git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22784 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* eval.c (thgroup_add): should return group for terminated thread case. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@4102 b2dd03c8-39d4-4d8f-98ff-823fe69b080e