Description of problem:
When you try to run a simple code (see the end of description) where you insert facts into disposed stateful knowledge session you get no exception warning you that you are using disposed session. However it works (fact is inserted, rules fire) the bug is that it doesn't work with named entry points. If you try inserting event into entry point you get NullPointerException:
java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:1956) 
at java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:816) 
at java.util.concurrent.ScheduledThreadPoolExecutor.delayedExecute(ScheduledThreadPoolExecutor.java:299) 
at java.util.concurrent.ScheduledThreadPoolExecutor.schedule(ScheduledThreadPoolExecutor.java:478) 
at org.drools.time.impl.JDKTimerService.schedule(JDKTimerService.java:114) 
at org.drools.time.impl.JDKTimerService.scheduleJob(JDKTimerService.java:80) 
at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:205) 
at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:145) 
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:176) 
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:145) 
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:96) 
at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:44) 
at org.jboss.qa.drools.features.cep.EventLifecycleTest.testManagedLifecycle(EventLifecycleTest.java:130)


Additional info:
StatefulKnowledgeSession session = kbase.newStatefulKnowledgeSession();
session.insert("hello world");
session.fireAllRules();

session.dispose();

session.insert("goodbye world");
session.fireAllRules();
ksession.getWorkingMemoryEntryPoint("EventStream").insert("this one throws NPE");