Field inheritance for value classes is causing several issues to C2.
For instance:

public class AbstractCircularity {
    static abstract value class AbstractBadField {
	     ConcreteBadField f = new ConcreteBadField();
    }

    static value class ConcreteBadField extends AbstractBadField {
	     int i  = 0;
    }

    public static void main(String[] args) {
	     var c = new ConcreteBadField();
    }
}

Run with -Xcomp  -XX:-TieredCompilation, this program causes an assertion failure in CI:

#  Internal Error (valhalla/open/src/hotspot/share/ci/ciInlineKlass.cpp:33), pid=648122, tid=648136
#  assert(super() == nullptr || !super()->has_nonstatic_fields()) failed: an inline type must not inherit fields from its superclass
#
# JRE version: Java(TM) SE Runtime Environment (23.0) (fastdebug build 23-lworld5ea-2024-05-08-1319037.fred...)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 23-lworld5ea-2024-05-08-1319037.fred..., compiled mode, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V  [libjvm.so+0x90a087]  ciInlineKlass::compute_nonstatic_fields()+0x207

This issue might be common to C1 and C2 as they share the CI implementation.

Trying to remove this assert causes C2 to crash on the following assert:

#  Internal Error (valhalla/open/src/hotspot/share/opto/parse3.cpp:238), pid=703047, tid=703061
#  assert(obj->as_InlineType()->is_larval()) failed: must be larval
#
# JRE version: Java(TM) SE Runtime Environment (23.0) (fastdebug build 23-lworld5ea-2024-05-08-1319037.fred...)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 23-lworld5ea-2024-05-08-1319037.fred..., compiled mode, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V  [libjvm.so+0x15d00d2]  Parse::do_put_xxx(Node*, ciField*, bool)+0xb12

Note that this particular test program is triggering an infinite recursion between the constructors of the two value classes, leading to a SOE, but the VM should not crash.