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

[Coleen Phillimore]

On Tue, 25 Nov 2025 01:25:59 GMT, David Holmes <dholmes at openjdk.org> wrote:

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

Now also an assert that we really are adding an entry when we've checked that there is no existing entry.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28438#discussion_r2561526309