[jboss-jira] [JBoss JIRA] (JASSIST-149) ClassFormatError when using an ExprEditor, replacing a MethodCall after using insertBefore in a FieldAccess

[Shigeru Chiba (JIRA)]

     [ https://issues.jboss.org/browse/JASSIST-149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Shigeru Chiba resolved JASSIST-149.
-----------------------------------

    Fix Version/s: 3.16.0-GA
       Resolution: Done

    
> ClassFormatError when using an ExprEditor, replacing a MethodCall after using insertBefore in a FieldAccess
> -----------------------------------------------------------------------------------------------------------
>
>                 Key: JASSIST-149
>                 URL: https://issues.jboss.org/browse/JASSIST-149
>             Project: Javassist
>          Issue Type: Bug
>    Affects Versions: 3.15.0-GA
>         Environment: JRE 1.6
>            Reporter: Ben Romberg
>            Assignee: Shigeru Chiba
>             Fix For: 3.16.0-GA
>
>
> To reproduce, use the following ExprEditor:
> new ExprEditor() {
>   edit(FieldAccess fieldAccess) {
>     behavior.insertBefore(...);
>   }
>   edit(MethodCall methodCall) {
>     methodCall.replace(...);
>   }
> }
> Now, use the ExprEditor on a method assigning a field first and then calling a method. When loading the modified class, the following exception should occur:
> java.lang.ClassFormatError: Invalid pc in LineNumberTable in class file de/andrena/next/systemtest/pure/PureOnlyForOwnMethodsFieldsAndParametersSystemTest$TargetClass
> 	at java.lang.ClassLoader.defineClass1(Native Method)
> 	at java.lang.ClassLoader.defineClassCond(ClassLoader.java:632)
> 	at java.lang.ClassLoader.defineClass(ClassLoader.java:616)
> 	at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:141)
> 	at java.net.URLClassLoader.defineClass(URLClassLoader.java:283)
> 	at java.net.URLClassLoader.access$000(URLClassLoader.java:58)
> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:197)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:248)
> 	at java.lang.Class.getDeclaredFields0(Native Method)
> 	at java.lang.Class.privateGetDeclaredFields(Class.java:2291)
> 	at java.lang.Class.getDeclaredFields(Class.java:1743)
> ...
> Expected behavior:
> * Either correctly replacing the methodCall without corrupting the line-number-table, or
> * throwing a CannotCompileException when trying to insertBefore within an ExprEditor.

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