1 files changed, 50 insertions, 0 deletions
diff --git a/src/test/ui/did_you_mean/issue-39544.rs b/src/test/ui/did_you_mean/issue-39544.rs
new file mode 100644
index 000000000..a19d3f704
--- /dev/null
+++ b/src/test/ui/did_you_mean/issue-39544.rs
@@ -0,0 +1,50 @@
+pub enum X {
+    Y
+}
+
+pub struct Z {
+    x: X
+}
+
+fn main() {
+    let z = Z { x: X::Y };
+    let _ = &mut z.x; //~ ERROR cannot borrow
+}
+
+impl Z {
+    fn foo<'z>(&'z self) {
+        let _ = &mut self.x; //~ ERROR cannot borrow
+    }
+
+    fn foo1(&self, other: &Z) {
+        let _ = &mut self.x; //~ ERROR cannot borrow
+        let _ = &mut other.x; //~ ERROR cannot borrow
+    }
+
+    fn foo2<'a>(&'a self, other: &Z) {
+        let _ = &mut self.x; //~ ERROR cannot borrow
+        let _ = &mut other.x; //~ ERROR cannot borrow
+    }
+
+    fn foo3<'a>(self: &'a Self, other: &Z) {
+        let _ = &mut self.x; //~ ERROR cannot borrow
+        let _ = &mut other.x; //~ ERROR cannot borrow
+    }
+
+    fn foo4(other: &Z) {
+        let _ = &mut other.x; //~ ERROR cannot borrow
+    }
+
+}
+
+pub fn with_arg(z: Z, w: &Z) {
+    let _ = &mut z.x; //~ ERROR cannot borrow
+    let _ = &mut w.x; //~ ERROR cannot borrow
+}
+
+pub fn with_tuple() {
+    let mut y = 0;
+    let x = (&y,);
+    *x.0 = 1;
+    //~^ ERROR cannot assign to `*x.0`, which is behind a `&` reference
+}