RFR: JDK-8263557: Possible NULL dereference in Arena::destruct_contents()

[Thomas Stuefe]

On Mon, 15 Mar 2021 20:53:06 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

>> Sonarcloud reports a possible access to a NULL C++ object in Arena::destruct_contents():
>> 
>> _first->chop();
>> 
>> I have found no code path where this could happen but _first could conceivably be NULL after a call to Arena::reset(). Lets fix that.
>> 
>> GA test error on windows seems unrelated.
>
> Ok.

Thanks Coleen & Kim.

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PR: https://git.openjdk.java.net/jdk/pull/2994