src/share/classes/java/util/AbstractSet.java

rev 7046 : 4802647: Throw required NPEs from removeAll()/retainAll()
Reviewed-by: mduigou, chegar, dholmes
Contributed-by: Brandon Passanisi <brandon.passanisi@oracle.com>

*** 164,173 ****
--- 164,174 ----
       *         or if the specified collection is null
       * @see #remove(Object)
       * @see #contains(Object)
       */
      public boolean removeAll(Collection<?> c) {
+         Objects.requireNonNull(c);
          boolean modified = false;
  
          if (size() > c.size()) {
              for (Iterator<?> i = c.iterator(); i.hasNext(); )
                  modified |= remove(i.next());