_suite/tests/test_gen.rs
+++ b/test_suite/tests/test_gen.rs
@@ -708,6 +708,17 @@ fn test_gen() {
         x: u8,
         y: u16,
     }
+
+    macro_rules! deriving {
+        ($field:ty) => {
+            #[derive(Deserialize)]
+            struct MacroRules<'a> {
+                field: $field,
+            }
+        };
+    }
+
+    deriving!(&'a str);
 }
 
 //////////////////////////////////////////////////////////////////////////