LuceneTestCase Junit测试出现严重: Panic: RunListener hook shouldn't throw exceptions. java.lang.NullPointe

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类描述：

/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.solr;

import org.junit.Test;

public class MyTest extends SolrTestCaseJ4 {
@Test
public void my(){
System.out.println("自定义继承的测试类，为什么出错");
}
}

控制台打印

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/F:/software/workspace/lucene-solr/solr/core/lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/F:/software/workspace/lucene-solr/solr/solrj/test-lib/slf4j-log4j12-1.7.7.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]
Assertions mismatch: -ea was not specified but -Dtests.asserts=true
五月 18, 2016 11:23:55 上午 com.carrotsearch.randomizedtesting.RandomizedRunner runSuite
严重: Panic: RunListener hook shouldn't throw exceptions.
java.lang.NullPointerException
   at org.apache.lucene.util.RunListenerPrintReproduceInfo.printDebuggingInformation(RunListenerPrintReproduceInfo.java:131)
   at org.apache.lucene.util.RunListenerPrintReproduceInfo.testRunFinished(RunListenerPrintReproduceInfo.java:118)
   at com.carrotsearch.randomizedtesting.RandomizedRunner.runSuite(RandomizedRunner.java:706)
   at com.carrotsearch.randomizedtesting.RandomizedRunner.access$200(RandomizedRunner.java:140)
   at com.carrotsearch.randomizedtesting.RandomizedRunner$2.run(RandomizedRunner.java:591)