This may be related to the other subtask (regarding the parent class of a primitive object), but a simple test caused a java.lang.BootstrapMethodError on bootstrapping .equals():

primitive record SimpleRecordPrimitive(int theInteger, String theString) { }

public final class PrimitiveRecordEquals {

    public static void main(String[] args) {

        if (! new SimpleRecordPrimitive(42, "Fortytwo").equals(new SimpleRecordPrimitive(42, "Fortytwo"))) {
            throw new AssertionError("Records should be equal");
        }
    }
}

-----------

The exact error is java.lang.BootstrapMethodError: bootstrap method initialization exception
at java.base/java.lang.invoke.BootstrapMethodInvoker.invoke(BootstrapMethodInvoker.java:188)
at java.base/java.lang.invoke.CallSite.makeSite(CallSite.java:315)
at java.base/java.lang.invoke.MethodHandleNatives.linkCallSiteImpl(MethodHandleNatives.java:281)
at java.base/java.lang.invoke.MethodHandleNatives.linkCallSite(MethodHandleNatives.java:271)
at SimpleRecordPrimitive.equals(PrimitiveRecordEquals.java:32)
at PrimitiveRecordEquals.main(PrimitiveRecordEquals.java:38)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:569)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:833)
Caused by: java.lang.IllegalArgumentException: Bad method type: (SimpleRecordPrimitive,Object)boolean
at java.base/java.lang.runtime.ObjectMethods.bootstrap(ObjectMethods.java:345)
at java.base/java.lang.invoke.BootstrapMethodInvoker.invoke(BootstrapMethodInvoker.java:168)
... 11 more

I'll investigate and propose a fix.