1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/specialization/defaultimpl/validation.rs b/tests/ui/specialization/defaultimpl/validation.rs
new file mode 100644
index 000000000..8558a1efb
--- /dev/null
+++ b/tests/ui/specialization/defaultimpl/validation.rs
@@ -0,0 +1,16 @@
+#![feature(negative_impls)]
+#![feature(specialization)] //~ WARN the feature `specialization` is incomplete
+
+struct S;
+struct Z;
+
+default impl S {} //~ ERROR inherent impls cannot be `default`
+
+default unsafe impl Send for S {} //~ ERROR impls of auto traits cannot be default
+default impl !Send for Z {} //~ ERROR impls of auto traits cannot be default
+                            //~^ ERROR negative impls cannot be default impls
+
+trait Tr {}
+default impl !Tr for S {} //~ ERROR negative impls cannot be default impls
+
+fn main() {}