[jboss-jira] [JBoss JIRA] (JASSIST-248) Constant pool index 268 is invalid

Constant pool index 268 is invalid ---------------------------------- Key: JASSIST-248 URL: https://issues.jboss.org/browse/JASSIST-248 Project: Javassist Issue Type: Bug Affects Versions: 3.19.0-GA Reporter: Laurent Pellegrino Assignee: Shigeru Chiba Labels: regression Fix For: 3.21.0-GA Attachments: _StubLinkedList.class We are using Javassist for one of our open source projects since about 10 years. Recently, I have tried to upgrade to version 3.19 and 3.20. Unfortunately, with both versions, generated byte code seems to cause errors with the JVM. Below is the output: {code} Exception in thread "RestartDownNodesPolicy node status check" java.lang.VerifyError: Illegal type at constant pool entry 268 in class pa.stub.java.util._StubLinkedList Exception Details: Location: pa/stub/java/util/_StubLinkedList.replaceAll(Ljava/util/function/UnaryOperator;)V @43: invokespecial Reason: Constant pool index 268 is invalid Bytecode: 0x0000000: 2ab4 00cc 9900 252a b400 0db2 002c 100b 0x0000010: 32c0 0028 04bd 00ce 5903 2b53 b200 26b8 0x0000020: 00d7 b900 dd02 0057 b12a 2bb7 010c b1 Stackmap Table: same_frame(@41) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:264) at org.objectweb.proactive.core.mop.MOP.forName(MOP.java:155) at org.objectweb.proactive.core.mop.MOP.findStubConstructor(MOP.java:649) at org.objectweb.proactive.core.mop.MOP.createStubObject(MOP.java:822) at org.objectweb.proactive.core.mop.MOP.newInstance(MOP.java:338) at org.objectweb.proactive.core.mop.MOP.newInstance(MOP.java:196) at org.objectweb.proactive.core.body.proxy.AbstractBodyProxy.reifyAsAsynchronous(AbstractBodyProxy.java:277) at org.objectweb.proactive.core.body.proxy.AbstractBodyProxy.invokeOnBody(AbstractBodyProxy.java:154) at org.objectweb.proactive.core.body.proxy.AbstractBodyProxy.reify(AbstractBodyProxy.java:123) at pa.stub.org.ow2.proactive.resourcemanager.nodesource._StubNodeSource.getDownNodes(_StubNodeSource.java) at org.ow2.proactive.resourcemanager.nodesource.policy.RestartDownNodesPolicy$1.run(RestartDownNodesPolicy.java:92) at java.util.TimerThread.mainLoop(Timer.java:555) at java.util.TimerThread.run(Timer.java:505) {code} The issue seems related to default methods introduced in Java 8. Perhaps its not an issue with Javassist but to be honest I don't understand the exception. However, I have noticed that using Javassist in version 3.18.2 solves the problem.