Fix empty trim_newline panic, add impl macro test

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/source/impls.rs b/tests/source/impls.rs
index c15ae12325e..4382c4fd0e6 100644
--- a/tests/source/impls.rs
+++ b/tests/source/impls.rs
@@ -51,3 +51,10 @@ mod b {
         }
     }
 }
+
+impl Foo { add_fun!(); }
+
+impl Blah {
+    fn boop() {}
+    add_fun!();
+}