1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/trait-impl-method-mismatch.rs b/src/test/ui/compile-fail-migration/trait-impl-method-mismatch.rs
new file mode 100644
index 00000000000..a05e007d6b7
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/trait-impl-method-mismatch.rs
@@ -0,0 +1,24 @@
+// Copyright 2012 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.
+
+
+trait Mumbo {
+    fn jumbo(&self, x: &usize) -> usize;
+}
+
+impl Mumbo for usize {
+    // Cannot have a larger effect than the trait:
+    unsafe fn jumbo(&self, x: &usize) { *self + *x; }
+    //~^ ERROR method `jumbo` has an incompatible type for trait
+    //~| expected type `fn
+    //~| found type `unsafe fn
+}
+
+fn main() {}