1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/traits/safety-ok-cc.rs b/src/test/ui/traits/safety-ok-cc.rs
new file mode 100644
index 000000000..099ba80e5
--- /dev/null
+++ b/src/test/ui/traits/safety-ok-cc.rs
@@ -0,0 +1,24 @@
+// run-pass
+// aux-build:trait_safety_lib.rs
+
+// Simple smoke test that unsafe traits can be compiled across crates.
+
+
+extern crate trait_safety_lib as lib;
+
+use lib::Foo;
+
+struct Bar { x: isize }
+unsafe impl Foo for Bar {
+    fn foo(&self) -> isize { self.x }
+}
+
+fn take_foo<F:Foo>(f: &F) -> isize { f.foo() }
+
+fn main() {
+    let x: isize = 22;
+    assert_eq!(22, take_foo(&x));
+
+    let x: Bar = Bar { x: 23 };
+    assert_eq!(23, take_foo(&x));
+}