cargo package doesn't catch errors with invalid keywords

[daboross]

If you create a package with a keyword specified with multiple words, cargo package works fine but cargo publish errors with:

api errors: invalid upload request: ApplicationError("invalid keyword specified: key word")

I think that cargo package should probably try to catch this error.

[alexcrichton]

Thanks for the report! There will inevitably be errors that cargo publish will report that cargo package cannot (e.g. a duplicate package on crates.io), so the charter of cargo package isn't so much to guarantee that cargo publish will succeed so much as just making sure the packing step itself succeeds. As a result I don't believe that this is a bug, so closing.