[ruby-cvs:66998] nagachika:r59820 (ruby_2_4): merge revision(s) 59644: [Backport #13836]

[nagachika at ruby-lang.org]

nagachika	2017-09-10 19:27:59 +0900 (Sun, 10 Sep 2017)

  New Revision: 59820

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=59820

  Log:
    merge revision(s) 59644: [Backport #13836]
    
    parse.y: primary should not be 0
    
    * parse.y (primary): should not be 0, since it can be a receiver.
      [ruby-core:82447] [Bug #13836]

  Modified directories:
    branches/ruby_2_4/
  Modified files:
    branches/ruby_2_4/parse.y
    branches/ruby_2_4/test/ruby/test_defined.rb
    branches/ruby_2_4/version.h