1 error[E0405]: cannot find trait `T` in this scope
2 --> $DIR/issue-21221-4.rs:10:6
5 | ^ not found in this scope
7 help: consider importing this trait
9 LL | use issue_21221_4::T;
12 error: aborting due to previous error
14 For more information about this error, try `rustc --explain E0405`.