symbol.c: junk-base attrset
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47816 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
symbol.c: junk-base attrset
unless the stem is not an attrset name.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@47816 b2dd03c8-39d4-4d8f-98ff-823fe69b080e