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error[E0225]: only auto traits can be used as additional traits in a trait object
--> $DIR/E0225.rs:6:36
|
LL | let _: Box<dyn std::io::Read + std::io::Write>;
| ------------- ^^^^^^^^^^^^^^
| | |
| | additional non-auto trait
| | trait alias used in trait object type (additional use)
| first non-auto trait
| trait alias used in trait object type (first use)
error[E0225]: only auto traits can be used as additional traits in a trait object
--> $DIR/E0225.rs:8:20
|
LL | trait Foo = std::io::Read + std::io::Write;
| ------------- -------------- additional non-auto trait
| |
| first non-auto trait
...
LL | let _: Box<dyn Foo>;
| ^^^
| |
| trait alias used in trait object type (additional use)
| trait alias used in trait object type (first use)
error: aborting due to 2 previous errors
For more information about this error, try `rustc --explain E0225`.
|
