You gave too few lifetime arguments. Example:
fn foo<'a: 'b, 'b: 'a>() {} fn main() { foo::<'static>(); // error: wrong number of lifetime arguments: // expected 2, found 1 }
Please check you give the right number of lifetime arguments. Example:
fn foo<'a: 'b, 'b: 'a>() {} fn main() { foo::<'static, 'static>(); }