RFR: 8366488: JVM_FindClassFromClass should assert that from class is never null [v2]

[Paul Hübner]

On Tue, 28 Oct 2025 09:23:03 GMT, David Holmes <dholmes at openjdk.org> wrote:

>> Or have both asserts, from_class_oop is non-null and also from_class_oop->_klass is non-null.
>
> Yep Coleen is right. I totally misread the issue - `from` is what is not null, and hence `from_class` cannot be null.

I've changed it and reran through tier1.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27957#discussion_r2469682331