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bb511c3f10
Ruby ships with empty directories for default gems. If Ruby installations has unsafe world-writable permissions, we will complain when about to install a gem that happens to be also a default gem, because we'll start by removing the previous install folder and that's supposed to be insecure due to too loose permissions. However, if the folder is empty, we don't actually need to remove anything, so we can skip the whole thing, avoiding the errors. https://github.com/rubygems/rubygems/commit/2f3cd8ac4e