error[E0383]: partial reinitialization of uninitialized structure `t`
  --> $DIR/borrowck-partial-reinit-1.rs:27:5
   |
LL |     t.b = Some(u);
   |     ^^^^^^^^^^^^^

error[E0383]: partial reinitialization of uninitialized structure `t`
  --> $DIR/borrowck-partial-reinit-1.rs:33:5
   |
LL |     t.0 = Some(u);
   |     ^^^^^^^^^^^^^

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0383`.