1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/traits/new-solver/projection-discr-kind.rs b/tests/ui/traits/new-solver/projection-discr-kind.rs
new file mode 100644
index 000000000..20296b287
--- /dev/null
+++ b/tests/ui/traits/new-solver/projection-discr-kind.rs
@@ -0,0 +1,18 @@
+// compile-flags: -Ztrait-solver=next
+
+// Check that `<T::Assoc as DiscriminantKind>::Discriminant` doesn't normalize
+// to itself and cause overflow/ambiguity.
+
+trait Foo {
+    type Assoc;
+}
+
+trait Bar {}
+fn needs_bar(_: impl Bar) {}
+
+fn foo<T: Foo>(x: T::Assoc) {
+    needs_bar(std::mem::discriminant(&x));
+    //~^ ERROR the trait bound `Discriminant<<T as Foo>::Assoc>: Bar` is not satisfied
+}
+
+fn main() {}