error[E0178]: expected a path on the left-hand side of `+`
  --> $DIR/trait-object-bad-parens.rs:8:16
   |
LL |     let _: Box<((Auto)) + Auto>;
   |                ^^^^^^^^ expected a path

error[E0178]: expected a path on the left-hand side of `+`
  --> $DIR/trait-object-bad-parens.rs:9:16
   |
LL |     let _: Box<(Auto + Auto) + Auto>;
   |                ^^^^^^^^^^^^^ expected a path

error[E0178]: expected a path on the left-hand side of `+`
  --> $DIR/trait-object-bad-parens.rs:10:16
   |
LL |     let _: Box<(Auto +) + Auto>;
   |                ^^^^^^^^ expected a path

error[E0178]: expected a path on the left-hand side of `+`
  --> $DIR/trait-object-bad-parens.rs:11:16
   |
LL |     let _: Box<(dyn Auto) + Auto>;
   |                ^^^^^^^^^^ expected a path

error: aborting due to 4 previous errors

For more information about this error, try `rustc --explain E0178`.