Eirik Bakke created NETBEANS-455:
------------------------------------

             Summary: "The bytes do not represent a valid class" error while 
invoking the "Apply Code Changes" action
                 Key: NETBEANS-455
                 URL: https://issues.apache.org/jira/browse/NETBEANS-455
             Project: NetBeans
          Issue Type: Bug
          Components: debugger - Java, java - Classfile
    Affects Versions: 9.0
         Environment: Apache NetBeans IDE Dev (Build 
incubator-netbeans-release-205-on-20180202) on OpenJDK 64-Bit Server VM 
9.0.4.1+11, Mac OS X version 10.9.5 running on x86_64; UTF-8; en_US (nb)
            Reporter: Eirik Bakke


I got the following exception while invoking the "Apply Code Changes" action in 
the Java debugger:

{noformat}
INFO [org.netbeans.modules.maven.debug.DebuggerChecker]: The bytes do not 
represent a valid class. class not in class file format
java.lang.ClassFormatError: class not in class file format
        at 
jdk.jdi/com.sun.tools.jdi.VirtualMachineImpl.redefineClasses(VirtualMachineImpl.java:332)
        at 
org.netbeans.modules.debugger.jpda.jdi.VirtualMachineWrapper.redefineClasses(VirtualMachineWrapper.java:3138)
        at 
org.netbeans.modules.debugger.jpda.JPDADebuggerImpl.fixClasses(JPDADebuggerImpl.java:471)
[catch] at 
org.netbeans.modules.maven.debug.DebuggerChecker.reload(DebuggerChecker.java:401)
        at 
org.netbeans.modules.maven.debug.DebuggerChecker.doReload(DebuggerChecker.java:206)
        at 
org.netbeans.modules.maven.debug.DebuggerChecker.checkRunConfig(DebuggerChecker.java:145)
        at 
org.netbeans.modules.maven.execute.PrereqCheckerMerger$Impl.checkRunConfig(PrereqCheckerMerger.java:64)
        at org.netbeans.modules.maven.api.execute.RunUtils.run(RunUtils.java:65)
        at 
org.netbeans.modules.maven.ActionProviderImpl.invokeAction(ActionProviderImpl.java:262)
        at 
org.netbeans.modules.maven.ActionProviderImpl.access$000(ActionProviderImpl.java:111)
        at 
org.netbeans.modules.maven.ActionProviderImpl$1.run(ActionProviderImpl.java:235)
        at 
org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1418)
        at 
org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:45)
        at org.openide.util.lookup.Lookups.executeWith(Lookups.java:278)
        at 
org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2033)
{noformat}

This is a Maven-based NetBeans Platform module project. The module project is 
using JDK8 while the IDE is running on JDK9.

Reporting this as a new JIRA issue since the old NetBeans exception reporter no 
longer seems to be in use.



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