error[E0381]: assign to part of possibly uninitialized variable: `t`
  --> $DIR/issue-54499-field-mutation-of-never-init.rs:22:9
   |
LL |         t.0 = S(1);
   |         ^^^^^^^^^^ use of possibly uninitialized `t`

error[E0381]: assign to part of possibly uninitialized variable: `u`
  --> $DIR/issue-54499-field-mutation-of-never-init.rs:34:9
   |
LL |         u.0 = S(1);
   |         ^^^^^^^^^^ use of possibly uninitialized `u`

error[E0381]: assign to part of possibly uninitialized variable: `v`
  --> $DIR/issue-54499-field-mutation-of-never-init.rs:46:9
   |
LL |         v.x = S(1);
   |         ^^^^^^^^^^ use of possibly uninitialized `v`

error: aborting due to 3 previous errors

For more information about this error, try `rustc --explain E0381`.