Gem check errors after clean install

After a clean install of JRuby-1.7.15, I ran ‘gem check’. Unexpectedly,
there were quite a number of errors indicated (see attached). Is this
correct? If it is correct, then should it be correct? What, then, would
be the use of ‘check’?

Is there any way that I might fix them?

that are all the default gems (and some more). how did you install jruby
?

from the output it looks like missing files inside the cache directory
which we do not include with jruby. not sure about whether rubygems
handles
default gems correctly with the check command. just thinking.