Mario Fusco created JBRULES-3627: ------------------------------------ Summary: NPE using a null literal in the left part of a constraint Key: JBRULES-3627 URL: https://issues.jboss.org/browse/JBRULES-3627 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Reporter: Mario Fusco Assignee: Mario Fusco Trying to use a constraint with a null literal on its left side like in: Person( null == name ) generates the following exception: java.lang.NullPointerException at java.lang.String.<init>(String.java:177) at org.mvel2.util.ErrorUtil.rewriteIfNeeded(ErrorUtil.java:12) at org.mvel2.compiler.ExpressionCompiler._compile(ExpressionCompiler.java:302) at org.mvel2.compiler.ExpressionCompiler.compile(ExpressionCompiler.java:62) at org.mvel2.MVEL.compileExpression(MVEL.java:810) at org.drools.base.mvel.MVELCompilationUnit.compile(MVELCompilationUnit.java:442) at org.drools.base.mvel.MVELCompilationUnit.getCompiledExpression(MVELCompilationUnit.java:238) at org.drools.rule.constraint.MvelConstraint.createMvelConditionEvaluator(MvelConstraint.java:173) at org.drools.rule.constraint.MvelConstraint.evaluate(MvelConstraint.java:157) at org.drools.rule.constraint.MvelConstraint.isAllowed(MvelConstraint.java:124) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:137) at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) at org.drools.reteoo.AlphaNode.assertObject(AlphaNode.java:141) at org.drools.reteoo.CompositeObjectSinkAdapter.doPropagateAssertObject(CompositeObjectSinkAdapter.java:497) at org.drools.reteoo.CompositeObjectSinkAdapter.propagateAssertObject(CompositeObjectSinkAdapter.java:382) at org.drools.reteoo.ObjectTypeNode.assertObject(ObjectTypeNode.java:235) at org.drools.reteoo.EntryPointNode.assertObject(EntryPointNode.java:240) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:337) at org.drools.common.NamedEntryPoint.insert(NamedEntryPoint.java:298) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:888) at org.drools.common.AbstractWorkingMemory.insert(AbstractWorkingMemory.java:847) at org.drools.impl.StatefulKnowledgeSessionImpl.insert(StatefulKnowledgeSessionImpl.java:269) at org.drools.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:303) -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira