RFR: 8365526: Crash with null Symbol passed to SystemDictionary::resolve_or_null [v5]

[David Holmes]

On Mon, 24 Nov 2025 20:33:31 GMT, Johan Sjölen <jsjolen at openjdk.org> wrote:

>> This was meant to comment your new code, not the old code... Same with the other comment.
>
> My bad, `put_when_absent` asserts that entry is absent.

That aside we are only calling `add_entry` when we have checked there is no existing entry.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28438#discussion_r2558218825