2 files changed, 12 insertions, 0 deletions
diff --git a/ChangeLog b/ChangeLog
index 97b5744a37..556107d003 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+Thu Jun 26 00:48:31 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
+
+	* parse.y (primary): not operand might be empty.  [ruby-dev:35227]
+
 Wed Jun 25 21:54:34 2008  Yukihiro Matsumoto  <matz@ruby-lang.org>
 
 	* parse.y (primary): make functional-style not operator to act
diff --git a/parse.y b/parse.y
index 2d82b7b61c..bfc8cd9823 100644
--- a/parse.y
+++ b/parse.y
@@ -2621,6 +2621,14 @@ primary		: literal
 			$$ = dispatch2(unary, ripper_intern("not"), $3);
 		    %*/
 		    }
+		| keyword_not '(' rparen
+		    {
+		    /*%%%*/
+			$$ = NEW_LIT(Qtrue);
+		    /*%
+			$$ = dispatch2(unary, ripper_intern("not"), Qnil);
+		    %*/
+		    }
 		| operation brace_block
 		    {
 		    /*%%%*/