NPE in org.jboss.as.weld.deployment.processors.BeanArchiveProcessor.createBeanDeploymentArchive deploying war with WEB-INF/beans.xml but no WEB-INF/classes

13:38:34,534 INFO  [org.jboss.as] (Controller Boot Thread) JBAS015874: JBoss AS 7.2.0.Alpha1-SNAPSHOT "Steropes" started in 3686ms - Started 135 of 211 services (75 services are passive or on-demand)
13:42:03,156 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-4) JBAS015876: Starting deployment of "test.war"
13:42:03,339 INFO  [org.jboss.weld.deployer] (MSC service thread 1-3) JBAS016002: Processing weld deployment test.war
13:42:03,341 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-3) MSC00001: Failed to start service jboss.deployment.unit."test.war".POST_MODULE: org.jboss.msc.service.StartException in service jboss.deployment.unit."test.war".POST_MODULE: JBAS018733: Failed to process phase POST_MODULE of deployment "test.war"
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:123) [jboss-as-server-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1811) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1746) [jboss-msc-1.0.2.GA.jar:1.0.2.GA]
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [rt.jar:1.6.0_24]
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [rt.jar:1.6.0_24]
        at java.lang.Thread.run(Thread.java:679) [rt.jar:1.6.0_24]
Caused by: java.lang.NullPointerException
        at org.jboss.as.weld.deployment.processors.BeanArchiveProcessor.createBeanDeploymentArchive(BeanArchiveProcessor.java:168)
        at org.jboss.as.weld.deployment.processors.BeanArchiveProcessor.deploy(BeanArchiveProcessor.java:97)
        at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:116) [jboss-as-server-7.2.0.Alpha1-SNAPSHOT.jar:7.2.0.Alpha1-SNAPSHOT]
        ... 5 more

13:42:03,356 INFO  [org.jboss.as.server] (management-handler-thread - 2) JBAS015870: Deploy of deployment "test.war" was rolled back with failure message {"JBAS014671: Failed services" => {"jboss.deployment.unit.\"test.war\".POST_MODULE" => "org.jboss.msc.service.StartException in service jboss.deployment.unit.\"test.war\".POST_MODULE: JBAS018733: Failed to process phase POST_MODULE of deployment \"test.war\"
    Caused by: java.lang.NullPointerException"}}
13:42:03,371 INFO  [org.jboss.as.server.deployment] (MSC service thread 1-1) JBAS015877: Stopped deployment test.war in 14ms