Make the `next` variable mutable to allow for ref mut in for patterns.

1 files changed, 15 insertions, 0 deletions

diff --git a/src/test/run-pass/for-loop-mut-ref-element.rs b/src/test/run-pass/for-loop-mut-ref-element.rs
new file mode 100644
index 00000000000..14ce23b0724
--- /dev/null
+++ b/src/test/run-pass/for-loop-mut-ref-element.rs
@@ -0,0 +1,15 @@
+// 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.
+
+// Tests that for loops can bind elements as mutable references
+
+fn main() {
+    for ref mut _a in std::iter::once(true) {}
+}
\ No newline at end of file