1 files changed, 35 insertions, 0 deletions
diff --git a/src/libcoretest/raw.rs b/src/libcoretest/raw.rs
new file mode 100644
index 00000000000..f2c23c7c773
--- /dev/null
+++ b/src/libcoretest/raw.rs
@@ -0,0 +1,35 @@
+// 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.
+
+use core::raw::*;
+use core::mem;
+
+#[test]
+fn synthesize_closure() {
+    unsafe {
+        let x = 10;
+        let f: |int| -> int = |y| x + y;
+
+        assert_eq!(f(20), 30);
+
+        let original_closure: Closure = mem::transmute(f);
+
+        let actual_function_pointer = original_closure.code;
+        let environment = original_closure.env;
+
+        let new_closure = Closure {
+            code: actual_function_pointer,
+            env: environment
+        };
+
+        let new_f: |int| -> int = mem::transmute(new_closure);
+        assert_eq!(new_f(20), 30);
+    }
+}