RFR: 8372047: ClassTransform.transformingMethodBodies andThen composes incorrectly [v2]

[Chen Liang]

On Wed, 19 Nov 2025 07:40:10 GMT, Adam Sotona <asotona at openjdk.org> wrote:

>> Chen Liang has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains one new commit since the last revision:
>> 
>>   8372047: ClassTransform.transformingMethodBodies andThen composes incorrectly
>
> src/java.base/share/classes/jdk/internal/classfile/impl/TransformImpl.java line 123:
> 
>> 121:         @Override
>> 122:         public ClassTransform andThen(ClassTransform next) {
>> 123:             if (next instanceof ClassMethodTransform(var nextTransform, var nextFilter) && filter == nextFilter)
> 
> I'm trying to figure out a case where filters of the chained transforms are identical.
> Is it covered by some tests?
> Unless there is a real benefit in a frequent use case I suggest to remove this optimization.

This is only intended for the no-filter transform, which uses the same stateless lambda.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28377#discussion_r2542016226