This happened when I tried to use clientspec *not manged by hudson*.
In the job configuration: the workspace is `ang_ps_hudson_test`

Started by user xxx
Building remotely on ccc.example.com
Using remote perforce client: ang_ps_hudson_test-2009646975
[ang_ps_hudson_test] $ p4 workspace -o ang_ps_hudson_test-2009646975
[ang_ps_hudson_test] $ p4 login -p
[ang_ps_hudson_test] $ p4 -P 8D910F44B59A47C1C38C001A2DCCB7A2 workspace -o ang_ps_hudson_test-2009646975
FATAL: null
java.lang.NullPointerException
at hudson.plugins.perforce.PerforceSCM.parseProjectPath(PerforceSCM.java:1340)
at hudson.plugins.perforce.PerforceSCM.getPerforceWorkspace(PerforceSCM.java:1002)
at hudson.plugins.perforce.PerforceSCM.checkout(PerforceSCM.java:504)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1082)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:479)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:411)
at hudson.model.Run.run(Run.java:1273)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:137)