ADDITIONAL SYSTEM INFORMATION :
OS:
LSB Version: security-9.20170808ubuntu1-noarch
Distributor ID: Ubuntu
Description: Ubuntu 18.04.5 LTS
Release: 18.04
Codename: bionic

JDK：
openjdk version "19-ea" 2022-09-20
OpenJDK Runtime Environment (build 19-ea+31-2203)
OpenJDK 64-Bit Server VM (build 19-ea+31-2203, mixed mode, sharing)

openjdk version "20-ea" 2023-03-21
OpenJDK Runtime Environment (build 20-ea+6-304)
OpenJDK 64-Bit Server VM (build 20-ea+6-304, mixed mode, sharing)

A DESCRIPTION OF THE PROBLEM :
Hotspot JVM(JDK 19,20) fails to run this test case while Openj9 can pass. HotSpot JVM fails with the following message:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (generateOopMap.cpp:2159), pid=83663, tid=30199
# fatal error: Illegal class file encountered. Try running with -Xverify:all in method getAlphanumericCode
#
# JRE version: OpenJDK Runtime Environment (20.0+6) (build 20-ea+6-304)
# Java VM: OpenJDK 64-Bit Server VM (20-ea+6-304, interpreted mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x7fa1b5] GenerateOopMap::error_work(char const*, __va_list_tag*)+0x105
#
# No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /data/jit/fuzzJIT/hs_err_pid83663.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp

Note that:
The buggy classfile is bug_file/com/google/zxing/qrcode/encoder/Encoder.class
This buggy classfile is generated by fuzzer

ERROR MESSAGES/STACK TRACES THAT OCCUR :
#
# A fatal error has been detected by the Java Runtime Environment:
#
# Internal Error (generateOopMap.cpp:2159), pid=83663, tid=30199
# fatal error: Illegal class file encountered. Try running with -Xverify:all in method getAlphanumericCode
#
# JRE version: OpenJDK Runtime Environment (20.0+6) (build 20-ea+6-304)
# Java VM: OpenJDK 64-Bit Server VM (20-ea+6-304, interpreted mode, sharing, compressed oops, compressed class ptrs, g1 gc, linux-amd64)
# Problematic frame:
# V [libjvm.so+0x7fa1b5] GenerateOopMap::error_work(char const*, __va_list_tag*)+0x105
#
# No core dump will be written. Core dumps have been disabled. To enable core dumping, try "ulimit -c unlimited" before starting Java again
#
# An error report file with more information is saved as:
# /data/jit/fuzzJIT/hs_err_pid83663.log
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.Download bug_generateOopMap.zip from the following link:
https://drive.google.com/file/d/11uPuOHBNYAJU9g1TOumvt4USfJ6X9wmY/view?usp=sharing
2. Extract bug_generateOopMap.zip and enter bug_generateOopMap.
3. run the following command:
java -jar junit-platform-console-standalone-1.8.2.jar -cp ./util:./bug_file:./classes:./test-classes -m
 com.google.zxing.qrcode.encoder.EncoderTestCase#testChooseMode

ACTUAL -
If run the command:

java -jar junit-platform-console-standalone-1.8.2.jar -cp ./util:./bug_file:./classes:./test-classes -m
 com.google.zxing.qrcode.encoder.EncoderTestCase#testChooseMode

it crashes.
If run this command:

java -jar junit-platform-console-standalone-1.8.2.jar -cp ./classes:./test-classes -m com.google.zxing.qrcode.encoder.EncoderTestCase#testChooseMode

It passes. That is, remove the buggy classfile from classpath.

CUSTOMER SUBMITTED WORKAROUND :
run the following command:

java -jar junit-platform-console-standalone-1.8.2.jar -cp ./classes:./test-classes -m com.google.zxing.qrcode.encoder.EncoderTestCase#testChooseMode

FREQUENCY : always