dcapwell commented on code in PR #264:
URL: https://github.com/apache/cassandra-accord/pull/264#discussion_r2632692763


##########
accord-core/src/main/java/accord/utils/SmallBitSet.java:
##########
@@ -40,29 +40,50 @@ public long bits()
         return bits;
     }
 
+    private static long bitSafe(int i)
+    {
+        validateIndex(i);
+        return bit(i);
+    }
+
+    private static void validateIndex(int i)
+    {
+        if (i >= 64 || i < 0)
+            throw new IndexOutOfBoundsException("Unable to access bit " + i + 
"; must be between 0 and 63");
+    }
+
+    @Override
     public boolean set(int i)
     {
-        long bit = bit(i);
+        long bit = bitSafe(i);
         boolean result = 0 == (bits & bit);
         bits |= bit;
         return result;
     }
 
     @Override
-    public void setRange(int from, int to)
+    public void setRange(int fromInclusive, int toExclusive)
     {
-        bits |= ~(-1L << to) & (-1L << from);
+        validateIndex(fromInclusive);
+        Invariants.requireArgument(fromInclusive <= toExclusive, "from > to 
(%s > %s)", fromInclusive, toExclusive);
+        if (fromInclusive == toExclusive)

Review Comment:
   not safe it seems
   
   ```
                40: Clear
                41: setRange(0, 0)
   ```
   
   ```
   Expected :0
   Actual   :64
   ```



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