Segfault in ClassListParser::resolve_indy dumping static AppCDS archive

Gunnar Morling reports this regression in JDK 16:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x0000000109cdcc9c, pid=6375, tid=7427
#
# JRE version: OpenJDK Runtime Environment (16.0+27) (build 16-ea+27-1884)
# Java VM: OpenJDK 64-Bit Server VM (16-ea+27-1884, interpreted mode, tiered, compressed oops, g1 gc, bsd-amd64)
# Problematic frame:
# V [libjvm.dylib+0x2dcc9c] ClassListParser::resolve_indy(Symbol*, Thread*)+0xcc
#

https://github.com/gunnarmorling/quarkus-cds#reproducer-for-seg-fault-with-jdk-16

---

git clone https://github.com/gunnarmorling/quarkus-cds.git
cd quarkus-cds/quarkus-cds
export JAVA_HOME=<recent JDK 16>
export PATH=$JAVA_HOME/bin:$PATH
mvn clean verify -DskipTests=true -DskipITs=true

java --version
openjdk 16-ea 2021-03-16
OpenJDK Runtime Environment (build 16-ea+27-1884)
OpenJDK 64-Bit Server VM (build 16-ea+27-1884, mixed mode, sharing)

Create the runtime image:

$JAVA_HOME/bin/jlink --add-modules java.base,java.compiler,java.instrument,java.naming,java.rmi,java.security.jgss,java.security.sasl,java.sql,jdk.jconsole,jdk.unsupported \
  --output target/runtime-image

mkdir target/runtime-image/cds

Create the class list file:

./target/runtime-image/bin/java -XX:DumpLoadedClassList=target/todo-manager-classlist.lst \
  -jar target/todo-manager-1.0.0-SNAPSHOT-runner.jar

The above command starts a quarkus command. Let it run through initialization, then terminate it (Ctrl + C)

Observe the seg fault when running the following:

./target/runtime-image/bin/java -Xshare:dump \
  -XX:SharedClassListFile=target/todo-manager-classlist.lst \
  -XX:SharedArchiveFile=target/runtime-image/cds/app-cds.jsa \
  -jar target/todo-manager-1.0.0-SNAPSHOT-runner.jar