Looks like a regression from JDK-8377803.

java -Xbatch --enable-preview -XX:-TieredCompilation -XX:CompileCommand=compileonly,Test::test Test.java

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/open/src/hotspot/share/opto/parse1.cpp:1871), pid=3621752, tid=3621769
# assert(_gvn.type(n) == TypePtr::NULL_PTR) failed: must be a null constant
#
# JRE version: Java(TM) SE Runtime Environment (27.0+1) (fastdebug build 27-valhalla+1-168)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 27-valhalla+1-168, mixed mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x195996a] Parse::merge_common(Parse::Block*, int)+0x178a
#

Current CompileTask:
C2:1368 106 b Test::test (48 bytes)

Stack: [0x00007feb533a7000,0x00007feb534a7000], sp=0x00007feb534a34d0, free space=1009k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x195996a] Parse::merge_common(Parse::Block*, int)+0x178a (parse1.cpp:1871)
V [libjvm.so+0x195b640] Parse::do_all_blocks()+0x130
V [libjvm.so+0x195ede4] Parse::Parse(JVMState*, ciMethod*, float)+0xac4
V [libjvm.so+0xa13e85] ParseGenerator::generate(JVMState*)+0x135
V [libjvm.so+0xc23355] Compile::Compile(ciEnv*, ciMethod*, int, Options, DirectiveSet*)+0x15e5
V [libjvm.so+0xa10988] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x4b8
V [libjvm.so+0xc3384f] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xbcf
V [libjvm.so+0xc34a90] CompileBroker::compiler_thread_loop()+0x530
V [libjvm.so+0x120482b] JavaThread::thread_main_inner()+0x13b
V [libjvm.so+0x1cf1816] Thread::call_run()+0xb6
V [libjvm.so+0x19060b8] thread_native_entry(Thread*)+0x118