git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@5297 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
<Masamichi.Akiyoshi@jp.compaq.com> is merged. * eval.c (exec_under): changing ruby_class is OK, but should not alter cbase. * eval.c (yield_under_i): ditto. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2258 b2dd03c8-39d4-4d8f-98ff-823fe69b080e