A bug was recently discovered in JVMCI-8. As part of the fix, a new JVMCI test was added:

https://github.com/graalvm/graal-jvmci-8/commit/e1059ebde2c89af665ef79973f57e80f2eb01596

While the bug never existed in JDK 11 or later, adding the test would be a good idea to ensure such a bug cannot occur.

The test is attached to this issue in a format that should "just work" with JDK 15.