error[E0133]: access to union field is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:20:5
   |
LL |     foo.a += 5;
   |     ^^^^^^^^^^ access to union field
   |
   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior

error[E0133]: access to union field is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:21:5
   |
LL |     foo.b += Dropping;
   |     ^^^^^ access to union field
   |
   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior

error[E0133]: assignment to union field that might need dropping is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:22:5
   |
LL |     foo.b = Dropping;
   |     ^^^^^^^^^^^^^^^^ assignment to union field that might need dropping
   |
   = note: the previous content of the field will be dropped, which causes undefined behavior if the field was not properly initialized

error[E0133]: access to union field is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:23:5
   |
LL |     foo.a;
   |     ^^^^^ access to union field
   |
   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior

error[E0133]: access to union field is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:25:5
   |
LL |     foo.b;
   |     ^^^^^ access to union field
   |
   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior

error[E0133]: access to union field is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:27:13
   |
LL |     foo.b = foo.b;
   |             ^^^^^ access to union field
   |
   = note: the field may not be properly initialized: using uninitialized data will cause undefined behavior

error[E0133]: assignment to union field that might need dropping is unsafe and requires unsafe function or block
  --> $DIR/union-assignop.rs:27:5
   |
LL |     foo.b = foo.b;
   |     ^^^^^^^^^^^^^ assignment to union field that might need dropping
   |
   = note: the previous content of the field will be dropped, which causes undefined behavior if the field was not properly initialized

error: aborting due to 7 previous errors

For more information about this error, try `rustc --explain E0133`.