I have uploaded the real fix for review at
https://gwt-review.googlesource.com/#/c/12920.

It should fix your situation but  could you verify?

On Tue, Jun 9, 2015 at 10:08 AM, 'Chris DiGiano' via GWT Contributors <
[email protected]> wrote:

> Roberto, if it's any hint to the underlying problem: you're right that
> that the class is not reference anywhere else—it is used solely for the
> purpose of type coercion.
>
> Chris
>
> On Tue, Jun 9, 2015 at 10:48 AM 'Ray Cromwell' via GWT Contributors <
> [email protected]> wrote:
>
>> Chris,
>>   My change actually fixed a bug which may have obscured a problem. There
>> were duplicate class literals being generated. So you'd get
>> InterfaceFoo.class twice in the output, and it may be in SDM you'd be
>> covered, but in regular compiled mode you'd get the duplicates which were
>> causing closure compiler issues.
>>
>>  Roberto,  Maybe this is an issue with
>> ControlFlowRecorder/RapidTypeAnalyzer and interface literals?
>>
>>
>> On Tue, Jun 9, 2015 at 9:43 AM, 'Chris DiGiano' via GWT Contributors <
>> [email protected]> wrote:
>>
>>> @Ray, rolling back your change indeed fixed the problem (
>>> https://gwt-review.googlesource.com/#/c/12311/). How do you recommend
>>> we proceed? Anything I can do to help?
>>>
>>> @Roberto, thanks for your suggestion, but I had already tried restarting
>>> the code server and clearing the cache. This did not fix things.
>>>
>>> Chris
>>>
>>> On Mon, Jun 8, 2015 at 6:55 PM 'Roberto Lublinerman' via GWT
>>> Contributors <[email protected]> wrote:
>>>
>>>> This might be due to the way we handle class literals. Class literals
>>>> for interfaces if not referenced during the initial compile might cause
>>>> that error. The error should go aways if you restart SDM.
>>>>
>>>> The offending sequence is
>>>>
>>>> 0) Suppose initially you have (interface A, class B and class C) and
>>>> start SDM.
>>>> 1) Now edit class B to add a reference to A.class and recompile with
>>>> SDM (do not touch A at this time nor anything that makes it recompile) .
>>>> This should work fine because the literals that are referenced but whose
>>>> classes where not part of this compile will be generated in the epilogue.
>>>> 2) Now edit class C in any way that does not make B or A recompile.
>>>> Here you will have an error like the one you described.
>>>>
>>>> If you restart SDM at this point it should work.
>>>>
>>>> I'll get a fix for this tomorrow.
>>>>
>>>>
>>>>
>>>>
>>>> On Mon, Jun 8, 2015 at 3:23 PM, 'Ray Cromwell' via GWT Contributors <
>>>> [email protected]> wrote:
>>>>
>>>>> Ooops, wrong pointer (for external users) This one
>>>>> https://gwt-review.googlesource.com/#/c/12311/
>>>>>
>>>>>
>>>>> On Mon, Jun 8, 2015 at 3:14 PM, Ray Cromwell <[email protected]>
>>>>> wrote:
>>>>>
>>>>>> Try rolling back this CL and see if it fixes it (
>>>>>> https://critique.corp.google.com/#review/92873682/depot/google3/third_party/java_src/gwt/svn/trunk/dev/core/src/com/google/gwt/dev/jjs/impl/GenerateJavaScriptAST.java
>>>>>> )
>>>>>>
>>>>>>
>>>>>> On Mon, Jun 8, 2015 at 3:04 PM, Chris DiGiano <[email protected]>
>>>>>> wrote:
>>>>>>
>>>>>>> I'm having trouble referencing a JsType interface when running under
>>>>>>> superdevmode. I'm trying to pass the JsType as a class reference to a
>>>>>>> method that uses the class to coerce the results into the expected type:
>>>>>>>
>>>>>>>     myelement.getCustomStampedElement("dialog",
>>>>>>> PolymerDialog.class).open();
>>>>>>>
>>>>>>> Unfortunately, in superdevmode (and only in SDM) I get this error:
>>>>>>>
>>>>>>>     Uncaught ReferenceError:
>>>>>>> Lcom_google_ccc_groups_rosters_frontend_polymer_jstype_PolymerDialog_2_classLit_0_g$
>>>>>>> is not defined
>>>>>>>
>>>>>>> PolymerDialog is declared like this:
>>>>>>>
>>>>>>> @JsType
>>>>>>> public interface PolymerDialog {
>>>>>>>   void open();
>>>>>>> }
>>>>>>>
>>>>>>> and getCustomStampedElement is defined like this:
>>>>>>>
>>>>>>>     /**
>>>>>>>      * Returns the element specified in this custom element's
>>>>>>> template that matches the given id
>>>>>>>      * with the result coerced to a non-vanilla element type.
>>>>>>> Equivalent to Polymer's $ function.
>>>>>>>      *
>>>>>>>      * @see
>>>>>>>      *     <a href="
>>>>>>> https://www.polymer-project.org/1.0/docs/devguide/local-dom.html#node-finding
>>>>>>> ">
>>>>>>>      *     Polymer automatic node finding</a>
>>>>>>>      */
>>>>>>>     <T> T getCustomStampedElement(String id, Class<T> type);
>>>>>>>
>>>>>>> It appears that the PolymerDialog JsType is being left out of the
>>>>>>> list of class literals available in superdevmode. Is this a bug? Any 
>>>>>>> ideas
>>>>>>> for workarounds?
>>>>>>>
>>>>>>> Chris DiGiano
>>>>>>>
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