1 error[E0382]: use of moved value: `u`
2 --> $DIR/borrowck-union-move-assign.rs:17:21
4 LL | let mut u = U { a: A };
5 | ----- move occurs because `u` has type `U`, which does not implement the `Copy` trait
9 | ^^^ value used here after move
11 error: aborting due to previous error
13 For more information about this error, try `rustc --explain E0382`.