--- a/jdk/src/share/classes/java/math/BigInteger.java	Thu Dec 05 18:04:12 2013 +0400
+++ b/jdk/src/share/classes/java/math/BigInteger.java	Thu Dec 05 07:44:59 2013 -0800
@@ -1815,7 +1815,7 @@
         int len = mag.length;
 
         if (len <= n) {
-            return this;
+            return abs();
         }
 
         int lowerInts[] = new int[n];