RFR: 8327000: GenShen: Integrate updated Shenandoah implementation of FreeSet into GenShen [v8]

[Kelvin Nilsen]

On Tue, 18 Jun 2024 15:41:41 GMT, Kelvin Nilsen <kdnilsen at openjdk.org> wrote:

>> Looks like this is something special about full gc.  The call to make_young_maybe() only occurs when !_is_generational().  kind of a peculiar name for this function, given that we're non-generational here.  Still exploring.
>
> That code should not even be reached.  I'm testing a change here.

Have replace this code with an assert.  Thanks for catching the inconsistency.

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PR Review Comment: https://git.openjdk.org/shenandoah/pull/440#discussion_r1644825633