1 files changed, 47 insertions, 0 deletions
diff --git a/tests/ui/span/borrowck-borrow-overloaded-deref-mut.stderr b/tests/ui/span/borrowck-borrow-overloaded-deref-mut.stderr
new file mode 100644
index 000000000..3fed7b3f4
--- /dev/null
+++ b/tests/ui/span/borrowck-borrow-overloaded-deref-mut.stderr
@@ -0,0 +1,47 @@
+error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+  --> $DIR/borrowck-borrow-overloaded-deref-mut.rs:29:25
+   |
+LL |     let __isize = &mut *x;
+   |                         ^ cannot borrow as mutable
+   |
+help: consider changing this to be mutable
+   |
+LL | fn deref_mut1(mut x: Own<isize>) {
+   |               +++
+
+error[E0596]: cannot borrow `*x` as mutable, as it is behind a `&` reference
+  --> $DIR/borrowck-borrow-overloaded-deref-mut.rs:41:11
+   |
+LL |     &mut **x
+   |           ^^ `x` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+   |
+help: consider changing this to be a mutable reference
+   |
+LL | fn deref_extend_mut1<'a>(x: &'a mut Own<isize>) -> &'a mut isize {
+   |                             ~~~~~~~~~~~~~~~~~~
+
+error[E0596]: cannot borrow `x` as mutable, as it is not declared as mutable
+  --> $DIR/borrowck-borrow-overloaded-deref-mut.rs:49:6
+   |
+LL |     *x = 3;
+   |      ^ cannot borrow as mutable
+   |
+help: consider changing this to be mutable
+   |
+LL | fn assign1<'a>(mut x: Own<isize>) {
+   |                +++
+
+error[E0596]: cannot borrow `*x` as mutable, as it is behind a `&` reference
+  --> $DIR/borrowck-borrow-overloaded-deref-mut.rs:53:6
+   |
+LL |     **x = 3;
+   |      ^^ `x` is a `&` reference, so the data it refers to cannot be borrowed as mutable
+   |
+help: consider changing this to be a mutable reference
+   |
+LL | fn assign2<'a>(x: &'a mut Own<isize>) {
+   |                   ~~~~~~~~~~~~~~~~~~
+
+error: aborting due to 4 previous errors
+
+For more information about this error, try `rustc --explain E0596`.