RFR: 8343507: Parallel: Fail if verify_complete finds incorrect states [v2]

[Kim Barrett]

On Mon, 4 Nov 2024 07:55:04 GMT, Albert Mingkun Yang <ayang at openjdk.org> wrote:

>> Trivial change of replacing `log_warning` with `fatal`, because incorrect `destination_count` always indicate some problem.
>> 
>> Test: tier1-3
>
> Albert Mingkun Yang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   review

Looks good.

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Marked as reviewed by kbarrett (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/21865#pullrequestreview-2412532188