[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-2970) EmptyStackException due to typo "rom entry-point"

[Edson Tirelli (JIRA)]

     [ https://issues.jboss.org/browse/JBRULES-2970?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Edson Tirelli resolved JBRULES-2970.
------------------------------------

    Resolution: Done


Removed the context stack from the parser in order to make code more robust and avoid these EmptyStackException errors.

> EmptyStackException due to typo "rom entry-point"
> -------------------------------------------------
>
>                 Key: JBRULES-2970
>                 URL: https://issues.jboss.org/browse/JBRULES-2970
>             Project: Drools
>          Issue Type: Bug
>      Security Level: Public(Everyone can see) 
>          Components: drools-compiler
>    Affects Versions: 5.2.0.M2
>            Reporter: Wolfgang Laun
>            Assignee: Edson Tirelli
>             Fix For: 5.2.0.CR1
>
>
> Note the 'f' missing from "from"
> rule addToken
> when
>     $s: Sale( discount == null ) rom entry-point "cash"
> then
> end
> [5,37]: [ERR 102] Line 5:37 mismatched input 'entry' in rule "addToken"
> [0,0]: Line 13:0 unexpected exception at input 'function'. 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.function(DRLParser.java:621)
> 	at org.drools.lang.DRLParser.statement(DRLParser.java:254)
> 	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)
> 	at rss.drools.setup.Application.setup(Application.java:47)

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