1 error: implementation of `FnOnce` is not general enough
2 --> $DIR/issue-30906.rs:18:5
4 LL | test(Compose(f, |_| {}));
5 | ^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough
7 = note: `fn(&'2 str) -> T` must implement `FnOnce<(&'1 str,)>`, for any lifetime `'1`...
8 = note: ...but it actually implements `FnOnce<(&'2 str,)>`, for some specific lifetime `'2`
10 error: aborting due to previous error