1 files changed, 11 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-11958.rs b/src/test/ui/issues/issue-11958.rs
new file mode 100644
index 000000000..a7af01e25
--- /dev/null
+++ b/src/test/ui/issues/issue-11958.rs
@@ -0,0 +1,11 @@
+// run-pass
+
+// We shouldn't need to rebind a moved upvar as mut if it's already
+// marked as mut
+
+pub fn main() {
+    let mut x = 1;
+    let _thunk = Box::new(move|| { x = 2; });
+    //~^ WARN value assigned to `x` is never read
+    //~| WARN unused variable: `x`
+}