Do you mean that the class (or superclass) had a public void onModuleLoad() 
method but no implements EntryPoint?
I know that the mere presence of an onModuleLoad method (even a static one) 
was enough to turn any class into an entry point, and it's possible that it 
changed at some point; but that was never documented, so could hardly be 
considered a bug (this is an answer to Jens ;-) ).

Anyway, glad you figured it out.

On Monday, October 2, 2017 at 9:12:44 PM UTC+2, John Malpas wrote:
>
> I figured it out. The entry point class extended another class that 
> implemented EntryPoint, but did not explicitly say that it implemented 
> EntryPoint. This works fine in 2.6 but not in 2.8.
>
> On Sunday, October 1, 2017 at 9:16:55 PM UTC-7, John Malpas wrote:
>>
>> I have a fairy complex web application (What Grows Here) with maps etc 
>> that has been out for few years.
>>
>> I have been compiling it in GWT 2.6. It compiles and runs just fine in 
>> 2.6.
>> This week I have been trying to move a bunch of GWT apps to 2.8.
>> This one application compiles quietly in 2.8, but the sizes of all of the 
>> output files are much smaller than the output files produced by 2.6.
>> When I try to run it, nothing happens. I have deliberately simplified 
>> onModuleLoad() so that all that happens is an alert with a message,
>> but it will not even do that.
>>
>> Something is going wrong in the compile. I have compiled it with 
>> -logLevel TRACE, and compared the TRACE log with the TRACE produced by a 
>> 2.6 compile.
>> The two TRACE logs are very similar, until the very end, when it starts 
>> saying things like
>>     Adding '16' generated units
>>
>> In the 2.8 log, the counts of generated units are lower than in the 2.6 
>> log, and the sizes of the 2.8 output files are
>> much smaller than the sizes of the 2.6 files.
>>
>> Has anyone else encountered this behavior? What should I be looking for 
>> in the TRACE log for a clue
>> as to why the compile succeeds, but produces nonsense output?
>>
>> Thank you.
>>
>

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