1 files changed, 28 insertions, 0 deletions
diff --git a/src/test/ui/binding/func-arg-ref-pattern.rs b/src/test/ui/binding/func-arg-ref-pattern.rs
new file mode 100644
index 00000000000..ebb7a6afa9b
--- /dev/null
+++ b/src/test/ui/binding/func-arg-ref-pattern.rs
@@ -0,0 +1,28 @@
+// run-pass
+// exec-env:RUST_POISON_ON_FREE=1
+
+// Test argument patterns where we create refs to the inside of
+// boxes. Make sure that we don't free the box as we match the
+// pattern.
+
+#![feature(box_patterns)]
+#![feature(box_syntax)]
+
+fn getaddr(box ref x: Box<usize>) -> *const usize {
+    let addr: *const usize = &*x;
+    addr
+}
+
+fn checkval(box ref x: Box<usize>) -> usize {
+    *x
+}
+
+pub fn main() {
+    let obj: Box<_> = box 1;
+    let objptr: *const usize = &*obj;
+    let xptr = getaddr(obj);
+    assert_eq!(objptr, xptr);
+
+    let obj = box 22;
+    assert_eq!(checkval(obj), 22);
+}