RFR: 8347562: javac crash due to type vars in permits clause [v3]

[Hannes Greule]

On Tue, 14 Jan 2025 07:09:26 GMT, Hannes Greule <hgreule at openjdk.org> wrote:

>> This fix ignores erroneous types when attributing permits clauses. Before, multiple erroneous types would lead to an exception in the duplication check. Additionally, such types would cause package mismatch errors. As javac already reports errors before, such an additional error is more confusing than helpful.
>> 
>> Note that there are additional type var checks, but those only apply if the type vars come from a type other than the type with the permits clause, i.e. an enclosing class.
>
> Hannes Greule has updated the pull request incrementally with one additional commit since the last revision:
> 
>   update copyright year

Thank you for your review!

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PR Comment: https://git.openjdk.org/jdk/pull/23069#issuecomment-2592563683