1 files changed, 20 insertions, 0 deletions

diff --git a/tests/ui/issues/issue-40288.rs b/tests/ui/issues/issue-40288.rs
new file mode 100644
index 000000000..60204c117
--- /dev/null
+++ b/tests/ui/issues/issue-40288.rs
@@ -0,0 +1,20 @@
+fn save_ref<'a>(refr: &'a i32, to: &mut [&'a i32]) {
+    for val in &mut *to {
+        *val = refr;
+    }
+}
+
+fn main() {
+    let ref init = 0i32;
+    let ref mut refr = 1i32;
+
+    let mut out = [init];
+
+    save_ref(&*refr, &mut out);
+
+    // This shouldn't be allowed as `refr` is borrowed
+    *refr = 3; //~ ERROR cannot assign to `*refr` because it is borrowed
+
+    // Prints 3?!
+    println!("{:?}", out[0]);
+}