Disallow also CR in here-doc identifier

* parse.y (heredoc_identifier): CR in here-document identifier
  might or might not result in a syntax error, by the EOL code.
  make a syntax error regardless of the EOL code.

1 files changed, 6 insertions, 0 deletions

diff --git a/test/ruby/test_syntax.rb b/test/ruby/test_syntax.rb
index 66adeb1c09..771764720b 100644
--- a/test/ruby/test_syntax.rb
+++ b/test/ruby/test_syntax.rb
@@ -857,6 +857,12 @@ eom
     assert_syntax_error("<<\"EOS\n\"\nEOS\n", /unterminated/)
   end
 
+  def test_unterminated_heredoc_cr
+    %W[\r\n \n].each do |nl|
+      assert_syntax_error("<<\"\r\"#{nl}\r#{nl}", /unterminated/, nil, "CR with #{nl.inspect}")
+    end
+  end
+
   def test__END___cr
     assert_syntax_error("__END__\r<<<<<\n", /unexpected <</)
   end