### Question:
IteratorImpl { protected void runTheRestClosureWithError() { for (long i = Math.max(this.currentIndex, this.firstClosureIndex); i <= this.committedIndex; i++) { final Closure done = this.closures.get((int) (i - this.firstClosureIndex)); if (done != null) { Requires.requireNonNull(this.error, "error"); Requires.requireNonNull(this.error.getStatus(), "error.status"); final Status status = this.error.getStatus(); Utils.runClosureInThread(done, status); } } } IteratorImpl(final StateMachine fsm, final LogManager logManager, final List<Closure> closures,
                        final long firstClosureIndex, final long lastAppliedIndex, final long committedIndex,
                        final AtomicLong applyingIndex); @Override String toString(); LogEntry entry(); RaftException getError(); boolean isGood(); boolean hasError(); void next(); long getIndex(); Closure done(); void setErrorAndRollback(final long ntail, final Status st);  }### Answer:
@Test public void testRunTheRestClosureWithError() throws Exception { testSetErrorAndRollback(); for (final Closure closure : this.closures) { final MockClosure mc = (MockClosure) closure; assertNull(mc.s); } this.iter.runTheRestClosureWithError(); Thread.sleep(500); int i = 0; for (final Closure closure : this.closures) { i++; final MockClosure mc = (MockClosure) closure; if (i < 7) { assertNull(mc.s); } else { final Status s = mc.s; Assert.assertEquals(RaftError.ESTATEMACHINE.getNumber(), s.getCode()); assertEquals( "StateMachine meet critical error when applying one or more tasks since index=6, Status[UNKNOWN<-1>: test]", s.getErrorMsg()); } } }