OsgiServiceRegistryTracker ends with NullPointerException instead of a meaningful error when invalid interface is specified

FuseESB:karaf@root> osgi:install -s fab:mvn:org.fusesource.examples/interface-test/7.0.0.fuse-061
ERROR: Bundle org.apache.servicemix.nmr.osgi [223] EventDispatcher: Error during dispatch. (java.lang.NullPointerException)
java.lang.NullPointerException
	at java.util.concurrent.ConcurrentHashMap.putIfAbsent(ConcurrentHashMap.java:896)
	at org.apache.servicemix.nmr.core.ServiceRegistryImpl.register(ServiceRegistryImpl.java:45)
	at org.apache.servicemix.nmr.osgi.OsgiServiceRegistryTracker.addingService(OsgiServiceRegistryTracker.java:78)
	at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:980)
		at org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:1)
	at org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:262)
	at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:234)
	at org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:941)
	at org.apache.felix.framework.util.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:934)
	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:795)
	at org.apache.felix.framework.util.EventDispatcher.fireServiceEvent(EventDispatcher.java:544)
	at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4337)
	at org.apache.felix.framework.Felix.registerService(Felix.java:3352)
	at org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:346)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.registerService(BlueprintContainerImpl.java:410)
	at org.apache.aries.blueprint.container.ServiceRecipe.register(ServiceRecipe.java:184)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.registerServices(BlueprintContainerImpl.java:653)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.doRun(BlueprintContainerImpl.java:336)
	at org.apache.aries.blueprint.container.BlueprintContainerImpl.run(BlueprintContainerImpl.java:232)
	at org.apache.aries.blueprint.container.BlueprintExtender.checkBundle(BlueprintExtender.java:325)
	at org.apache.aries.blueprint.container.BlueprintExtender.bundleChanged(BlueprintExtender.java:244)
	at org.apache.aries.blueprint.container.BlueprintExtender$BlueprintBundleTrackerCustomizer.modifiedBundle(BlueprintExtender.java:471)
	at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:495)
	at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:1)
	at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:238)
	at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:457)
	at org.apache.felix.framework.util.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:870)
	at org.apache.felix.framework.util.EventDispatcher.fireEventImmediately(EventDispatcher.java:791)
	at org.apache.felix.framework.util.EventDispatcher.fireBundleEvent(EventDispatcher.java:515)
	at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4321)
	at org.apache.felix.framework.Felix.startBundle(Felix.java:1945)
	at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:947)
	at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:934)
	at org.apache.karaf.shell.osgi.InstallBundle.doExecute(InstallBundle.java:51)
	at org.apache.karaf.shell.console.OsgiCommandSupport.execute(OsgiCommandSupport.java:38)
	at org.apache.felix.gogo.commands.basic.AbstractCommand.execute(AbstractCommand.java:35)
	at org.apache.felix.gogo.runtime.CommandProxy.execute(CommandProxy.java:78)
	at org.apache.felix.gogo.runtime.Closure.executeCmd(Closure.java:474)
	at org.apache.felix.gogo.runtime.Closure.executeStatement(Closure.java:400)
	at org.apache.felix.gogo.runtime.Pipe.run(Pipe.java:108)
	at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:183)
	at org.apache.felix.gogo.runtime.Closure.execute(Closure.java:120)
	at org.apache.felix.gogo.runtime.CommandSessionImpl.execute(CommandSessionImpl.java:89)
	at org.apache.karaf.shell.console.jline.Console.run(Console.java:226)
	at java.lang.Thread.run(Thread.java:680)