[jboss-jira] [JBoss JIRA] (DROOLS-452) MVEL validates illegal expressions using ":"

[Petr Široký (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13149690#comment-13149690 ] 

Petr Široký commented on DROOLS-452:
------------------------------------

It seems this has been fixed over the time. Trying to reproduce, I am getting compile-time error

{code}
java.lang.RuntimeException: [Message [id=1, level=ERROR, path=file0.drl, line=1, column=0
   text=Unable to Analyse Expression System.out.println( "Hello" ):  ;:
[Error: Malformed expression]
[Near : {... System.out.println( "Hello" ):  ; ....}]
                                             ^
[Line: 1, Column: 33]]]
{code}

The message looks a bit weird though. Not sure why the additional ";:" is there. [~dsotty] could you double check the above message if it is something you would expect?

> MVEL validates illegal expressions using ":"
> --------------------------------------------
>
>                 Key: DROOLS-452
>                 URL: https://issues.jboss.org/browse/DROOLS-452
>             Project: Drools
>          Issue Type: Bug
>            Reporter: Davide Sottara
>            Assignee: Petr Široký
>            Priority: Minor
>
> A rule like this
> {code}
> rule "Typo"
> dialect "mvel"
> when
>   ...
> then
>   // Notice the ":" in place of ";". There is also a \n at the end of the line
>   System.out.println( "Hello" ):  
>   // more statements here
> end
> {code}
> MVEL will validate the RHS at compile time. 
> At runtime, the printout (actually any statement ending with ":") will be
> executed, but MVEL will fail silently thereafter. The rest of the conclusion
> will not be evaluated.



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