[jira] [Closed] (TAP5-2000) empty element causes 'unbalanced elements' exception

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

     [ https://issues.apache.org/jira/browse/TAP5-2000?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Howard M. Lewis Ship closed TAP5-2000.
--------------------------------------

    Resolution: Cannot Reproduce

Please re-open with a test case attached.
                
> empty element causes 'unbalanced elements' exception
> ----------------------------------------------------
>
>                 Key: TAP5-2000
>                 URL: https://issues.apache.org/jira/browse/TAP5-2000
>             Project: Tapestry 5
>          Issue Type: Bug
>          Components: tapestry-core
>    Affects Versions: 5.3.3
>            Reporter: Paul Stanton
>
> consider the following TML markup:
> <col t:type="if" t:test="myTest"></col>
> If 'myTest' is true, I want to render an empty <col> element, if it is false render nothing.
> TRUE: [<col></col>]
> FALSE: []
> however the above markup causes this exception:
> Caused by: org.apache.tapestry5.ioc.internal.util.TapestryException: Component MyPage:mycomponent.if_4 has rendered unbalanced elements; either it has started an element with MarkupWriter.element() and not followed up with MarkupWriter.end(), or it has invoked MarkupWriter.end() without first invoking MarkupWriter.element(). [at classpath:com/me/components/MyComponent.tml, line 26]
> 	at org.apache.tapestry5.internal.structure.ComponentPageElementImpl$PostRenderCleanupPhase.render(ComponentPageElementImpl.java:441)
> 	at org.apache.tapestry5.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:72)
> 	... 81 more
> To work around, include any character (space) within the element:
> <col t:type="if" t:test="myTest"> </col>
> which renders:
> TRUE: [<col> </col>]
> FALSE: []
> I also imagine you could do:
> <t:if test="myTest"><col></col></t:if>

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