Attrs for generic parameter with impl Trait

rust-analyzer version: latest master (but really anything recent)

rustc version: rustc 1.74.0 (79e9716c9 2023-11-13)

relevant settings: None

Rust-analyzer panics when fetching Attrs for functions that have parameter types specified with impl Trait syntax.

trait Foo {}
impl Foo for () {}
fn foo(x: impl Foo) {
    ()
}

In the example above the function is generic over type of x , but ra panics when I attempt to fetch Attrs for the generic parameter.
More info and workaround can be seen in https://github.com/rust-lang/rust-analyzer/pull/16092#discussion_r1457269627

The bug happens in https://github.com/rust-lang/rust-analyzer/blob/8f6a72871ec87ed53cfe43a09fb284168a284e7e/crates/hir-def/src/generics.rs#L562 with the function file_id_and_params_of returning empty generic_params_list for the example above

Start in crates/hir-def/src/generics.rs at file_id_and_params_of, using the minimal Foo and impl Trait example from the report to reproduce the panic when fetching Attrs for the generic parameter. Trace why generic_params_list is empty, then verify that fetching Attrs for the example no longer panics.