Crate license is incorrectly shown for previous versions

[limeburst]

How to reproduce this issue:

1. Release a version of a crate with any license.
2. Release a new version with a new license.
3. Clicking on the old version does not update the page to show the old license.

[Turbo87]

I don't think that "ui" is the right label. https://github.com/rust-lang/crates.io/blob/master/src/krate.rs#L52 shows that the backend is providing the license information only per crate, not per version. Once the information is available on the backend it should be an easy change on the frontend

[alexcrichton]

Oh, right! I forgot about that as an implementation detail. Yeah currently we don't track license-per-version but rather license-per-crate, so that'd explain the behavior here!

[est31]

Why was this closed? This is an oversight and should be fixed.

[carols10cents]

@est31

Why was this closed? This is an oversight and should be fixed.

This was closed because it's a bug report, but the system is behaving as designed. Feel free to open a new issue proposing that the way we track licenses be changed to per-version rather than per-crate for discussion.

[est31]

@carols10cents opened: #736