svn commit: r1352609 - /lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/util/MathUtil.java

[us...@apache.org]

Author: uschindler
Date: Thu Jun 21 16:48:03 2012
New Revision: 1352609

URL: http://svn.apache.org/viewvc?rev=1352609&view=rev
Log:
LUCENE-4162: Fix infinite loop on wrong argument in MathUtil.log

Modified:
    lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/util/MathUtil.java

Modified: lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/util/MathUtil.java
URL: http://svn.apache.org/viewvc/lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/util/MathUtil.java?rev=1352609&r1=1352608&r2=1352609&view=diff
==============================================================================
--- lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/util/MathUtil.java (original)
+++ lucene/dev/trunk/lucene/core/src/java/org/apache/lucene/util/MathUtil.java Thu Jun 21 16:48:03 2012
@@ -27,9 +27,14 @@ public final class MathUtil {
   private MathUtil() {
   }
 
-  /** returns x == 0 ? 0 : Math.floor(Math.log(x) / Math.log(base)) */
+  /**
+   * Returns {@code x <= 0 ? 0 : Math.floor(Math.log(x) / Math.log(base))}
+   * @param base must be {@code > 1}
+   */
   public static int log(long x, int base) {
-    assert base > 1;
+    if (base <= 1) {
+      throw new IllegalArgumentException("base must be > 1");
+    }
     int ret = 0;
     while (x >= base) {
       x /= base;