[jboss-jira] [JBoss JIRA] (JBRULES-3014) Too many error messages (and stack dumps!) due to simple syntax error

Too many error messages (and stack dumps!) due to simple syntax error --------------------------------------------------------------------- Key: JBRULES-3014 URL: https://issues.jboss.org/browse/JBRULES-3014 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: Edson Tirelli Fix For: 5.4.0.Beta2 Person( age > ($age * 2) ) ) ### typo - note the redundant ')' This produces nested Empty Stack and Class Cast Exceptions, lots of stack dumps and three error messages: [0,0]: Line 30:0 unexpected exception at input 'rule'. Exception: java.util.EmptyStackException. Stack trace: java.util.EmptyStackException at java.util.Stack.peek(Stack.java:85) at java.util.Stack.pop(Stack.java:67) 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:307) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:486) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) at express.Main.setup(Main.java:48) at express.Main.main(Main.java:92) [0,0]: Line 31:8 unexpected exception at input '"mvel"'. Exception: java.lang.ClassCastException: org.drools.lang.api.CEDescrBuilderImpl cannot be cast to org.drools.lang.api.AttributeSupportBuilder. Stack trace: java.lang.ClassCastException: org.drools.lang.api.CEDescrBuilderImpl cannot be cast to org.drools.lang.api.AttributeSupportBuilder at org.drools.lang.ParserHelper.start(ParserHelper.java:667) at org.drools.lang.DRLParser.stringAttribute(DRLParser.java:1294) at org.drools.lang.DRLParser.attribute(DRLParser.java:1073) at org.drools.lang.DRLParser.statement(DRLParser.java:257) 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:307) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:486) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) at express.Main.setup(Main.java:48) at express.Main.main(Main.java:92) [31,8]: [ERR 107] Line 31:8 mismatched input '"mvel"' expecting one of the following tokens: '[package, import, global, declare, function, rule, query]'. [0,0]: Line 39:0 unexpected exception at input 'rule'. Exception: java.util.EmptyStackException. Stack trace: java.util.EmptyStackException at java.util.Stack.peek(Stack.java:85) at java.util.Stack.pop(Stack.java:67) 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:307) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:486) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) at express.Main.setup(Main.java:48) at express.Main.main(Main.java:92)