1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/different_defining_uses.rs b/src/test/ui/type-alias-impl-trait/different_defining_uses.rs
new file mode 100644
index 000000000..4505c4d95
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/different_defining_uses.rs
@@ -0,0 +1,15 @@
+#![feature(type_alias_impl_trait)]
+
+fn main() {}
+
+// two definitions with different types
+type Foo = impl std::fmt::Debug;
+
+fn foo() -> Foo {
+    ""
+}
+
+fn bar() -> Foo {
+    42i32
+    //~^ ERROR concrete type differs from previous
+}