1 files changed, 33 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-69683.rs b/tests/ui/issues/issue-69683.rs
new file mode 100644
index 000000000..7a76e9ef2
--- /dev/null
+++ b/tests/ui/issues/issue-69683.rs
@@ -0,0 +1,33 @@
+pub trait Element<S> {
+    type Array;
+}
+
+impl<T> Element<()> for T {
+    type Array = T;
+}
+
+impl<T: Element<S>, S> Element<[S; 3]> for T {
+    type Array = [T::Array; 3];
+}
+
+trait Foo<I>
+where
+    u8: Element<I>,
+{
+    fn foo(self, x: <u8 as Element<I>>::Array);
+}
+
+impl<I> Foo<I> for u16
+where
+    u8: Element<I>,
+{
+    fn foo(self, _: <u8 as Element<I>>::Array) {}
+}
+
+fn main() {
+    let b: [u8; 3] = [0u8; 3];
+
+    0u16.foo(b); //~ ERROR type annotations needed
+    //~^ ERROR type annotations needed
+    //<u16 as Foo<[(); 3]>>::foo(0u16, b);
+}