nasty mvel stacktrace

       java.lang.Throwable.fillInStackTrace(Native Method)
       java.lang.Throwable.fillInStackTrace(Throwable.java:782)
       java.lang.Throwable.<init>(Throwable.java:265)
       java.lang.Exception.<init>(Exception.java:66)
       java.lang.RuntimeException.<init>(RuntimeException.java:62)
       java.lang.IllegalArgumentException.<init>(IllegalArgumentException.java:53)
       sun.reflect.GeneratedMethodAccessor247.invoke(Unknown Source)
       sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
       java.lang.reflect.Method.invoke(Method.java:606)
       org.elasticsearch.common.mvel2.optimizers.impl.refl.nodes.GetterAccessor.getValue(GetterAccessor.java:43)
       org.elasticsearch.common.mvel2.optimizers.impl.refl.nodes.MapAccessorNest.getValue(MapAccessorNest.java:54)
       org.elasticsearch.common.mvel2.optimizers.impl.refl.nodes.VariableAccessor.getValue(VariableAccessor.java:37)
       org.elasticsearch.common.mvel2.ast.ASTNode.getReducedValueAccelerated(ASTNode.java:108)
       org.elasticsearch.common.mvel2.MVELRuntime.execute(MVELRuntime.java:86)
       org.elasticsearch.common.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
       org.elasticsearch.common.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
       org.elasticsearch.common.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:106)
       org.elasticsearch.common.mvel2.ast.Substatement.getReducedValueAccelerated(Substatement.java:44)
       org.elasticsearch.common.mvel2.ast.BinaryOperation.getReducedValueAccelerated(BinaryOperation.java:114)
       org.elasticsearch.common.mvel2.MVELRuntime.execute(MVELRuntime.java:86)
       org.elasticsearch.common.mvel2.compiler.CompiledExpression.getDirectValue(CompiledExpression.java:123)
       org.elasticsearch.common.mvel2.compiler.CompiledExpression.getValue(CompiledExpression.java:119)
       org.elasticsearch.script.mvel.MvelScriptEngineService$MvelSearchScript.run(MvelScriptEngineService.java:191)
       org.elasticsearch.script.mvel.MvelScriptEngineService$MvelSearchScript.runAsDouble(MvelScriptEngineService.java:206)
       org.elasticsearch.common.lucene.search.function.ScriptScoreFunction.score(ScriptScoreFunction.java:54)
       org.elasticsearch.common.lucene.search.function.FiltersFunctionScoreQuery$CustomBoostFactorScorer.score(FiltersFunctionScoreQuery.java:320)
       org.apache.lucene.search.TopScoreDocCollector$OutOfOrderTopScoreDocCollector.collect(TopScoreDocCollector.java:140)
       org.apache.lucene.search.Scorer.score(Scorer.java:65)
       org.apache.lucene.search.IndexSearcher.search(IndexSearcher.java:621)