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https://issues.apache.org/jira/browse/VELOCITY-594?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Will Glass-Husain resolved VELOCITY-594.
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       Resolution: Fixed
    Fix Version/s: 1.6

Hi,

Thanks for reporting this.  This is now fixed in svn trunk.   context.remove 
wasn't working properly within macros when the local scope was off.

WILL

> null-values cannot be set in macros
> -----------------------------------
>
>                 Key: VELOCITY-594
>                 URL: https://issues.apache.org/jira/browse/VELOCITY-594
>             Project: Velocity
>          Issue Type: Bug
>    Affects Versions: 1.5
>         Environment: Windows XP SP2
>            Reporter: jukefox
>             Fix For: 1.6
>
>
> There is an issue with the new supported feature of assigning null-values to 
> velocity variables. The following scenarios illustrate the error. The 
> configuration parameter "directive.set.null.allowed" must be set to "true".
> Scenario 1 (correct behaviour outside macro):
> #set ($test = "test")
> $test
> #set ($test = $null)
> $test
> yields to the output:
> test
> $test
> Scenario 2 (erroneous behaviour using macro):
> #macro (test)
>     #set ($test = "test")
>     $test
>     #set ($test = $null)
>     $test
> #end
> #test()
> yields to the output:
> test
> test
> and the varibale test has not been resetted to null which is the error.

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