akr	2013-08-07 20:08:03 +0900 (Wed, 07 Aug 2013)

  New Revision: 42424

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=42424

  Log:
    * bignum.c (rb_big_odd_p): Check the bignum length.
      (rb_big_even_p): Ditto.

  Modified files:
    trunk/ChangeLog
    trunk/bignum.c
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Index: ChangeLog
===================================================================
--- ChangeLog	(revision 42423)
+++ ChangeLog	(revision 42424)
@@ -1,3 +1,8 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Wed Aug  7 20:05:38 2013  Tanaka Akira  <akr@f...>
+
+	* bignum.c (rb_big_odd_p): Check the bignum length.
+	  (rb_big_even_p): Ditto.
+
 Wed Aug  7 19:29:26 2013  Tanaka Akira  <akr@f...>
 
 	* bignum.c (dbl2big): A condition simplified.
Index: bignum.c
===================================================================
--- bignum.c	(revision 42423)
+++ bignum.c	(revision 42424)
@@ -6559,7 +6559,7 @@ rb_big_size(VALUE big) https://github.com/ruby/ruby/blob/trunk/bignum.c#L6559
 static VALUE
 rb_big_odd_p(VALUE num)
 {
-    if (BDIGITS(num)[0] & 1) {
+    if (RBIGNUM_LEN(num) != 0 && BDIGITS(num)[0] & 1) {
 	return Qtrue;
     }
     return Qfalse;
@@ -6575,7 +6575,7 @@ rb_big_odd_p(VALUE num) https://github.com/ruby/ruby/blob/trunk/bignum.c#L6575
 static VALUE
 rb_big_even_p(VALUE num)
 {
-    if (BDIGITS(num)[0] & 1) {
+    if (RBIGNUM_LEN(num) != 0 && BDIGITS(num)[0] & 1) {
 	return Qfalse;
     }
     return Qtrue;

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