ices/41073.rs: fixed with errors

=== stdout ===
=== stderr ===
error[E0740]: unions may not contain fields that need dropping
 --> /home/runner/work/glacier/glacier/ices/41073.rs:4:5
  |
4 |     a: A,
  |     ^^^^
  |
note: `std::mem::ManuallyDrop` can be used to wrap the type
 --> /home/runner/work/glacier/glacier/ices/41073.rs:4:5
  |
4 |     a: A,
  |     ^^^^

error: aborting due to previous error

For more information about this error, try `rustc --explain E0740`.
==============

Author: rustbot