error[E0277]: the trait bound `Foo: Clone` is not satisfied --> $DIR/issue-71136.rs:5:5 | LL | #[derive(Clone)] | ----- in this derive macro expansion LL | struct FooHolster { LL | the_foos: Vec, | ^^^^^^^^^^^^^^^^^^ the trait `Clone` is not implemented for `Foo` | = note: required because of the requirements on the impl of `Clone` for `Vec` = note: this error originates in the derive macro `Clone` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider annotating `Foo` with `#[derive(Clone)]` | LL | #[derive(Clone)] | error: aborting due to previous error For more information about this error, try `rustc --explain E0277`.