ClassCastException in mvel when updating a List property with modify

+                "    modify($p) { addresses.add(address) }\n" +
+                "    //$p.getAddresses().add(address); update($p);\n" +

Exception executing consequence for rule "addAddress" in defaultpkg: java.lang.ClassCastException: org.mvel2.optimizers.impl.refl.nodes.GetterAccessor cannot be cast to org.mvel2.optimizers.impl.refl.nodes.MethodAccessor
	at org.drools.core.runtime.rule.impl.DefaultConsequenceExceptionHandler.handleException(DefaultConsequenceExceptionHandler.java:39)
	at org.drools.core.common.DefaultAgenda.handleException(DefaultAgenda.java:1242)
	at org.drools.core.phreak.RuleExecutor.innerFireActivation(RuleExecutor.java:439)
	at org.drools.core.phreak.RuleExecutor.fireActivation(RuleExecutor.java:380)
	at org.drools.core.phreak.RuleExecutor.fire(RuleExecutor.java:136)
	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:89)
	at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
	at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1062)
	at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1009)
	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1001)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1330)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1321)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1305)
	at org.drools.compiler.integrationtests.Misc2Test.testModifyAddToList(Misc2Test.java:9139)