1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/traits/new-solver/winnow-specializing-impls.rs b/tests/ui/traits/new-solver/winnow-specializing-impls.rs
new file mode 100644
index 00000000000..06f64de7403
--- /dev/null
+++ b/tests/ui/traits/new-solver/winnow-specializing-impls.rs
@@ -0,0 +1,22 @@
+// build-pass
+// compile-flags: -Ztrait-solver=next
+
+// Tests that the specializing impl `<() as Foo>` holds during codegen.
+
+#![feature(min_specialization)]
+
+trait Foo {
+    fn bar();
+}
+
+impl<T> Foo for T {
+    default fn bar() {}
+}
+
+impl Foo for () {
+    fn bar() {}
+}
+
+fn main() {
+    <() as Foo>::bar();
+}