nobu	2015-03-14 02:14:53 +0900 (Sat, 14 Mar 2015)

  New Revision: 49964

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=49964

  Log:
    parse.y: empty paren
    
    * parse.y (primary): empty parentheses at cmdarg can be null.
      [ruby-core:68477] [Bug #10957]

  Modified files:
    trunk/ChangeLog
    trunk/parse.y
    trunk/test/ruby/test_syntax.rb
Index: ChangeLog
===================================================================
--- ChangeLog	(revision 49963)
+++ ChangeLog	(revision 49964)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Sat Mar 14 02:14:50 2015  Nobuyoshi Nakada  <nobu@r...>
+
+	* parse.y (primary): empty parentheses at cmdarg can be null.
+	  [ruby-core:68477] [Bug #10957]
+
 Fri Mar 13 15:04:36 2015  Nobuyoshi Nakada  <nobu@r...>
 
 	* ext/stringio/stringio.c (strio_close): don't raise on dobule
Index: parse.y
===================================================================
--- parse.y	(revision 49963)
+++ parse.y	(revision 49964)
@@ -2102,7 +2102,7 @@ arg		: lhs '=' arg https://github.com/ruby/ruby/blob/trunk/parse.y#L2102
 			value_expr($1);
 			value_expr($3);
 			$$ = NEW_DOT2($1, $3);
-			if (nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
+			if ($1 && nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
 			    nd_type($3) == NODE_LIT && FIXNUM_P($3->nd_lit)) {
 			    deferred_nodes = list_append(deferred_nodes, $$);
 			}
@@ -2116,7 +2116,7 @@ arg		: lhs '=' arg https://github.com/ruby/ruby/blob/trunk/parse.y#L2116
 			value_expr($1);
 			value_expr($3);
 			$$ = NEW_DOT3($1, $3);
-			if (nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
+			if ($1 && nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
 			    nd_type($3) == NODE_LIT && FIXNUM_P($3->nd_lit)) {
 			    deferred_nodes = list_append(deferred_nodes, $$);
 			}
Index: test/ruby/test_syntax.rb
===================================================================
--- test/ruby/test_syntax.rb	(revision 49963)
+++ test/ruby/test_syntax.rb	(revision 49964)
@@ -557,6 +557,12 @@ eom https://github.com/ruby/ruby/blob/trunk/test/ruby/test_syntax.rb#L557
     assert_syntax_error(src, /formal argument/, bug10545)
   end
 
+  def test_null_range_cmdarg
+    bug10957 = '[ruby-core:68477] [Bug #10957]'
+    assert_ruby_status(['-c', '-e', 'p ()..0'], "", bug10957)
+    assert_ruby_status(['-c', '-e', 'p ()...0'], "", bug10957)
+  end
+
   private
 
   def not_label(x) @result = x; @not_label ||= nil end

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