1 files changed, 6 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-36400.rs b/src/test/ui/issues/issue-36400.rs
new file mode 100644
index 000000000..a405f9b11
--- /dev/null
+++ b/src/test/ui/issues/issue-36400.rs
@@ -0,0 +1,6 @@
+fn f(x: &mut u32) {}
+
+fn main() {
+    let x = Box::new(3);
+    f(&mut *x); //~ ERROR cannot borrow `*x` as mutable, as `x` is not declared as mutable
+}