merge revision(s) r49964: [Backport ruby#10957]

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


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_1@50128 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

Author: nagachika

ChangeLog

@@ -1,3 +1,8 @@
+Tue Mar 31 00:18:12 2015  Nobuyoshi Nakada  <[email protected]>
+
+	* parse.y (primary): empty parentheses at cmdarg can be null.
+	  [ruby-core:68477] [Bug #10957]
+
 Mon Mar 30 23:30:57 2015  Nobuyoshi Nakada  <[email protected]>
 
 	* ext/io/console/console.c (console_dev): id_console is not a

parse.y

@@ -2046,7 +2046,7 @@ arg		: lhs '=' arg
 			value_expr($1);
 			value_expr($3);
 			$$ = NEW_DOT2($1, $3);
-			if (nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
+			if ($1 && nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
 			    nd_type($3) == NODE_LIT && FIXNUM_P($3->nd_lit)) {
 			    deferred_nodes = list_append(deferred_nodes, $$);
 			}
@@ -2060,7 +2060,7 @@ arg		: lhs '=' arg
 			value_expr($1);
 			value_expr($3);
 			$$ = NEW_DOT3($1, $3);
-			if (nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
+			if ($1 && nd_type($1) == NODE_LIT && FIXNUM_P($1->nd_lit) &&
 			    nd_type($3) == NODE_LIT && FIXNUM_P($3->nd_lit)) {
 			    deferred_nodes = list_append(deferred_nodes, $$);
 			}

test/ruby/test_syntax.rb

@@ -408,6 +408,12 @@ def test_error_message_encoding
     assert_syntax_error(code, /def n "\u{2208}"; end/, bug10114)
   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

version.h

@@ -1,10 +1,10 @@
 #define RUBY_VERSION "2.1.5"
-#define RUBY_RELEASE_DATE "2015-03-30"
-#define RUBY_PATCHLEVEL 323
+#define RUBY_RELEASE_DATE "2015-03-31"
+#define RUBY_PATCHLEVEL 324
 
 #define RUBY_RELEASE_YEAR 2015
 #define RUBY_RELEASE_MONTH 3
-#define RUBY_RELEASE_DAY 30
+#define RUBY_RELEASE_DAY 31
 
 #include "ruby/version.h"