--- old/src/java.base/share/classes/java/util/ArrayList.java	2018-09-28 08:01:33.956709135 -0700
+++ new/src/java.base/share/classes/java/util/ArrayList.java	2018-09-28 08:01:33.392709330 -0700
@@ -1729,7 +1729,6 @@
     @Override
     public void replaceAll(UnaryOperator<E> operator) {
         replaceAllRange(operator, 0, size);
-        modCount++;
     }
 
     private void replaceAllRange(UnaryOperator<E> operator, int i, int end) {