RFR: 8355230: Crash in fuzzer tests: assert(n != nullptr) failed: must not be null [v2]

[Tobias Hartmann]

On Tue, 20 May 2025 12:02:14 GMT, Roland Westrelin <roland at openjdk.org> wrote:

>> During IGVN, `TypeNode::make_paths_from_here_dead()` follows data
>> nodes until a `Phi`. The `Region` input for the input that that logic
>> goes through to reach the `Phi` is `null` causing the crash. I propose
>> simply adding an extra check for that corner case.
>
> Roland Westrelin has updated the pull request incrementally with two additional commits since the last revision:
> 
>  - test comment
>  - test cleanup

Thanks for improving the test. Still looks good to me. Ship it! :)

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Marked as reviewed by thartmann (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25268#pullrequestreview-2854266264