[GSS] (6.4.z) NoClassDefFoundError is thrown on updateToVersion() with rule removal and eval

Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 1.801 sec <<< FAILURE! - in org.drools.compiler.integrationtests.incrementalcompilation.IncrementalCompilationTest
testRuleRemovalAndEval(org.drools.compiler.integrationtests.incrementalcompilation.IncrementalCompilationTest)  Time elapsed: 1.799 sec  <<< ERROR!
java.lang.NoClassDefFoundError: org/drools/compiler/Rule_R2773041198
	at org.drools.core.common.ProjectClassLoader.tryDefineType(ProjectClassLoader.java:191)
	at org.drools.core.common.ProjectClassLoader.loadType(ProjectClassLoader.java:181)
	at org.drools.core.common.ProjectClassLoader.loadClass(ProjectClassLoader.java:148)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.drools.core.rule.JavaDialectRuntimeData$PackageClassLoader.loadClass(JavaDialectRuntimeData.java:575)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	at org.drools.compiler.Rule_R2773041198Eval0InvokerGenerated.evaluate(Unknown Source)
	at org.drools.compiler.Rule_R2773041198Eval0Invoker.evaluate(Unknown Source)
	at org.drools.core.rule.EvalCondition.isAllowed(EvalCondition.java:129)
	at org.drools.core.phreak.PhreakEvalNode.doLeftInserts(PhreakEvalNode.java:72)
	at org.drools.core.phreak.PhreakEvalNode.doNode(PhreakEvalNode.java:56)
	at org.drools.core.phreak.RuleNetworkEvaluator.evalNode(RuleNetworkEvaluator.java:381)
	at org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:333)
	at org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:169)
	at org.drools.core.phreak.AddRemoveRule.forceFlushLeftTuple(AddRemoveRule.java:676)
	at org.drools.core.phreak.AddRemoveRule.flushStagedTuples(AddRemoveRule.java:604)
	at org.drools.core.phreak.AddRemoveRule.removeRule(AddRemoveRule.java:164)
	at org.drools.core.reteoo.ReteooBuilder.removeTerminalNode(ReteooBuilder.java:191)
	at org.drools.core.reteoo.ReteooBuilder.removeRules(ReteooBuilder.java:177)
	at org.drools.core.impl.KnowledgeBaseImpl.removeObjectsGeneratedFromResource(KnowledgeBaseImpl.java:1740)
	at org.drools.compiler.builder.impl.KnowledgeBuilderImpl.removeObjectsGeneratedFromResource(KnowledgeBuilderImpl.java:2281)
	at org.drools.compiler.kie.builder.impl.KieBaseUpdater.run(KieBaseUpdater.java:66)
	at org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:734)
	at org.drools.compiler.kie.builder.impl.KieContainerImpl.update(KieContainerImpl.java:245)
	at org.drools.compiler.kie.builder.impl.KieContainerImpl.updateToVersion(KieContainerImpl.java:182)
	at org.drools.compiler.integrationtests.incrementalcompilation.IncrementalCompilationTest.testRuleRemovalAndEval(IncrementalCompilationTest.java:4708)