1 files changed, 22 insertions, 0 deletions
diff --git a/src/test/ui/binding/func-arg-incomplete-pattern.rs b/src/test/ui/binding/func-arg-incomplete-pattern.rs
new file mode 100644
index 000000000..eb94ee48f
--- /dev/null
+++ b/src/test/ui/binding/func-arg-incomplete-pattern.rs
@@ -0,0 +1,22 @@
+// run-pass
+#![allow(dead_code)]
+// Test that we do not leak when the arg pattern must drop part of the
+// argument (in this case, the `y` field).
+
+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::new(1);
+    let objptr: *const usize = &*obj;
+    let f = Foo { x: obj, y: Box::new(2) };
+    let xptr = foo(f);
+    assert_eq!(objptr, xptr);
+}