1 files changed, 32 insertions, 0 deletions
diff --git a/src/test/ui/run-pass/binding/func-arg-incomplete-pattern.rs b/src/test/ui/run-pass/binding/func-arg-incomplete-pattern.rs
new file mode 100644
index 00000000000..7d9501879d0
--- /dev/null
+++ b/src/test/ui/run-pass/binding/func-arg-incomplete-pattern.rs
@@ -0,0 +1,32 @@
+// 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.
+
+// Test that we do not leak when the arg pattern must drop part of the
+// argument (in this case, the `y` field).
+
+#![feature(box_syntax)]
+
+struct Foo {
+    x: Box<usize>,
+    y: Box<usize>,
+}
+
+fn foo(Foo {x, ..}: Foo) -> *const usize {
+    let addr: *const usize = &*x;
+    addr
+}
+
+pub fn main() {
+    let obj: Box<_> = box 1;
+    let objptr: *const usize = &*obj;
+    let f = Foo {x: obj, y: box 2};
+    let xptr = foo(f);
+    assert_eq!(objptr, xptr);
+}