Invalid comparison operator (=) causes EmptyStackException in DRLParser/ParserHelper ------------------------------------------------------------------------------------ Key: JBRULES-3002 URL: https://issues.jboss.org/browse/JBRULES-3002 Project: Drools Issue Type: Bug Security Level: Public (Everyone can see) Components: drools-compiler (expert) Affects Versions: 5.2.0.M2 Reporter: Wolfgang Laun Assignee: Mark Proctor class Customer { int custid; //... } rule x when $c: Customer( custid = 100 ) // Typo, wanted: "==" then end [0,0]: Line 47:0 unexpected exception at input 'rule'. Exception: java.util.EmptyStackException. Stack trace: java.util.EmptyStackException at java.util.Stack.peek(Stack.java:102) at java.util.Stack.pop(Stack.java:84) at org.drools.lang.ParserHelper.popParaphrases(ParserHelper.java:409) at org.drools.lang.ParserHelper.end(ParserHelper.java:723) at org.drools.lang.DRLParser.rule(DRLParser.java:915) at org.drools.lang.DRLParser.statement(DRLParser.java:248) at org.drools.lang.DRLParser.compilationUnit(DRLParser.java:143) at org.drools.compiler.DrlParser.compile(DrlParser.java:225) at org.drools.compiler.DrlParser.parse(DrlParser.java:136) at org.drools.compiler.DrlParser.parse(DrlParser.java:141) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:292) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:471) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) -- This message is automatically generated by JIRA. For more information on JIRA, see: http://www.atlassian.com/software/jira