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http://jira.codehaus.org/browse/MCHANGES-97?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_122138
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Dennis Lundberg commented on MCHANGES-97:
-----------------------------------------
I am unable to reproduce this error. Could you provide a minimal project that
exploits this bug?
> Fix VTL errors
> --------------
>
> Key: MCHANGES-97
> URL: http://jira.codehaus.org/browse/MCHANGES-97
> Project: Maven 2.x Changes Plugin
> Issue Type: Improvement
> Components: announcement
> Affects Versions: 2.0-beta-3
> Reporter: Benjamin Bentmann
> Priority: Trivial
> Attachments: changes.xml, vtl-errors.patch
>
>
> When calling {{mvn changes:announcement-generate}} for the attached
> {{changes.xml}} VTL errors are logged due to the various null fields in the
> {{Action}} bean:
> {noformat}
> [INFO] [changes:announcement-generate]
> [INFO] Creating announcement file from changes.xml...
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 30, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 31, column 1]
> [ERROR] Left side ($!issue) of '!=' operation has null value. Operation not
> possible. org/apache/maven/plugin/announcement/announcement.vm [line 32,
> column 27]
> [ERROR] Left side ($!dueto) of '!=' operation has null value. Operation not
> possible. org/apache/maven/plugin/announcement/announcement.vm [line 32,
> column 65]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 43, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 44, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 56, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 57, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 69, column 1]
> [ERROR] RHS of #set statement is null. Context will not be modified.
> org/apache/maven/plugin/announcement/announcement.vm [line 70, column 1]
> [INFO] File created...
> {noformat}
> The attached patch goes the hard way and improves the VTL template to check
> for nulls. Easier would be to establish an invariant for the bean properties
> stating that they are never null but maybe empty, i.e. change all the setters
> to convert null into an empty string.
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