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https://issues.apache.org/jira/browse/TAP5-636?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship updated TAP5-636:
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Summary: Using Element.forceAttribute() with a null value can cause a later
NPE during rendering under some circumstances (was: NPE inside
Attribute.write() if value is null)
> Using Element.forceAttribute() with a null value can cause a later NPE during
> rendering under some circumstances
> ----------------------------------------------------------------------------------------------------------------
>
> Key: TAP5-636
> URL: https://issues.apache.org/jira/browse/TAP5-636
> Project: Tapestry 5
> Issue Type: Bug
> Components: tapestry-core
> Affects Versions: 5.1.0.3
> Reporter: Howard M. Lewis Ship
> Assignee: Howard M. Lewis Ship
>
> An unexpected application exception has occurred.
> * java.lang.NullPointerException
> *
> org.apache.tapestry5.dom.AbstractMarkupModel.encodeQuoted(AbstractMarkupModel.java:94)
> * org.apache.tapestry5.dom.Attribute.render(Attribute.java:69)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:313)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Element.writeChildMarkup(Element.java:835)
> * org.apache.tapestry5.dom.Element.toMarkup(Element.java:351)
> * org.apache.tapestry5.dom.Document.toMarkup(Document.java:163)
> * org.apache.tapestry5.dom.Node.toMarkup(Node.java:80)
> *
> org.apache.tapestry5.internal.services.MarkupWriterImpl.toMarkup(MarkupWriterImpl.java:57)
> *
> org.apache.tapestry5.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:67)
> *
> $PageResponseRenderer_12085541484.renderPageResponse($PageResponseRenderer_12085541484.java)
> The real question is: how can the value ever be null? Adding an attribute
> that's null, or overriding an attribute to null, should remove it from the
> list.
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