akr	2013-08-01 01:48:08 +0900 (Thu, 01 Aug 2013)

  New Revision: 42298

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=42298

  Log:
    * bignum.c (big2str_karatsuba): Fix a condition of power_level.

  Modified files:
    trunk/ChangeLog
    trunk/bignum.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 42297)
+++ ChangeLog	(revision 42298)
@@ -1,3 +1,7 @@ https://github.com/ruby/ruby/blob/trunk/ChangeLog#L1
+Thu Aug  1 01:45:18 2013  Tanaka Akira  <akr@f...>
+
+	* bignum.c (big2str_karatsuba): Fix a condition of power_level.
+
 Thu Aug  1 01:09:02 2013  Tanaka Akira  <akr@f...>
 
 	* bignum.c (LOG2_KARATSUBA_BIG2STR_DIGITS): Removed.
Index: bignum.c
===================================================================
--- bignum.c	(revision 42297)
+++ bignum.c	(revision 42298)
@@ -4225,6 +4225,8 @@ big2str_orig(struct big2str_struct *b2s, https://github.com/ruby/ruby/blob/trunk/bignum.c#L4225
     size_t j = len;
     BDIGIT* ds = BDIGITS(x);
 
+    assert(i <= 2);
+
     while (i && j > 0) {
 	long k = i;
 	BDIGIT_DBL num = 0;
@@ -4266,7 +4268,7 @@ big2str_karatsuba(struct big2str_struct https://github.com/ruby/ruby/blob/trunk/bignum.c#L4268
 	}
     }
 
-    if (power_level == 0) {
+    if (power_level < 0) {
 	return big2str_orig(b2s, x, ptr, len, trim);
     }
 

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