merge revision(s) r46313: [Backport #9896]
* eval.c (rb_using_refinement): add write-barriers for cref->nd_refinements.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@46524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) r46313: [Backport #9896]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@46524 b2dd03c8-39d4-4d8f-98ff-823fe69b080e