Oops are accessed in the blocked state:

V [libjvm.so+0x32616c] AccessInternal::check_access_thread_state()+0xbc
V [libjvm.so+0x135d565] VThreadList::find(oop) const+0x35
V [libjvm.so+0x135e208] JvmtiVTSuspender::is_vthread_suspended(oop)+0x78
V [libjvm.so+0x1312997] JvmtiExport::check_suspend_at_safepoint(JavaThread*)+0x167
V [libjvm.so+0xfa3a28] InterpreterRuntime::at_safepoint(JavaThread*)+0xe8
j java.util.concurrent.SynchronousQueue$TransferStack.transfer(Ljava/lang/Object;ZJ)Ljava/lang/Object;+120 java.base@19-internal

allowing safepoints to invalidate the oops while they are accessed.

Found with extra checks in the Access API, while running GetSetLocalTest.