On Tue, 5 Nov 2024 18:29:52 GMT, Chen Liang <li...@openjdk.org> wrote:

> After the ClassFile API migration, when serializable lambdas are requested 
> for hidden class callers, illegal class name is generated for the 
> serialization methods, which previously had legal yet unusable class names, 
> as hidden classes cannot be described by a `CONSTANT_Class_info`.
> 
> This patch restores a similar older behavior of using legal yet unusable 
> class names.  Previously, the invalid `.` in hidden class names was replaced 
> by a `/` as if a package separator; this patch changes it to a `_` like that 
> in the generated lambda's class name.
> 
> The bug report shows some unintended and erroneous usages of 
> `LambdaMetafactory`.  To clarify and to persuade against misuse, I added a 
> paragraph of API notes to `LambdaMetafactory`, describing the impact of this 
> API being designed to support Java language features.  In particular, I used 
> the scenario where people assumed LMf generates weak hidden classes, which 
> happened in this issue report and in #12493, that misuse can lead to resource 
> leaks.

Is it possible to add a test for this?

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PR Comment: https://git.openjdk.org/jdk/pull/21912#issuecomment-2457907971

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