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https://issues.apache.org/jira/browse/ISIS-2897?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17445306#comment-17445306
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Andi Huber commented on ISIS-2897:
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Reproducible with with e.g. demo's JavaMathBigIntegerHolder_actionReturning
using JDO. JPA however seems to work.
> Wicket viewer caching old instance of mixin (and thus entity), resulting in
> NPE when invoke action prompt
> ---------------------------------------------------------------------------------------------------------
>
> Key: ISIS-2897
> URL: https://issues.apache.org/jira/browse/ISIS-2897
> Project: Isis
> Issue Type: Bug
> Reporter: Daniel Keir Haywood
> Assignee: Andi Huber
> Priority: Critical
> Fix For: 2.0.0-M7
>
>
> Mixed in actions on an entity instance do receive a detached mixee (entity)
> object. Seen with JDO.
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