| error[E0207]: the type parameter `T` is not constrained by the impl trait, self type, or predicates | |
| --> $DIR/issue-16562.rs:10:6 | |
| | | |
| LL | impl<T, M: MatrixShape> Collection for Col<M, usize> { | |
| | ^ unconstrained type parameter | |
| error: aborting due to previous error | |
| For more information about this error, try `rustc --explain E0207`. |