[lworld] RFR: 8368875: [lworld] UseParallelGC fails null narrow klass assertion failure

[Coleen Phillimore]

On Fri, 3 Oct 2025 14:07:47 GMT, Coleen Phillimore <coleenp at openjdk.org> wrote:

> This seems to pass multiple stressHierarchy test invocations with -XX:+UseParallelGC, and runtime/valhalla/inlinetypes tests. I think there's probably further investigation that needs to be done but hopefully this helps with the parallel GC test failures.
> Testing with tier1-4.

Thanks for reviewing, Fred.  I think this will help with test results but still requires further research.

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PR Comment: https://git.openjdk.org/valhalla/pull/1655#issuecomment-3366962981