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-rw-r--r--tests/ui/self/uniq-self-in-mut-slot.rs22
1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/self/uniq-self-in-mut-slot.rs b/tests/ui/self/uniq-self-in-mut-slot.rs
new file mode 100644
index 000000000..71e57d8c1
--- /dev/null
+++ b/tests/ui/self/uniq-self-in-mut-slot.rs
@@ -0,0 +1,22 @@
+// run-pass
+
+struct X {
+ a: isize
+}
+
+trait Changer {
+ fn change(self: Box<Self>) -> Box<Self>;
+}
+
+impl Changer for X {
+ fn change(mut self: Box<X>) -> Box<X> {
+ self.a = 55;
+ self
+ }
+}
+
+pub fn main() {
+ let x: Box<_> = Box::new(X { a: 32 });
+ let new_x = x.change();
+ assert_eq!(new_x.a, 55);
+}