1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/span/borrowck-object-mutability.rs b/src/test/ui/span/borrowck-object-mutability.rs
new file mode 100644
index 000000000..f5adc2cc1
--- /dev/null
+++ b/src/test/ui/span/borrowck-object-mutability.rs
@@ -0,0 +1,26 @@
+trait Foo {
+    fn borrowed(&self);
+    fn borrowed_mut(&mut self);
+}
+
+fn borrowed_receiver(x: &dyn Foo) {
+    x.borrowed();
+    x.borrowed_mut(); //~ ERROR cannot borrow
+}
+
+fn borrowed_mut_receiver(x: &mut dyn Foo) {
+    x.borrowed();
+    x.borrowed_mut();
+}
+
+fn owned_receiver(x: Box<dyn Foo>) {
+    x.borrowed();
+    x.borrowed_mut(); //~ ERROR cannot borrow
+}
+
+fn mut_owned_receiver(mut x: Box<dyn Foo>) {
+    x.borrowed();
+    x.borrowed_mut();
+}
+
+fn main() {}