org.jboss.msc.service.DuplicateServiceException when starting EAR that contains X.war and X.jar

I am attempting to deploy the SpecJEnterprise ear on a new build of the 7.1 master (built from source) and am encountering the following exception stack:

12:31:35,178 ERROR [org.jboss.msc.service.fail] (MSC service thread 1-2) MSC00001: Failed to start service jboss.deployment.subunit."specj.ear"."specj.jar".INSTALL: org.jboss.msc.service.StartException in service jboss.deployment.subunit."specj.ear"."specj.jar".INSTALL: Failed to process phase INSTALL of subdeployment "specj.jar" of deployment "specj.ear"
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:121) [jboss-as-server-7.1.0.CR1-SNAPSHOT.jar:]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1824) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceControllerImpl$StartTask.run(ServiceControllerImpl.java:1759) [jboss-msc-1.0.1.GA.jar:]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110) [:1.7.0_b147-icedtea]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603) [:1.7.0_b147-icedtea]
at java.lang.Thread.run(Thread.java:722) [:1.7.0_b147-icedtea]
Caused by: org.jboss.as.server.deployment.DeploymentUnitProcessingException: Failed to add JBoss web deployment service
at org.jboss.as.web.deployment.WarDeploymentProcessor.processDeployment(WarDeploymentProcessor.java:269)
at org.jboss.as.web.deployment.WarDeploymentProcessor.deploy(WarDeploymentProcessor.java:104)
at org.jboss.as.server.deployment.DeploymentUnitPhaseService.start(DeploymentUnitPhaseService.java:115) [jboss-as-server-7.1.0.CR1-SNAPSHOT.jar:]
... 5 more
Caused by: org.jboss.msc.service.DuplicateServiceException: Service jboss.web.deployment.default-host./specj.realm is already registered
at org.jboss.msc.service.ServiceRegistrationImpl.setInstance(ServiceRegistrationImpl.java:154) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceControllerImpl.startInstallation(ServiceControllerImpl.java:226) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceContainerImpl.install(ServiceContainerImpl.java:560) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceTargetImpl.install(ServiceTargetImpl.java:201) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceControllerImpl$ChildServiceTarget.install(ServiceControllerImpl.java:2211) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceTargetImpl.install(ServiceTargetImpl.java:201) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceControllerImpl$ChildServiceTarget.install(ServiceControllerImpl.java:2211) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.msc.service.ServiceBuilderImpl.install(ServiceBuilderImpl.java:307) [jboss-msc-1.0.1.GA.jar:]
at org.jboss.as.web.deployment.WarDeploymentProcessor.processDeployment(WarDeploymentProcessor.java:224)
... 7 more

Specj.ear contains the following files:
jar -tf specj.ear
META-INF/
META-INF/MANIFEST.MF
specj.war
supplier.war
specj.jar
META-INF/application.xml
lib/
lib/generated-ws-buyer.jar