Grails和老版groovy存在冲突

几天前就svn下来了grails，ant编译后运行一直报错，以为是程序问题，结果down了个0.4版，问题是青山依旧在，于是放弃。结果magicgod同志那边报说一切正常。于是感觉很崩溃，因为google时候也没有个所以然。

当然，现在知道丫是跟老早就装上、很久没升级的groovy冲突了。这点应该也算是丫做的不够完善的地方。

错误信息如下：

C:\Documents and Settings\wjx>grails help

Welcome to Grails 0.5-SNAPSHOT - http://grails.org/
Licensed under Apache Standard License 2.0
Grails home is set to: E:\Grails\0.5

Base Directory: C:\Documents and Settings\wjx
Environment set to development
Note: No plugin scripts found
Running script E:\Grails\0.5\scripts\Help.groovy
Error executing script Help: Cannot invoke method addURL() on null object
java.lang.NullPointerException: Cannot invoke method addURL() on null object
       at org.codehaus.groovy.runtime.NullObject.invokeMethod(NullObject.java:102)
       at org.codehaus.groovy.runtime.Invoker.invokePogoMethod(Invoker.java:144)
       at org.codehaus.groovy.runtime.Invoker.invokeMethod(Invoker.java:121)
       at org.codehaus.groovy.runtime.InvokerHelper.invokeMethod(InvokerHelper.java:111)
       .....