NullPointerException when trying to remove a system-property which does not exist

{
    "operation" => "remove",
    "address" => [
        ("host" => "master"),
        ("server-config" => "server-1"),
        ("system-property" => "foo")
    ]
}

{
    "outcome" => "failed",
    "failure-description" => {"host-failure-descriptions" => [("master" => "JBAS014749: Operation handler failed: null")]},
    "rolled-back" => true
}

[Host Controller] 2012-03-27 15:41:04,870 [management-handler-thread - 30] ERROR org.jboss.as.controller.management-operation executeStep 418 - JBAS014612: Operation ("remove") failed - address: ([
[Host Controller]     ("host" => "master"),
[Host Controller]     ("server-config" => "server-1"),
[Host Controller]     ("system-property" => "foo")
[Host Controller] ]): java.lang.NullPointerException
[Host Controller]       at org.jboss.as.controller.operations.common.SystemPropertyRemoveHandler.execute(SystemPropertyRemoveHandler.java:67) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:385) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:272) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:200) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.domain.controller.operations.coordination.DomainFinalResultHandler.execute(DomainFinalResultHandler.java:74) [jboss-as-host-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:385) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:272) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:200) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.domain.controller.operations.coordination.OperationCoordinatorStepHandler.executeTwoPhaseOperation(OperationCoordinatorStepHandler.java:225) [jboss-as-host-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.domain.controller.operations.coordination.OperationCoordinatorStepHandler.execute(OperationCoordinatorStepHandler.java:118) [jboss-as-host-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.domain.controller.operations.coordination.PrepareStepHandler.execute(PrepareStepHandler.java:85) [jboss-as-host-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.executeStep(AbstractOperationContext.java:385) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.doCompleteStep(AbstractOperationContext.java:272) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.AbstractOperationContext.completeStep(AbstractOperationContext.java:200) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.ModelControllerImpl.execute(ModelControllerImpl.java:121) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler.doExecute(ModelControllerClientOperationHandler.java:139) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.controller.remote.ModelControllerClientOperationHandler$ExecuteRequestHandler$1.execute(ModelControllerClientOperationHandler.java:108) [jboss-as-controller-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.protocol.mgmt.AbstractMessageHandler$2$1.doExecute(AbstractMessageHandler.java:287) [jboss-as-protocol-7.1.1.Final.jar:7.1.1.Final]
[Host Controller]       at org.jboss.as.protocol.mgmt.AbstractMessageHandler$AsyncTaskRunner.run(AbstractMessageHandler.java:487) [jboss-as-protocol-7.1.1.Final.jar:7.1.1.Final]

{
    "operation" => "remove",
    "address" => [
        ("host" => "master"),
        ("server-config" => "server-1"),
        ("jvm" => "default")
    ]
}

{
    "outcome" => "failed",
    "failure-description" => {"host-failure-descriptions" => [("master" => "JBAS014807: Management resource '[
    (\"host\" => \"master\"),
    (\"server-config\" => \"server-1\"),
    (\"jvm\" => \"default\")
]' not found")]},
    "rolled-back" => true
}