1 error: `impl` item signature doesn't match `trait` item signature
2 --> $DIR/signature-mismatch.rs:15:5
4 LL | fn async_fn(&self, buff: &[u8]) -> impl Future<Output = Vec<u8>>;
5 | ----------------------------------------------------------------- expected `fn(&'1 Struct, &'2 [u8]) -> impl Future<Output = Vec<u8>> + 'static`
7 LL | fn async_fn<'a>(&self, buff: &'a [u8]) -> impl Future<Output = Vec<u8>> + 'a {
8 | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ found `fn(&'1 Struct, &'2 [u8]) -> impl Future<Output = Vec<u8>> + '2`
10 = note: expected signature `fn(&'1 Struct, &'2 [u8]) -> impl Future<Output = Vec<u8>> + 'static`
11 found signature `fn(&'1 Struct, &'2 [u8]) -> impl Future<Output = Vec<u8>> + '2`
12 = help: the lifetime requirements from the `impl` do not correspond to the requirements in the `trait`
13 = help: verify the lifetime relationships in the `trait` and `impl` between the `self` argument, the other inputs and its output
15 error: aborting due to previous error