1 error[E0740]: unions may not contain fields that need dropping
2 --> $DIR/union-custom-drop.rs:7:5
7 note: `std::mem::ManuallyDrop` can be used to wrap the type
8 --> $DIR/union-custom-drop.rs:7:5
13 error: aborting due to previous error
15 For more information about this error, try `rustc --explain E0740`.