merge revision(s) 52461: [Backport #11663]
* parse.y (kwd_append): fix segv after invalid keyword argument, preceding keyword list is NULL when syntax error is there. [ruby-core:71356] [Bug #11663]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52742 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 52461: [Backport #11663]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_2@52742 b2dd03c8-39d4-4d8f-98ff-823fe69b080e