1 files changed, 8 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-3290.rs b/tests/ui/issues/issue-3290.rs
new file mode 100644
index 000000000..7014d517f
--- /dev/null
+++ b/tests/ui/issues/issue-3290.rs
@@ -0,0 +1,8 @@
+// run-pass
+#![allow(dead_code)]
+
+pub fn main() {
+   let mut x: Box<_> = Box::new(3);
+   x = x;
+   assert_eq!(*x, 3);
+}