src/test/ui/error-codes/E0225.stderr


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error[E0225]: only auto traits can be used as additional traits in a trait object
  --> $DIR/E0225.rs:12:32
   |
12 |     let _: Box<std::io::Read + std::io::Write>;
   |                                ^^^^^^^^^^^^^^ non-auto additional trait

error: aborting due to previous error