error[E0382]: assign of moved value: `x.0`
  --> $DIR/borrowck-partial-reinit-3.rs:11:5
   |
LL |     mem::drop(x.0);
   |               --- value moved here
LL |     x.0.f = 3;
   |     ^^^^^^^^^ value assigned here after move
   |
   = note: move occurs because `x.0` has type `Test`, which does not implement the `Copy` trait

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0382`.