RFR: JDK-8263558: Possible NULL dereference in fast path arena free if ZapResourceArea is true [v4]

[Thomas Stuefe]

On Mon, 15 Mar 2021 20:32:25 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Thomas Stuefe has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   just the assert
>
> Looks good.

Thanks @coleenp and @kimbarrett . However, as I feared, with the assert alone I now see it firing both in our nightlies at SAP and in the GAs in compiler tests. 

Which is cool in a way since this is the first time SonarCloud reported anything demonstrably real.:) I'll take a look at the crashes and modify the patch.

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PR: https://git.openjdk.java.net/jdk/pull/2995