coc-implementation doesn't work

[pronvis]

First of all, thanks for that plugin 👍
Now, I am wondering why coc-implementation saying Implementation not found for clone() method in next code:

let opt: Option<i32> = Some(22);
opt.clone();

coc-definition jumps to pub trait Clone, thats seems legit. But I want to jump to impl<T: Clone> Clone for Option<T>, how to do that and why coc-implementation can't find it?

Looks like bug.

[Qiming zhao]

Should be problem of your language server, checkout https://github.com/neoclide/coc.nvim/wiki/Debug-language-server#using-output-channel