RFR: 8232765: NullPointerException at Types.eraseNotNeeded() when compiling a class [v4]

[Maurizio Cimadamore]

On Sun, 25 Apr 2021 08:14:46 GMT, Guoxiong Li <gli at openjdk.org> wrote:

>> Hi all,
>> 
>> The method `types::asSuper` may return `null` so that `types.erasure(types.asSuper(iterator.type.getReturnType(), syms.iteratorType.tsym))` throws `NPE`.
>> 
>> This patch sets the return type and outputs the corresponding error message if `types::asSuper` returns `null`.
>> 
>> Thank you for taking the time to review.
>> 
>> Best Regards.
>
> Guoxiong Li has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Revert copyright.

Thanks for the stress test - looks good.

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Marked as reviewed by mcimadamore (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/2099