If I update JDK with the latest Graal, I get this crash, and it is reproducible:

# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error[0.382s][info][class,load] java.util.concurrent.ConcurrentHashMap$CollectionView source: shared objects file
 (open/src/hotspot/share/oops/instanceKlass.cpp:3610), pid=15270, tid=15283
# guarantee(length == methods()->length()) failed: invalid method ordering length
#
# JRE version: Java(TM) SE Runtime Environment (14.0) (fastdebug build 14-internal+0-2019-10-04-1908127.dean.long.dev0)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (fastdebug 14-internal+0-2019-10-04-1908127.dean.long.dev0, mixed mode, sharing, tiered, jvmci, jvmci compiler, compressed oops, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0xdd4c74] InstanceKlass::verify_on(outputStream*)+0x844