BeanEditForm loses object found by onPrepare() during render
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                 Key: TAP5-1527
                 URL: https://issues.apache.org/jira/browse/TAP5-1527
             Project: Tapestry 5
          Issue Type: Bug
          Components: tapestry-core
    Affects Versions: 5.2.5
            Reporter: Geoff Callender
            Priority: Critical


Was fine in 5.1.0.5, discovered when upgrading to 5.2.5.

Using a BeanEditForm to edit an object: onPrepare() is being called twice (!) 
during the render phase, and then the object found in onPrepare() disappears!

        http://jumpstart.doublenegative.com.au/jumpstart/examples/input/edit1/1

Yet, when you replace BeanEditForm with a Form around a BeanEditor, everything 
works correctly: onPrepare() is called once during the render phase and the 
object doesn't disappear:

        
http://jumpstart.doublenegative.com.au/jumpstart/examples/input/morecontroledit1/1

You can see the java code is almost identical in the two examples but the 
result is different.

For more discussion see 
http://tapestry.1045711.n5.nabble.com/BeanEditForm-What-s-happening-to-my-object-parameter-tt4257173.html#none
 .

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