1 error[E0308]: mismatched types
2 --> $DIR/rfc1623.rs:24:8
5 | ^^^ one type is more general than the other
7 = note: expected type `std::ops::FnOnce<(&'a Foo<'b>,)>`
8 found type `std::ops::FnOnce<(&Foo<'_>,)>`
10 error: aborting due to previous error
12 For more information about this error, try `rustc --explain E0308`.