1error[E0308]: mismatched types 2 --> $DIR/trait-bounds-cant-coerce.rs:13:7 3 | 4LL | a(x); 5 | ^ expected trait `Foo + Send`, found trait `Foo` 6 | 7 = note: expected struct `Box<(dyn Foo + Send + 'static)>` 8 found struct `Box<(dyn Foo + 'static)>` 9 10error: aborting due to previous error 11 12For more information about this error, try `rustc --explain E0308`. 13