Compiler bug while running Drools rule: "Expecting to find integer on stack"

Excerpt from application log (DateUtils there is 'org.apache.commons.lang.time.DateUtils'):

• • • • COMPILER BUG! REPORT THIS IMMEDIATELY AT http://jira.codehaus.org/browse/mvel2
        Expression: DateUtils.addDays(new Date(), -2)
        2011-11-03 17:24:05 JobRunShell [ERROR] Job DEFAULT.XXXXXXXJob threw an unhandled Exception:
        java.lang.VerifyError: (class: ASMAccessorImpl_7529044951320333845290, method: getValue signature: (Ljava/lang/Object;Ljava/lang/Object;Lorg/mvel2/integration/VariableResolverFactory;)Ljava/lang/Object Expecting to find integer on stack
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
        at java.lang.Class.getConstructor0(Class.java:2699)
        at java.lang.Class.getConstructor(Class.java:1657)
        at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer._initializeAccessor(ASMAccessorOptimizer.java:719)
        at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer.compileAccessor(ASMAccessorOptimizer.java:846)
        at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer.optimizeAccessor(ASMAccessorOptimizer.java:240)
        at org.mvel2.optimizers.dynamic.DynamicGetAccessor.optimize(DynamicGetAccessor.java:90)
        at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:64)
        at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:110)
        at org.mvel2.MVELRuntime.execute(MVELRuntime.java:89)
        at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:125)
        at org.mvel2.MVEL.executeExpression(MVEL.java:928)
        at org.drools.base.mvel.MVELReturnValueExpression.evaluate(MVELReturnValueExpression.java:104)
        at org.drools.rule.ReturnValueRestriction.isAllowed(ReturnValueRestriction.java:248)
        at org.drools.rule.VariableConstraint.isAllowed(VariableConstraint.java:107)
        at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
        at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
        at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134)
        at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
        at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:193)
        at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:191)
        at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:332)
        at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:293)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)
        at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:255)
        ...
        at org.quartz.core.JobRunShell.run(JobRunShell.java:206)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:548)
        org.quartz.SchedulerException: Job threw an unhandled exception. [See nested exception: java.lang.VerifyError: (class: ASMAccessorImpl_7529044951320333845290, method: getValue signature: (Ljava/lang/Object;Ljava/lang/Object;Lorg/mvel2/integration/VariableResolverFactory;)Ljava/lang/Object;) Expecting to find integer on stack]
        at org.quartz.core.JobRunShell.run(JobRunShell.java:217)
        at org.quartz.simpl.SimpleThreadPool$WorkerThread.run(SimpleThreadPool.java:548)
        Caused by: java.lang.VerifyError: (class: ASMAccessorImpl_7529044951320333845290, method: getValue signature: (Ljava/lang/Object;Ljava/lang/Object;Lorg/mvel2/integration/VariableResolverFactory;)Ljava/lang/Object Expecting to find integer on stack
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
        at java.lang.Class.getConstructor0(Class.java:2699)
        at java.lang.Class.getConstructor(Class.java:1657)
        at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer._initializeAccessor(ASMAccessorOptimizer.java:719)
        at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer.compileAccessor(ASMAccessorOptimizer.java:846)
        at org.mvel2.optimizers.impl.asm.ASMAccessorOptimizer.optimizeAccessor(ASMAccessorOptimizer.java:240)
        at org.mvel2.optimizers.dynamic.DynamicGetAccessor.optimize(DynamicGetAccessor.java:90)
        at org.mvel2.optimizers.dynamic.DynamicGetAccessor.getValue(DynamicGetAccessor.java:64)
        at org.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:110)
        at org.mvel2.MVELRuntime.execute(MVELRuntime.java:89)
        at org.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:125)
        at org.mvel2.MVEL.executeExpression(MVEL.java:928)
        at org.drools.base.mvel.MVELReturnValueExpression.evaluate(MVELReturnValueExpression.java:104)
        at org.drools.rule.ReturnValueRestriction.isAllowed(ReturnValueRestriction.java:248)
        at org.drools.rule.VariableConstraint.isAllowed(VariableConstraint.java:107)
        at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:130)
        at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
        at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:134)
        at org.drools.reteoo.SingleObjectSinkAdapter.propagateAssertObject(SingleObjectSinkAdapter.java:59)
        at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:193)
        at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:191)
        at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:332)
        at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:293)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:905)
        at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:864)
        at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:255)
        ...