src/share/classes/java/lang/Throwable.java

*** 1037,1047 ****
       * @throws NullPointerException if {@code exception} is {@code null}
       * @since 1.7
       */
      public final synchronized void addSuppressed(Throwable exception) {
          if (exception == this)
!             throw new IllegalArgumentException(SELF_SUPPRESSION_MESSAGE);
  
          if (exception == null)
              throw new NullPointerException(NULL_CAUSE_MESSAGE);
  
          if (suppressedExceptions == null) // Suppressed exceptions not recorded
--- 1037,1047 ----
       * @throws NullPointerException if {@code exception} is {@code null}
       * @since 1.7
       */
      public final synchronized void addSuppressed(Throwable exception) {
          if (exception == this)
!             throw new IllegalArgumentException(SELF_SUPPRESSION_MESSAGE, exception);
  
          if (exception == null)
              throw new NullPointerException(NULL_CAUSE_MESSAGE);
  
          if (suppressedExceptions == null) // Suppressed exceptions not recorded