1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/compile-fail-migration/trait-safety-trait-impl.rs b/src/test/ui/compile-fail-migration/trait-safety-trait-impl.rs
new file mode 100644
index 00000000000..e846b660c2a
--- /dev/null
+++ b/src/test/ui/compile-fail-migration/trait-safety-trait-impl.rs
@@ -0,0 +1,28 @@
+// Copyright 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 unsafe traits require unsafe impls and that inherent
+// impls cannot be unsafe.
+
+trait SafeTrait {
+    fn foo(&self) { }
+}
+
+unsafe trait UnsafeTrait {
+    fn foo(&self) { }
+}
+
+unsafe impl UnsafeTrait for u8 { } // OK
+
+impl UnsafeTrait for u16 { } //~ ERROR requires an `unsafe impl` declaration
+
+unsafe impl SafeTrait for u32 { } //~ ERROR the trait `SafeTrait` is not unsafe
+
+fn main() { }