1 files changed, 11 insertions, 0 deletions
diff --git a/tests/ui/traits/negative-impls/negative-default-impls.rs b/tests/ui/traits/negative-impls/negative-default-impls.rs
new file mode 100644
index 00000000000..c68bca432fa
--- /dev/null
+++ b/tests/ui/traits/negative-impls/negative-default-impls.rs
@@ -0,0 +1,11 @@
+#![feature(negative_impls)]
+#![feature(specialization)]
+//~^ WARN the feature `specialization` is incomplete
+
+trait MyTrait {
+    type Foo;
+}
+
+default impl !MyTrait for u32 {} //~ ERROR negative impls cannot be default impls
+
+fn main() {}