With the patch for JDK-8271959, some of the java/foreign/ tests fail with:

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (/oracle/valhalla3/open/src/hotspot/share/opto/loopnode.cpp:5343), pid=651209, tid=651245
# assert(false) failed: Bad graph detected in build_loop_late
#
# JRE version: Java(TM) SE Runtime Environment (18.0) (fastdebug build 18-lworld3ea+0-2021-07-08-0750194.tobias...)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 18-lworld3ea+0-2021-07-08-0750194.tobias..., mixed mode, sharing, tiered, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x138f93b] PhaseIdealLoop::build_loop_late_post_work(Node*, bool)+0x18b
#
# Core dump will be written. Default location: Core dumps may be processed with "/usr/share/apport/apport %p %s %c %d %P %E" (or dumping to /oracle/valhalla3/JTwork/scratch/core.651209)
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

Current CompileTask:
C2: 8110 4560 4 java.lang.invoke.LambdaFormEditor::bindArgumentForm (269 bytes)

Stack: [0x00007f0dc1eff000,0x00007f0dc2000000], sp=0x00007f0dc1ffa1f0, free space=1004k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x138f93b] PhaseIdealLoop::build_loop_late_post_work(Node*, bool)+0x18b
V [libjvm.so+0x138ff5a] PhaseIdealLoop::build_loop_late(VectorSet&, Node_List&, Node_Stack&)+0xba
V [libjvm.so+0x13908c7] PhaseIdealLoop::build_and_optimize(LoopOptsMode)+0x507
V [libjvm.so+0xa5a257] PhaseIdealLoop::optimize(PhaseIterGVN&, LoopOptsMode)+0x287
V [libjvm.so+0xa56be4] Compile::Optimize()+0x1434
V [libjvm.so+0xa58830] Compile::Compile(ciEnv*, ciMethod*, int, bool, bool, bool, bool, bool, DirectiveSet*)+0x1630
V [libjvm.so+0x841d80] C2Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x6a0
V [libjvm.so+0xa686d1] CompileBroker::invoke_compiler_on_method(CompileTask*)+0xb71
V [libjvm.so+0xa69368] CompileBroker::compiler_thread_loop()+0x598
V [libjvm.so+0x196991c] JavaThread::thread_main_inner()+0x27c
V [libjvm.so+0x196ff60] Thread::call_run()+0x100
V [libjvm.so+0x16205b4] thread_native_entry(Thread*)+0x104