[jira] Commented: (JANINO-31) IncompatibleClassChangeError when loading nested classes

    [ http://jira.codehaus.org/browse/JANINO-31?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=179522#action_179522 ]

Matt Fowles commented on JANINO-31:
-----------------------------------

You can find a fixed version of this at http://code.google.com/p/janino-streambase/

I did not test this on jrockit; however, I did run it through StreamBase's nightly tests in addition to the ones provided by Janino.

> IncompatibleClassChangeError when loading nested classes
> --------------------------------------------------------
>
>                 Key: JANINO-31
>                 URL: http://jira.codehaus.org/browse/JANINO-31
>             Project: Janino
>          Issue Type: Bug
>         Environment: BEA jrockit81sp3_142_04
> Janino 2.3.7
>            Reporter: kdx
>            Assignee: Arno Unkrig
>            Priority: Critical
>         Attachments: atd.patch, ExecutableStmt.java, janinoc-incompatibleclasschangeerror-testcase.zip
>
>
> Such a class:
> public class Function_0 {
>     public static class PrintX {
>         public static void printX() {
>             System.err.println("x");
>         }
>     }
> }
> when compiled by Janino and the resulting class files loaded via the ByteArrayClassLoader like this:
> ByteArrayClassLoader bacl = new ByteArrayClassLoader(classes, parent);
> Class clazz = bacl.loadClass(classNames[0]);
> System.err.println(clazz.getDeclaredClasses());
> results in a verification error on BEA's jrockit81sp3_142_04 JVM:
> java.lang.IncompatibleClassChangeError: Function_0$PrintX
> at java.lang.Class.getDeclaredClasses0(I)[Ljava.lang.Class;(Unknown Source)
> at java.lang.Class.getDeclaredClasses(I)[Ljava.lang.Class;(Unknown Source)
> at Main.main([Ljava.lang.String;)V(Main.java:45)
> And seems to work fine on Sun's j2sdk1.4.2_04:
> [Ljava.lang.Class;@206c555
> BEA's website claims that JRockit performs stricter type checks than Sun's JVM, see "Why is JRockit throwing a ClassFormatError, IncompatibleClassChangeError or other LinkageError exceptions when the Sun JVM is not?" at http://e-docs.bea.com/wljrockit/docs81/dev_faq.html
> The attached source, when compiled by Sun's j2sdk1.4.2_04, runs fine both on the Sun j2sdk1.4.2_04 and BEA jrockit81sp3_142_04 JVMs.  When compiled by Janino 2.3.7, it runs fine on the Sun j2sdk1.4.2_04 JVM, but not, as said above, on BEA jrockit81sp3_142_04.
> To verify that it is only the nested classes that cause the problem, the Main.class may be overwritten with a Sun-compiled version (while keeping the Function_0*.class files Janino-compiled) and the IncompatibleClassChangeError still happens.

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