RFR: 8323820: [MacOS] build failure: non-void function does not return a value [v2]

[Aleksey Shipilev]

On Tue, 16 Jan 2024 18:47:33 GMT, Joshua Cao <duke at openjdk.org> wrote:

>> I can't reproduce the issue since I don't have the right build setup. But hopefully this change is trivial enough to fix the error.
>
> Joshua Cao has updated the pull request incrementally with one additional commit since the last revision:
> 
>   ShouldNotReachHere() -> fatal()

Marked as reviewed by shade (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/17449#pullrequestreview-1824820821