1 files changed, 18 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-loan-blocks-mut-uniq.rs b/src/test/ui/borrowck/borrowck-loan-blocks-mut-uniq.rs
new file mode 100644
index 000000000..33d6af303
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-loan-blocks-mut-uniq.rs
@@ -0,0 +1,18 @@
+fn borrow<F>(v: &isize, f: F) where F: FnOnce(&isize) {
+    f(v);
+}
+
+
+
+fn box_imm() {
+    let mut v: Box<_> = Box::new(3);
+    borrow(&*v,
+           |w| { //~ ERROR cannot borrow `v` as mutable
+            v = Box::new(4);
+            assert_eq!(*v, 3);
+            assert_eq!(*w, 4);
+        })
+}
+
+fn main() {
+}