How to jump to last version where docs built successfully?

[Boscop]

A lot of crates' docs don't build successfully but there are earlier versions that bbuilt successfully.
E.g.:
[failed] https://docs.rs/actix-web/0.7.2/actix_web/
[works] https://docs.rs/actix-web/0.6.4/actix_web/ (but is it the latest working version of docs? you'd have to click through the versions to find out)

[failed] https://docs.rs/yew/0.4.0/yew/
[works] https://docs.rs/yew/0.2.0/yew/

I don't see a way to jump to the latest working docs. There should be a button at the top, when the docs failed to build.

[NPN]

What should be done about the "Go to latest version" button then? Something like it should still display to let the user know that this is not the latest version, even if the latest version's docs are broken.

Maybe a general warning that this is not the latest version, but the latest version that has working docs?

[Boscop]

The "Go to latest version" could still go to the docs of the most recent version, even if they failed to build.
There, it will show the button to "jump to latest version whose docs built successfully".
That way, the user will be aware (when they arrived at the latest working docs) that that version is not the latest crate version.

[jyn514]

This was added in #543 :) You can see it in action on e.g. https://docs.rs/crate/actix-web/0.7.2.