I have three independent groovy maven-based projects that all started to fail on the same day with the same error. Not really sure why this is happening, there is a build error with the ever-helpful message "null". I'm suspecting something is going on with the gmaven plugin since the projects all share that in common and that's where the exception is being thrown.  

If I mvn -e clean package, I get the following stack trace, which doesn't help me too much more. Does anyone have any ideas where to go with this?

[INFO] [compiler:testCompile]
[INFO] Compiling 7 source files to /Volumes/ext/depot/myProject/target/test-classes
[INFO] [groovy:testCompile {execution: default}]
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] null

[INFO] ------------------------------------------------------------------------
[INFO] Trace
org.apache.maven.lifecycle.LifecycleExecutionException
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals (DefaultLifecycleExecutor.java:564)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle (DefaultLifecycleExecutor.java:480)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal (DefaultLifecycleExecutor.java:459)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures (DefaultLifecycleExecutor.java:311)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments (DefaultLifecycleExecutor.java:278)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute (DefaultLifecycleExecutor.java:143)
    at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:333)
    at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:126)
    at org.apache.maven.cli.MavenCli.main (MavenCli.java:282)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:39)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:25)
    at java.lang.reflect.Method.invoke (Method.java:585)
    at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
    at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
    at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
    at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
Caused by: org.apache.maven.plugin.MojoExecutionException
    at org.codehaus.groovy.maven.plugin.MojoSupport.execute(MojoSupport.java:85)
    at org.apache.maven.plugin.DefaultPluginManager.executeMojo (DefaultPluginManager.java:447)
    at org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals (DefaultLifecycleExecutor.java:539)
    ... 16 more
Caused by: java.lang.reflect.MalformedParameterizedTypeException
    at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.validateConstructorArguments (ParameterizedTypeImpl.java:42)
    at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.<init>(ParameterizedTypeImpl.java:35)
    at sun.reflect.generics.reflectiveObjects.ParameterizedTypeImpl.make (ParameterizedTypeImpl.java:77)
    at sun.reflect.generics.factory.CoreReflectionFactory.makeParameterizedType (CoreReflectionFactory.java:86)
    at sun.reflect.generics.visitor.Reifier.visitClassTypeSignature (Reifier.java:122)
    at sun.reflect.generics.tree.ClassTypeSignature.accept (ClassTypeSignature.java:31)
    at sun.reflect.generics.repository.MethodRepository.getReturnType (MethodRepository.java:50)
    at java.lang.reflect.Method.getGenericReturnType (Method.java:231)
    at org.codehaus.groovy.vmplugin.v5.Java5.configureClassNode (Java5.java:161)
    at org.codehaus.groovy.ast.ClassNode.lazyClassInit (ClassNode.java:209)
    at org.codehaus.groovy.ast.ClassNode.getUnresolvedSuperClass (ClassNode.java:744)
    at org.codehaus.groovy.ast.ClassNode.getUnresolvedSuperClass (ClassNode.java:738)
    at org.codehaus.groovy.ast.ClassNode.getSuperClass (ClassNode.java:732)
    at org.codehaus.groovy.control.CompilationUnit.sortClasses (CompilationUnit.java:480)
    at org.codehaus.groovy.control.CompilationUnit.compile (CompilationUnit.java:453)
    at org.codehaus.groovy.control.CompilationUnit.compile (CompilationUnit.java:417)
    at org.codehaus.groovy.maven.runtime.v15.ClassCompilerFeature$ClassCompilerImpl.compile(ClassCompilerFeature.java:158)
    at org.codehaus.groovy.maven.plugin.compile.AbstractCompileMojo.compile(AbstractCompileMojo.java:200)
    at org.codehaus.groovy.maven.plugin.compile.AbstractCompileMojo.process(AbstractCompileMojo.java:164)
    at org.codehaus.groovy.maven.plugin.ComponentMojoSupport.doExecute(ComponentMojoSupport.java:68)
    at org.codehaus.groovy.maven.plugin.compile.TestCompileMojo.doExecute(TestCompileMojo.java:90)
    at org.codehaus.groovy.maven.plugin.MojoSupport.execute(MojoSupport.java:69)
    ... 18 more
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 7 seconds
[INFO] Finished at: Mon Aug 18 09:30:35 PDT 2008
[INFO] Final Memory: 20M/40M
[INFO] ------------------------------------------------------------------------

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