# SIGSEGV (0xb) at pc=0x00007f9e8a79b210, pid=6110, tid=6135
#
# JRE version: Java(TM) SE Runtime Environment (15.0) (fastdebug build 15-internal+0-2020-06-06-0625063.fairoz.matte.jdk)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 15-internal+0-2020-06-06-0625063.fairoz.matte.jdk, mixed mode, sharing, tiered, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x891210] ClassLoaderData::is_alive() const+0x0
#

--------------- T H R E A D ---------------

Current thread (0x00007f9e84300fa0): JavaThread "C1 CompilerThread0" daemon [_thread_in_vm, id=6135, stack(0x00007f9e5cb15000,0x00007f9e5cc16000)]


Current CompileTask:
C1: 168 38 ! 3 java.util.concurrent.ConcurrentHashMap::putVal (432 bytes)

Stack: [0x00007f9e5cb15000,0x00007f9e5cc16000], sp=0x00007f9e5cc13888, free space=1018k
Native frames: (J=compiled Java code, A=aot compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [libjvm.so+0x891210] ClassLoaderData::is_alive() const+0x0
V [libjvm.so+0x9a66ba] ClassHierarchyWalker::find_witness_anywhere(Klass*, bool, bool)+0x2ba
V [libjvm.so+0x9a72cd] Dependencies::find_unique_concrete_method(Klass*, Method*)+0xcd
V [libjvm.so+0x805e33] ciMethod::find_monomorphic_target(ciInstanceKlass*, ciInstanceKlass*, ciInstanceKlass*, bool)+0x3b3
V [libjvm.so+0x646735] GraphBuilder::invoke(Bytecodes::Code)+0x1155
V [libjvm.so+0x64728b] GraphBuilder::iterate_bytecodes_for_block(int)+0x73b
V [libjvm.so+0x648e09] GraphBuilder::iterate_all_blocks(bool)+0x89
V [libjvm.so+0x649edf] GraphBuilder::GraphBuilder(Compilation*, IRScope*)+0x46f
V [libjvm.so+0x65a94f] IR::IR(Compilation*, ciMethod*, int)+0x63f
V [libjvm.so+0x61bb11] Compilation::build_hir() [clone .part.0]+0x261
V [libjvm.so+0x62059c] Compilation::compile_java_method()+0x1bc
V [libjvm.so+0x6213a4] Compilation::compile_method()+0x1d4
V [libjvm.so+0x621d6a] Compilation::Compilation(AbstractCompiler*, ciEnv*, ciMethod*, int, BufferBlob*, DirectiveSet*)+0x32a
V [libjvm.so+0x622bd2] Compiler::compile_method(ciEnv*, ciMethod*, int, DirectiveSet*)+0x142
V [libjvm.so+0x910a1e] CompileBroker::invoke_compiler_on_method(CompileTask*)+0x45e
V [libjvm.so+0x9120b8] CompileBroker::compiler_thread_loop()+0x6b8