java.util.concurrent.ExecutionException: java.util.ConcurrentModificationException

	at java.util.concurrent.FutureTask.report(FutureTask.java:122)

	at java.util.concurrent.FutureTask.get(FutureTask.java:192)

	at org.jboss.weld.environment.se.test.context.session.BoundSessionContextTest.testConcurrentCalls(BoundSessionContextTest.java:66)

Caused by: java.util.ConcurrentModificationException: null

	at java.util.HashMap$HashIterator.nextNode(HashMap.java:1429)

	at java.util.HashMap$KeyIterator.next(HashMap.java:1453)

	at com.google.common.collect.Iterators$8.computeNext(Iterators.java:735)

	at com.google.common.collect.AbstractIterator.tryToComputeNext(AbstractIterator.java:143)

	at com.google.common.collect.AbstractIterator.hasNext(AbstractIterator.java:138)

	at com.google.common.collect.Lists.newArrayList(Lists.java:144)

	at com.google.common.collect.Collections2$FilteredCollection.toArray(Collections2.java:234)

	at java.util.ArrayList.<init>(ArrayList.java:177)

	at org.jboss.weld.context.beanstore.AbstractNamingScheme.filterIds(AbstractNamingScheme.java:74)

	at org.jboss.weld.context.beanstore.AttributeBeanStore.getPrefixedAttributeNames(AttributeBeanStore.java:198)

	at org.jboss.weld.context.beanstore.AttributeBeanStore.attach(AttributeBeanStore.java:95)

	at org.jboss.weld.context.AbstractBoundContext.activate(AbstractBoundContext.java:66)

	at org.jboss.weld.environment.se.test.context.session.BoundSessionContextTest$ConcurrentCall.call(BoundSessionContextTest.java:92)

	at org.jboss.weld.environment.se.test.context.session.BoundSessionContextTest$ConcurrentCall.call(BoundSessionContextTest.java:75)

	at java.util.concurrent.FutureTask.run(FutureTask.java:266)

	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

	at java.lang.Thread.run(Thread.java:745)