src/share/classes/java/util/IdentityHashMap.java

rev 7932 : 8021591: Additional explicit null checks
Reviewed-by: psandoz, martin, alanb

@@ -995,10 +995,11 @@
          * Must revert from AbstractSet's impl to AbstractCollection's, as
          * the former contains an optimization that results in incorrect
          * behavior when c is a smaller "normal" (non-identity-based) Set.
          */
         public boolean removeAll(Collection<?> c) {
+            Objects.requireNonNull(c);
             boolean modified = false;
             for (Iterator<K> i = iterator(); i.hasNext(); ) {
                 if (c.contains(i.next())) {
                     i.remove();
                     modified = true;

@@ -1210,10 +1211,11 @@
          * Must revert from AbstractSet's impl to AbstractCollection's, as
          * the former contains an optimization that results in incorrect
          * behavior when c is a smaller "normal" (non-identity-based) Set.
          */
         public boolean removeAll(Collection<?> c) {
+            Objects.requireNonNull(c);
             boolean modified = false;
             for (Iterator<Map.Entry<K,V>> i = iterator(); i.hasNext(); ) {
                 if (c.contains(i.next())) {
                     i.remove();
                     modified = true;