diff --git a/src/test/ui/generator/issue-57478.rs b/src/test/ui/generator/issue-57478.rs
new file mode 100644
index 00000000000..592632cd351
--- /dev/null
+++ b/src/test/ui/generator/issue-57478.rs
@@ -0,0 +1,14 @@
+#![feature(negative_impls, generators)]
+
+struct Foo;
+impl !Send for Foo {}
+
+fn main() {
+    assert_send(|| {
+        let guard = Foo;
+        drop(guard);
+        yield;
+    })
+}
+
+fn assert_send<T: Send>(_: T) {}