1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/nll/issue-61311-normalize.rs b/tests/ui/nll/issue-61311-normalize.rs
new file mode 100644
index 000000000..77d67b07a
--- /dev/null
+++ b/tests/ui/nll/issue-61311-normalize.rs
@@ -0,0 +1,34 @@
+// Regression test for #61311
+// We would ICE after failing to normalize `Self::Proj` in the `impl` below.
+
+// check-pass
+
+pub struct Unit;
+trait Obj {}
+
+trait Bound {}
+impl Bound for Unit {}
+
+pub trait HasProj {
+    type Proj;
+}
+
+impl<T> HasProj for T {
+    type Proj = Unit;
+}
+
+trait HasProjFn {
+    type Proj;
+    fn the_fn(_: Self::Proj);
+}
+
+impl HasProjFn for Unit
+where
+    Box<dyn Obj + 'static>: HasProj,
+    <Box<dyn Obj + 'static> as HasProj>::Proj: Bound,
+{
+    type Proj = Unit;
+    fn the_fn(_: Self::Proj) {}
+}
+
+fn main() {}