merge revision(s) 49964,50265: [Backport #11047] [Backport #10957]
* parse.y (primary): empty parentheses at cmdarg can be null. [ruby-core:68477] [Bug #10957] * parse.y (arg): fix segfault by null caused by syntax error. [ruby-core:68851] [Bug #10957]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50277 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 49964,50265: [Backport #11047] [Backport #10957]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@50277 b2dd03c8-39d4-4d8f-98ff-823fe69b080e