1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/type-alias-impl-trait/different_defining_uses_never_type.rs b/tests/ui/type-alias-impl-trait/different_defining_uses_never_type.rs
new file mode 100644
index 000000000..0b8157fe3
--- /dev/null
+++ b/tests/ui/type-alias-impl-trait/different_defining_uses_never_type.rs
@@ -0,0 +1,18 @@
+#![feature(type_alias_impl_trait)]
+
+fn main() {}
+
+// two definitions with different types
+type Foo = impl std::fmt::Debug;
+
+fn foo() -> Foo {
+    ""
+}
+
+fn bar() -> Foo { //~ ERROR: concrete type differs from previous defining opaque type use
+    panic!()
+}
+
+fn boo() -> Foo {
+    loop {}
+}