1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/consts/const_let_assign3.rs b/tests/ui/consts/const_let_assign3.rs
new file mode 100644
index 00000000000..1f68de8eed0
--- /dev/null
+++ b/tests/ui/consts/const_let_assign3.rs
@@ -0,0 +1,27 @@
+struct S {
+    state: u32,
+}
+
+impl S {
+    const fn foo(&mut self, x: u32) {
+        //~^ ERROR mutable reference
+        self.state = x;
+    }
+}
+
+const FOO: S = {
+    let mut s = S { state: 42 };
+    s.foo(3); //~ ERROR mutable reference
+    s
+};
+
+type Array = [u32; {
+    let mut x = 2;
+    let y = &mut x; //~ ERROR mutable reference
+    *y = 42;
+    *y
+}];
+
+fn main() {
+    assert_eq!(FOO.state, 3);
+}