(maybe readline does not exist). git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34395 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ignore non-string name modules. [ruby-core:42244][Bug #5938] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@34384 b2dd03c8-39d4-4d8f-98ff-823fe69b080e