1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/rfc-2632-const-trait-impl/issue-100222.rs b/src/test/ui/rfc-2632-const-trait-impl/issue-100222.rs
new file mode 100644
index 000000000..1004bb28c
--- /dev/null
+++ b/src/test/ui/rfc-2632-const-trait-impl/issue-100222.rs
@@ -0,0 +1,29 @@
+// revisions: nn ny yn yy
+// check-pass
+#![feature(const_trait_impl, associated_type_defaults, const_mut_refs)]
+
+#[cfg_attr(any(yn, yy), const_trait)]
+pub trait Index {
+    type Output;
+}
+
+#[cfg_attr(any(ny, yy), const_trait)]
+pub trait IndexMut where Self: Index {
+    const C: <Self as Index>::Output;
+    type Assoc = <Self as Index>::Output;
+    fn foo(&mut self, x: <Self as Index>::Output) -> <Self as Index>::Output;
+}
+
+impl Index for () { type Output = (); }
+
+impl const IndexMut for <() as Index>::Output {
+    const C: <Self as Index>::Output = ();
+    type Assoc = <Self as Index>::Output;
+    fn foo(&mut self, x: <Self as Index>::Output) -> <Self as Index>::Output
+        where <Self as Index>::Output:,
+    {}
+}
+
+const C: <() as Index>::Output = ();
+
+fn main() {}