1 files changed, 18 insertions, 0 deletions
diff --git a/tests/ui/borrowck/borrowck-closures-unique-imm.rs b/tests/ui/borrowck/borrowck-closures-unique-imm.rs
new file mode 100644
index 000000000..0dd004769
--- /dev/null
+++ b/tests/ui/borrowck/borrowck-closures-unique-imm.rs
@@ -0,0 +1,18 @@
+struct Foo {
+    x: isize,
+}
+
+pub fn main() {
+    let mut this = &mut Foo {
+        x: 1,
+    };
+    let mut r = || {
+        let p = &this.x;
+        &mut this.x; //~ ERROR cannot borrow
+        p.use_ref();
+    };
+    r()
+}
+
+trait Fake { fn use_mut(&mut self) { } fn use_ref(&self) { }  }
+impl<T> Fake for T { }