Running the build from sources, seeing some exceptions one of which is a NPE -
is this an expected exception?

org.apache.uima.analysis_engine.AnalysisEngineProcessException: Annotator
processing failed.
        at org.apache.uima.ruta.engine.RutaEngine.process(RutaEngine.java:497)
        at
org.apache.uima.analysis_component.JCasAnnotator_ImplBase.process(JCasAnnotator_ImplBase.java:48)
        at
org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.callAnalysisComponentProcess(PrimitiveAnalysisEngine_impl.java:396)
        at
org.apache.uima.analysis_engine.impl.PrimitiveAnalysisEngine_impl.processAndOutputNewCASes(PrimitiveAnalysisEngine_impl.java:314)
        at
org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:269)
        at
org.apache.uima.analysis_engine.impl.AnalysisEngineImplBase.process(AnalysisEngineImplBase.java:284)
        at org.apache.uima.ruta.engine.Ruta.applyRule(Ruta.java:86)
        at org.apache.uima.ruta.engine.Ruta.matches(Ruta.java:273)
        at
org.apache.uima.ruta.expression.annotation.AnnotationLabelExpressionTest.testWrongFeature(AnnotationLabelExpressionTest.java:309)

...
Caused by: java.lang.NullPointerException
        at
org.apache.uima.ruta.expression.feature.LazyFeature.getRange(LazyFeature.java:66)
        at
org.apache.uima.ruta.expression.feature.SimpleFeatureExpression.collectFeatureAnnotations(SimpleFeatureExpression.java:186)
        at
org.apache.uima.ruta.expression.feature.SimpleFeatureExpression.collectFeatureAnnotations(SimpleFeatureExpression.java:157)
        at
org.apache.uima.ruta.expression.feature.SimpleFeatureExpression.getFeatureAnnotations(SimpleFeatureExpression.java:145)
        at
org.apache.uima.ruta.condition.ImplicitCondition.eval(ImplicitCondition.java:73)
        at
org.apache.uima.ruta.rule.RutaRuleElement.doMatch(RutaRuleElement.java:393)
        at
org.apache.uima.ruta.rule.RutaRuleElement.continueMatch(RutaRuleElement.java:228)
        at
org.apache.uima.ruta.rule.RutaRuleElement.startMatch(RutaRuleElement.java:89)
        at
org.apache.uima.ruta.rule.ComposedRuleElement.startMatch(ComposedRuleElement.java:74)
        at org.apache.uima.ruta.rule.RutaRule.apply(RutaRule.java:63)
        at org.apache.uima.ruta.rule.RutaRule.apply(RutaRule.java:54)
        at org.apache.uima.ruta.rule.RutaRule.apply(RutaRule.java:36)
        at 
org.apache.uima.ruta.block.RutaScriptBlock.apply(RutaScriptBlock.java:66)
        at org.apache.uima.ruta.RutaModule.apply(RutaModule.java:56)
        at org.apache.uima.ruta.engine.RutaEngine.process(RutaEngine.java:495)
        ... 32
more                                                                            
    


-Marshall

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