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https://issues.apache.org/jira/browse/TAPESTRY-1819?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Howard M. Lewis Ship closed TAPESTRY-1819.
------------------------------------------

    Resolution: Duplicate
      Assignee: Howard M. Lewis Ship

Duplicate of TAPESTRY-1978.

> When the value of @t:validate="" meaningless 
> java.lang.IllegalArgumentException is given
> ----------------------------------------------------------------------------------------
>
>                 Key: TAPESTRY-1819
>                 URL: https://issues.apache.org/jira/browse/TAPESTRY-1819
>             Project: Tapestry
>          Issue Type: Improvement
>          Components: Framework
>    Affects Versions: 5.0.6
>         Environment: T5.0.6-SNAPSHOT, WinXP, Jetty 5.1.12, Eclipse 3.2
>            Reporter: Michael Gerzabek
>            Assignee: Howard M. Lewis Ship
>            Priority: Minor
>
> @t:validate="" brings only exception log rather than the nice "on line bla 
> there is @t:validate and it's empty"
> java.lang.IllegalArgumentException
> Parameter expression was null or contained only whitespace.
> Stack trace
>         * 
> org.apache.tapestry.ioc.internal.util.Defense.notBlank(Defense.java:71)
>         * 
> org.apache.tapestry.internal.services.BindingSourceImpl.newBinding(BindingSourceImpl.java:51)
>         * 
> org.apache.tapestry.internal.services.PageElementFactoryImpl.newBinding(PageElementFactoryImpl.java:395)
>         * 
> org.apache.tapestry.internal.services.PageLoaderProcessor.findBinding(PageLoaderProcessor.java:243)
>         * 
> org.apache.tapestry.internal.services.PageLoaderProcessor.bindParameterFromTemplate(PageLoaderProcessor.java:140)
>         * 
> org.apache.tapestry.internal.services.PageLoaderProcessor.attribute(PageLoaderProcessor.java:290)
>         * 
> org.apache.tapestry.internal.services.PageLoaderProcessor.loadTemplateForComponent(PageLoaderProcessor.java:502)
>         * 
> org.apache.tapestry.internal.services.PageLoaderProcessor.workComponentQueue(PageLoaderProcessor.java:714)
>         * 
> org.apache.tapestry.internal.services.PageLoaderProcessor.loadPage(PageLoaderProcessor.java:392)
>         * 
> org.apache.tapestry.internal.services.PageLoaderImpl.loadPage(PageLoaderImpl.java:59)
>         * 
> org.apache.tapestry.internal.services.PagePoolImpl.checkout(PagePoolImpl.java:70)
>         * 
> org.apache.tapestry.internal.services.RequestPageCacheImpl.get(RequestPageCacheImpl.java:44)
>         * 
> org.apache.tapestry.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:55)
>         * 
> org.apache.tapestry.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:72)
>         * 
> org.apache.tapestry.services.TapestryModule$13.service(TapestryModule.java:1099)
>         * org.example.hilo.services.AppModule$1.service(AppModule.java:56)
>         ...

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