1 files changed, 7 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-20174.rs b/tests/ui/issues/issue-20174.rs
new file mode 100644
index 00000000000..4ed5a97c172
--- /dev/null
+++ b/tests/ui/issues/issue-20174.rs
@@ -0,0 +1,7 @@
+// run-pass
+struct GradFn<F: Fn() -> usize>(F);
+
+fn main() {
+    let GradFn(x_squared) : GradFn<_> = GradFn(|| -> usize { 2 });
+    let _  = x_squared();
+}