1 files changed, 10 insertions, 0 deletions
diff --git a/tests/02-not-impl.stderr b/tests/02-not-impl.stderr
new file mode 100644
index 0000000..a81e390
--- /dev/null
+++ b/tests/02-not-impl.stderr
@@ -0,0 +1,10 @@
+error: proc macro panicked
+ --> $DIR/02-not-impl.rs:5:1
+  |
+5 | / impl_trait! {
+6 | |     struct Foo {
+7 | |     }
+8 | | }
+  | |_^
+  |
+  = help: message: impl_trait! may only be applied to inherent impls