How to use slices in get_stabbied?

[xxshady]

I tried to use stabby::slice::Slice to write the same:

stabby/examples/libloading/src/main.rs

Line 38 in 20d9837

.get_canaried::<extern "C" fn(&[u8])>(b"unstable_fn")

But it failed to compile

error: implementation of `IStable` is not general enough
   --> src/main.rs:165:65
    |
165 |         let exit_fn: extern "C" fn(stabby::slice::Slice<u8>) = *llib.get_stabbied(b"exit").unwrap();
    |                                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^ implementation of `IStable` is not general enough
    |
    = note: `IStable` would have to be implemented for the type `for<'a> extern "C" fn(Slice<'a, u8>)`
    = note: ...but `IStable` is actually implemented for the type `extern "C" fn(Slice<'0, u8>)`, for some specific lifetime `'0`

[xxshady]

extern "C" fn(data: *const u8, len: usize) compiles fine, so I guess it is the current workaround