RFR: 8373411: Crash when PrintSharedArchiveAndExit is enabled but shared heap is disabled [v2]

[Ioi Lam]

On Thu, 11 Dec 2025 09:46:19 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Found this while poking around at Valhalla that turned off heap sharing. The fix is simple, there's a missing HeapShared::is_loading() check that we missed when refactoring the object streaming code.
>
> Stefan Karlsson has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Review

Marked as reviewed by iklam (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/28741#pullrequestreview-3567786368