An NPE occurs in this test:

[wstools] java.lang.NullPointerException
[wstools] at java.lang.Class.isAssignableFrom(Native Method)
[wstools] at org.jboss.ws.tools.helpers.JavaToWSDLHelper.generateType(JavaToWSDLHelper.java:389)
[wstools] at org.jboss.ws.tools.helpers.JavaToWSDLHelper.generateTypesForXSD(JavaToWSDLHelper.java:122)
[wstools] at org.jboss.ws.tools.JavaToWSDL11.handleJavaToWSDLGeneration(JavaToWSDL11.java:219)
[wstools] at org.jboss.ws.tools.JavaToWSDL11.generate(JavaToWSDL11.java:164)
[wstools] at org.jboss.ws.tools.JavaToWSDL.generate(JavaToWSDL.java:279)
[wstools] at org.jboss.ws.tools.helpers.ToolsHelper.handleJavaToWSDLGeneration(ToolsHelper.java:98)
[wstools] at org.jboss.ws.tools.jbossws.process(jbossws.java:97)
[wstools] at org.jboss.ws.tools.jbossws.generate(jbossws.java:84)
[wstools] at org.jboss.ws.tools.ant.wstools.execute(wstools.java:103)
[wstools] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
[wstools] at org.apache.tools.ant.Task.perform(Task.java:364)
[wstools] at org.apache.tools.ant.Target.execute(Target.java:341)
[wstools] at org.apache.tools.ant.Target.performTasks(Target.java:369)
[wstools] at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
[wstools] at org.apache.tools.ant.taskdefs.Ant.execute(Ant.java:386)
[wstools] at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:275)
[wstools] at org.apache.tools.ant.Task.perform(Task.java:364)
[wstools] at org.apache.tools.ant.Target.execute(Target.java:341)
[wstools] at org.apache.tools.ant.Target.performTasks(Target.java:369)
[wstools] at org.apache.tools.ant.Project.executeTarget(Project.java:1214)
[wstools] at org.apache.tools.ant.Project.executeTargets(Project.java:1062)
[wstools] at org.apache.tools.ant.Main.runBuild(Main.java:673)
[wstools] at org.apache.tools.ant.Main.startAnt(Main.java:188)
[wstools] at org.apache.tools.ant.launch.Launcher.run(Launcher.java:196)
[wstools] at org.apache.tools.ant.launch.Launcher.main(Launcher.java:55)