1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/ui/borrowck/borrowck-consume-upcast-box.rs b/src/test/ui/borrowck/borrowck-consume-upcast-box.rs
new file mode 100644
index 000000000..6b32d185b
--- /dev/null
+++ b/src/test/ui/borrowck/borrowck-consume-upcast-box.rs
@@ -0,0 +1,14 @@
+// Check that we report an error if an upcast box is moved twice.
+
+trait Foo { fn dummy(&self); }
+
+fn consume(_: Box<dyn Foo>) {
+}
+
+fn foo(b: Box<dyn Foo + Send>) {
+    consume(b);
+    consume(b); //~ ERROR use of moved value
+}
+
+fn main() {
+}