src/share/classes/java/util/Objects.java

rev 9262 : 8033909: Objects.requireNonNull(T, Supplier) doesn't specify what happens if the passed supplier is null itself

*** 285,293 ****
       * @throws NullPointerException if {@code obj} is {@code null}
       * @since 1.8
       */
      public static <T> T requireNonNull(T obj, Supplier<String> messageSupplier) {
          if (obj == null)
!             throw new NullPointerException(messageSupplier.get());
          return obj;
      }
  }
--- 285,294 ----
       * @throws NullPointerException if {@code obj} is {@code null}
       * @since 1.8
       */
      public static <T> T requireNonNull(T obj, Supplier<String> messageSupplier) {
          if (obj == null)
!             throw new NullPointerException(messageSupplier == null ?
!                                            null : messageSupplier.get());
          return obj;
      }
  }