1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/mut/mut-cross-borrowing.stderr b/src/test/ui/mut/mut-cross-borrowing.stderr
new file mode 100644
index 000000000..ee739d628
--- /dev/null
+++ b/src/test/ui/mut/mut-cross-borrowing.stderr
@@ -0,0 +1,21 @@
+error[E0308]: mismatched types
+  --> $DIR/mut-cross-borrowing.rs:7:7
+   |
+LL |     f(x)
+   |     - ^
+   |     | |
+   |     | expected `&mut isize`, found struct `Box`
+   |     | help: consider mutably borrowing here: `&mut x`
+   |     arguments to this function are incorrect
+   |
+   = note: expected mutable reference `&mut isize`
+                         found struct `Box<{integer}>`
+note: function defined here
+  --> $DIR/mut-cross-borrowing.rs:1:4
+   |
+LL | fn f(_: &mut isize) {}
+   |    ^ -------------
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0308`.