Bug #11634
Updated by Tom Clegg almost 8 years ago
If a system gem is used to satisfy a Gemfile dependency, Bundler tries to update the system gem cache:
<pre>
Updating files in vendor/cache
* rake-10.4.2.gem
Permission denied @ rb_sysopen - /usr/local/lib/ruby/gems/2.3.0/cache/rake-10.4.2.gem
</pre>