1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/unsafe-trait-impl.rs b/src/test/ui/compile-fail-migration/unsafe-trait-impl.rs
new file mode 100644
index 00000000000..fb4652affd0
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/unsafe-trait-impl.rs
@@ -0,0 +1,24 @@
+// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+// Check that safe fns are not a subtype of unsafe fns.
+
+trait Foo {
+    unsafe fn len(&self) -> u32;
+}
+
+impl Foo for u32 {
+    fn len(&self) -> u32 { *self }
+    //~^ ERROR method `len` has an incompatible type for trait
+    //~| expected type `unsafe fn(&u32) -> u32`
+    //~| found type `fn(&u32) -> u32`
+}
+
+fn main() { }