Just following up on this. It turns out the problem was that I have some
native javascript that builds some elements after the page loads and these
elements are referenced in the gwt (that's where the null panel was showing
up). Even though this panel is referenced in a deferred block the page may
still take longer to load than that and the elements aren't yet created.
I tried fixing this by dynamically loading the gwt nocache file in my
native javascript with something like this:
var gwt = document.createElement("script");
gwt.setAttribute("type", "text/javascript");
gwt.setAttribute("src", "gwt/gwt.nocache.js");
document.body.appendChild(gwt);
But either the browser or gwt didn't like it (I got various errors that I
couldn't figure out).
So, I ended up creating a timer that keeps checking the availability of
that panel and only proceeds after it's been created. Seems strange I
can't control when the GWT files get loaded, but this will work as a backup.
Thanks again for the help!
On Sat, Jan 17, 2015 at 5:54 PM, Robert J. Carr <rjc...@gmail.com> wrote:
> Thanks, true I guess, I'll try to sort it out. I was able to use the
> throttling to reproduce the problem as you suggested so thanks!
> Unfortunately dev mode isn't working for me so now I have to go figure out
> super dev mode I guess.
>
> Thanks again for the help. You certainly gave me a start!
>
> On Saturday, January 17, 2015, Jens <jens.nehlme...@gmail.com> wrote:
>
>> If the code is dereferencing null it should always be an error, right?
>>>
>>
>> Not really. Maybe a field becomes null while a server request is in
>> progress and when the request finishes the onSuccess callback tries to use
>> that field without any checks.
>>
>> -- J.
>>
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