Ant 启动cassandra cli错误

当我尝试运行cassandra cli时，出现以下错误

manuzhang@manuzhang-U24E:~/git/cassandra-trunk$ bin/cassandra-cli -h localhost -p 9160
Column Family assumptions read from /home/manuzhang/.cassandra-cli/assumptions.json
Connected to: "Test Cluster" on localhost/9160
Welcome to Cassandra CLI version Unknown

Exception in thread "main" java.lang.AssertionError
    at org.apache.cassandra.cli.CliClient.loadHelp(CliClient.java:178)
    at org.apache.cassandra.cli.CliClient.getHelp(CliClient.java:171)
    at org.apache.cassandra.cli.CliClient.printBanner(CliClient.java:197)
    at org.apache.cassandra.cli.CliMain.main(CliMain.java:312)

这条线是：

final InputStream is = CliClient.class.getClassLoader().getResourceAsStream("org/apache/cassandra/cli/CliHelp.yaml");
assert is != null;

该文件实际上位于

$CASSANDRA_HOME/src/resources/org/apache/CASSANDRA/cli

中

---

我已经成功运行了好几次了

好，通过终端中的

ant build

解决

我想这是因为我从源代码开始构建，并不时修改一些代码

但仅仅添加几行注释并不能重现问题