1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/specialization/issue-50452-fail.rs b/src/test/ui/specialization/issue-50452-fail.rs
new file mode 100644
index 000000000..fe21e9b6e
--- /dev/null
+++ b/src/test/ui/specialization/issue-50452-fail.rs
@@ -0,0 +1,21 @@
+#![feature(specialization)]
+//~^ WARN the feature `specialization` is incomplete
+
+pub trait Foo {
+    fn foo();
+}
+
+impl Foo for i32 {}
+impl Foo for i64 {
+    fn foo() {}
+    //~^ERROR `foo` specializes an item from a parent `impl`
+}
+impl<T> Foo for T {
+    fn foo() {}
+}
+
+fn main() {
+    i32::foo();
+    i64::foo();
+    u8::foo();
+}