1 files changed, 35 insertions, 0 deletions
diff --git a/src/test/ui/associated-types/associated-types-normalize-in-bounds.rs b/src/test/ui/associated-types/associated-types-normalize-in-bounds.rs
new file mode 100644
index 000000000..dcfae0f37
--- /dev/null
+++ b/src/test/ui/associated-types/associated-types-normalize-in-bounds.rs
@@ -0,0 +1,35 @@
+// run-pass
+#![allow(unused_variables)]
+// Test that we normalize associated types that appear in bounds; if
+// we didn't, the call to `self.split2()` fails to type check.
+
+// pretty-expanded FIXME #23616
+
+use std::marker::PhantomData;
+
+struct Splits<'a, T, P>(PhantomData<(&'a(),T,P)>);
+struct SplitsN<I>(PhantomData<I>);
+
+trait SliceExt2 {
+    type Item;
+
+    fn split2<'a, P>(&'a self, pred: P) -> Splits<'a, Self::Item, P>
+        where P: FnMut(&Self::Item) -> bool;
+    fn splitn2<'a, P>(&'a self, n: usize, pred: P) -> SplitsN<Splits<'a, Self::Item, P>>
+        where P: FnMut(&Self::Item) -> bool;
+}
+
+impl<T> SliceExt2 for [T] {
+    type Item = T;
+
+    fn split2<P>(&self, pred: P) -> Splits<T, P> where P: FnMut(&T) -> bool {
+        loop {}
+    }
+
+    fn splitn2<P>(&self, n: usize, pred: P) -> SplitsN<Splits<T, P>> where P: FnMut(&T) -> bool {
+        self.split2(pred);
+        loop {}
+    }
+}
+
+fn main() { }