JDK 13 RFR of JDK-8224177: Harden annotation processing framework to irregular behavior from processors

[Joseph D. Darcy]

Hello,

Updated with test cases so that CheckExamples.java will pass for the new 
messages:

     http://cr.openjdk.java.net/~darcy/8224177.1

Thanks,

-Joe

On 5/19/2019 11:36 PM, Joe Darcy wrote:
> Hello,
>
> As a complement to the changes in AbstractProcessor done under 
> JDK-8146726 , the annotation processing framework in javac could be 
> hardened against various kinds of irregular results returned from 
> processors. The hardening can include just warning about redundant but 
> not strictly incorrect information.
>
> Webrev at:
>
>     http://cr.openjdk.java.net/~darcy/8224177.0/
>
> Most of the code changes in JavacProcessingEnvironment are to guard 
> against misbehaving Set implementations returned from Processors; 
> perhaps this is an unnecessary degree of caution.
>
> There may be other test updates needed for account for the new 
> warnings messages; I'll make any such update once there is review 
> feedback and agreement on (what subset of) this change's checks should 
> go back.
>
> Thanks,
>
> -Joe
>