1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/wf_check_closures.rs b/src/test/ui/type-alias-impl-trait/wf_check_closures.rs
new file mode 100644
index 000000000..2c70696ff
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/wf_check_closures.rs
@@ -0,0 +1,17 @@
+#![feature(type_alias_impl_trait)]
+
+trait Bar {
+    fn bar(&self);
+}
+
+type FooFn<B> = impl FnOnce();
+
+fn foo<B: Bar>(bar: B) -> FooFn<B> {
+    move || { bar.bar() }
+    //~^ ERROR the trait bound `B: Bar` is not satisfied
+}
+
+fn main() {
+    let boom: FooFn<u32> = unsafe { core::mem::zeroed() };
+    boom();
+}