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https://issues.apache.org/jira/browse/VELOCITY-966?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claude Brisson reopened VELOCITY-966:
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Assignee: Claude Brisson
> RuntimeInstance.render throws null pointer exception when trying to render
> the same AST
> ----------------------------------------------------------------------------------------
>
> Key: VELOCITY-966
> URL: https://issues.apache.org/jira/browse/VELOCITY-966
> Project: Velocity
> Issue Type: Bug
> Affects Versions: 2.3
> Reporter: Alex
> Assignee: Claude Brisson
> Priority: Major
>
> The objective is to use
> *RuntimeInstance.parse* to get the parsed AST for some template and cache the
> AST.
> Then use *RuntimeInstance.render* multiple times to render the text.
>
> It appears that in version 2.3 {*}RuntimeInstance.{*}{*}render{*} invokes the
> Node.init call and at the end of the rendering clears the parser and tokens.
> On the next attempt to render init fails with the NullPointerException
> because tokens have been cleared.{*}{*}
>
> So you can not call *RuntimeInstance.render* on the same AST several times
> which seems to be the intent of this method...
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