Failed test: javax/management/mxbean/MXBeanNotifTest.java
Additional args: -XX:+UseZGC -XX:+UnlockExperimentalVMOptions -XX:+UseGraalJIT

...
# Internal Error (..src/hotspot/share/classfile/javaClasses.cpp:4781)...
# assert(oopDesc::is_oop(loader)) failed: loader must be oop

...
Current CompileTask:
C1:6604 2473 3 com.sun.tools.javac.jvm.Code::emitop0 (2595 bytes)

Stack: [0x0000ffff71b28000,0x0000ffff71d26000], sp=0x0000ffff71d22f10, free space=2027k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0xe7b848] java_lang_ClassLoader::loader_data_acquire(oop)+0x188 (javaClasses.cpp:4781)
V [libjvm.so+0x17babb4] SystemDictionary::find_instance_klass(Thread*, Symbol*, Handle)+0x74 (classLoaderData.inline.hpp:79)
V [libjvm.so+0x17bc040] SystemDictionary::find_constrained_instance_or_array_klass(Thread*, Symbol*, Handle)+0x20 (systemDictionary.cpp:1680)
V [libjvm.so+0x83e1b0] ciEnv::get_klass_by_name_impl(ciKlass*, constantPoolHandle const&, ciSymbol*, bool)+0x3d0 (ciEnv.cpp:470)
V [libjvm.so+0x83df24] ciEnv::get_klass_by_name_impl(ciKlass*, constantPoolHandle const&, ciSymbol*, bool)+0x144 (ciEnv.cpp:452)
V [libjvm.so+0x83e63c] ciEnv::get_klass_by_index_impl(constantPoolHandle const&, int, bool&, ciInstanceKlass*)+0xdc (ciEnv.cpp:556)
V [libjvm.so+0x84a084] ciField::ciField(ciInstanceKlass*, int, Bytecodes::Code)+0x2a4 (ciField.cpp:100)
V [libjvm.so+0x83d4ec] ciEnv::get_field_by_index_impl(ciInstanceKlass*, int, Bytecodes::Code)+0xbc (ciEnv.cpp:755)
V [libjvm.so+0x83f3c8] ciEnv::get_field_by_index(ciInstanceKlass*, int, Bytecodes::Code)+0xa0 (ciEnv.cpp:768)
V [libjvm.so+0x8a2fd4] ciBytecodeStream::get_field(bool&)+0x68 (ciStreams.cpp:310)
V [libjvm.so+0x6ca098] GraphBuilder::access_field(Bytecodes::Code)+0x38 (c1_GraphBuilder.cpp:1704)
V [libjvm.so+0x6cf344] GraphBuilder::iterate_bytecodes_for_block(int)+0xba4 (c1_GraphBuilder.cpp:2931)
V [libjvm.so+0x6d26c8] GraphBuilder::iterate_all_blocks(bool)+0x88 (c1_GraphBuilder.cpp:3019)
V [libjvm.so+0x6d3f64] GraphBuilder::GraphBuilder(Compilation*, IRScope*)+0x7e4 (c1_GraphBuilder.cpp:3390)
V [libjvm.so+0x6e333c] IRScope::IRScope(Compilation*, IRScope*, int, ciMethod*, int, bool)+0x37c (c1_IR.cpp:127)
V [libjvm.so+0x6e3528] IR::IR(Compilation*, ciMethod*, int)+0xa8 (c1_IR.cpp:273)
V [libjvm.so+0x6ab514] Compilation::build_hir() [clone .part.0]+0x16c (c1_Compilation.cpp:158)
V [libjvm.so+0x6ad330] Compilation::compile_java_method()+0x46c (c1_Compilation.cpp:380)
V [libjvm.so+0x6ad974] Compilation::compile_method()+0x224 (c1_Compilation.cpp:479)
V [libjvm.so+0x6adf74] Compilation::Compilation(AbstractCompiler*, ciEnv*, ciMethod*, int, BufferBlob*, bool, DirectiveSet*)+0x2ac (c1_Compilation.cpp:609)
V [libjvm.so+0x6afe60] Compiler::compile_method(ciEnv*, ciMethod*, int, bool, DirectiveSet*)+0x15c (c1_Compiler.cpp:262)
V [libjvm.so+0x993d78] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x9d4 (compileBroker.cpp:2325)
V [libjvm.so+0x994c38] CompileBroker::compiler_thread_loop()+0x638 (compileBroker.cpp:1969)
V [libjvm.so+0xe9ed08] JavaThread::thread_main_inner()+0x108 (javaThread.cpp:773)
V [libjvm.so+0x181592c] Thread::call_run()+0xac (thread.cpp:243)
V [libjvm.so+0x14f621c] thread_native_entry(Thread*)+0x12c (os_linux.cpp:868)
C [libpthread.so.0+0x7950] start_thread+0x190