RFR: 8365891: failed: Completed task should not be in the queue

[Vladimir Kozlov]

On Thu, 21 Aug 2025 01:48:55 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Added missing `task->set_next(nullptr)` for "stale" tasks.
> 
> Testing: tier1-3,xcomp,stress

Thank you, Dean.

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PR Comment: https://git.openjdk.org/jdk/pull/26872#issuecomment-3211058473