NPE in ExternalProcessImpl.internalCancel

2013-02-14 00:04:26,653 ERROR [threadpool:thread-7]  c.a.s.i.c.StateTransferringExecutor Error while processing asynchronous task
java.lang.NullPointerException: null
        at com.atlassian.utils.process.ExternalProcessImpl.internalCancel(ExternalProcessImpl.java:575) ~[atlassian-processutils-1.5.8.jar:na]
        at com.atlassian.utils.process.ExternalProcessImpl.wrapUpProcess(ExternalProcessImpl.java:512) ~[atlassian-processutils-1.5.8.jar:na]
        at com.atlassian.utils.process.ExternalProcessImpl.finish(ExternalProcessImpl.java:440) ~[atlassian-processutils-1.5.8.jar:na]
        at com.atlassian.stash.scm.BaseCommand$CommandFuture.get(BaseCommand.java:228) ~[stash-spi-2.1.2.jar:na]
        at com.atlassian.stash.internal.scm.git.ssh.GitSshScmRequest.handleRequest(GitSshScmRequest.java:137) ~[na:na]
        at com.atlassian.stash.ssh.server.SshScmRequestCommandAdapter$HandleRequestOperation$1.withRequest(SshScmRequestCommandAdapter.java:231) ~[na:na]
        at com.atlassian.stash.ssh.server.SshScmRequestCommandAdapter$HandleRequestOperation$1.withRequest(SshScmRequestCommandAdapter.java:222) ~[na:na]
        at com.atlassian.stash.internal.request.DefaultRequestManager.doAsRequest(DefaultRequestManager.java:71) ~[stash-service-impl-2.1.2.jar:na]
        at sun.reflect.GeneratedMethodAccessor332.invoke(Unknown Source) ~[na:na]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) ~[na:1.6.0_30]
        at java.lang.reflect.Method.invoke(Method.java:597) ~[na:1.6.0_30]
        at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.j
ava:129) ~[atlassian-plugins-osgi-2.13.0.jar:na]
        at $Proxy232.doAsRequest(Unknown Source) ~[na:na]