[jira] [Closed] (TAP5-2154) Environment keys with empty associated stacks should not be listed as available

["Howard M. Lewis Ship (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/TAP5-2154?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship closed TAP5-2154.
--------------------------------------

       Resolution: Fixed
    Fix Version/s: 5.4
         Assignee: Howard M. Lewis Ship

> Environment keys with empty associated stacks should not be listed as available
> -------------------------------------------------------------------------------
>
>                 Key: TAP5-2154
>                 URL: https://issues.apache.org/jira/browse/TAP5-2154
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.4
>            Reporter: Jochen Kemnade
>            Assignee: Howard M. Lewis Ship
>              Labels: error-feedback, patch, test
>             Fix For: 5.4
>
>         Attachments: 0001-don-t-list-environment-keys-with-empty-stacks.patch
>
>
> I just got the confusing error message:
> No object of type org.apache.tapestry5.services.Heartbeat is available from the Environment.
> Available values:
>  * org.apache.tapestry5.services.Heartbeat
> ..
> That happened because Heartbeat had been pushed and popped during the render cycle. The problem is, that Heartbeat is still a key in the map of available objects, but the list/stack of associated objects is empty.
> The patch removes entries removes those keys from the AvailableValues values list.



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