1error: implementation of `FnOnce` is not general enough
2  --> $DIR/issue-30906.rs:18:5
3   |
4LL |     test(Compose(f, |_| {}));
5   |     ^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `FnOnce` is not general enough
6   |
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`
9
10error: aborting due to previous error
11
12