1 files changed, 46 insertions, 0 deletions
diff --git a/src/test/ui/coercion/coerce-overloaded-autoderef-fail.stderr b/src/test/ui/coercion/coerce-overloaded-autoderef-fail.stderr
new file mode 100644
index 000000000..d067c3b3a
--- /dev/null
+++ b/src/test/ui/coercion/coerce-overloaded-autoderef-fail.stderr
@@ -0,0 +1,46 @@
+error[E0499]: cannot borrow `*x` as mutable more than once at a time
+  --> $DIR/coerce-overloaded-autoderef-fail.rs:9:24
+   |
+LL |     let y = borrow_mut(x);
+   |                        - first mutable borrow occurs here
+LL |     let z = borrow_mut(x);
+   |                        ^ second mutable borrow occurs here
+LL |
+LL |     drop((y, z));
+   |           - first borrow later used here
+
+error[E0506]: cannot assign to `**x` because it is borrowed
+  --> $DIR/coerce-overloaded-autoderef-fail.rs:17:5
+   |
+LL |     let y = borrow(x);
+   |                    - borrow of `**x` occurs here
+LL |     let z = borrow(x);
+LL |     **x += 1;
+   |     ^^^^^^^^ assignment to borrowed `**x` occurs here
+LL |
+LL |     drop((y, z));
+   |           - borrow later used here
+
+error[E0499]: cannot borrow `*x` as mutable more than once at a time
+  --> $DIR/coerce-overloaded-autoderef-fail.rs:23:20
+   |
+LL |     borrow_mut2(x, x);
+   |     ----------- -  ^ second mutable borrow occurs here
+   |     |           |
+   |     |           first mutable borrow occurs here
+   |     first borrow later used by call
+
+error[E0502]: cannot borrow `*x` as mutable because it is also borrowed as immutable
+  --> $DIR/coerce-overloaded-autoderef-fail.rs:28:5
+   |
+LL |     borrow2(x, x);
+   |     -------^^^^-^
+   |     |          |
+   |     |          immutable borrow occurs here
+   |     mutable borrow occurs here
+   |     immutable borrow later used by call
+
+error: aborting due to 4 previous errors
+
+Some errors have detailed explanations: E0499, E0502, E0506.
+For more information about an error, try `rustc --explain E0499`.