[jira] [Updated] (GROOVY-7016) AutoClone does not check for existing copy constructor

["Eric Milles (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/GROOVY-7016?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Eric Milles updated GROOVY-7016:
--------------------------------
    Labels: ClassFormatError  (was: )

> AutoClone does not check for existing copy constructor
> ------------------------------------------------------
>
>                 Key: GROOVY-7016
>                 URL: https://issues.apache.org/jira/browse/GROOVY-7016
>             Project: Groovy
>          Issue Type: Bug
>          Components: groovy-jdk
>    Affects Versions: 2.4.0-beta-2
>            Reporter: Venkat Srinivasan
>            Assignee: Paul King
>            Priority: Minor
>              Labels: ClassFormatError
>             Fix For: 2.3.7, 2.4.0-beta-3
>
>
> @AutoClone with COPY_CONSTRUCTOR style does not check if a copy constructor already exists. There are times when the author may want to write their own copy constructor.
> Please see example below:
> {code}
> import groovy.transform.AutoClone
> import groovy.transform.AutoCloneStyle
> @AutoClone(style = AutoCloneStyle.COPY_CONSTRUCTOR)
> class MyClass {
>   MyClass(MyClass other) {
>     println 'custom copy constructor'
>   }
> }
> {code}
> If we compile and examine the generated code, we see duplication:
> {noformat}
> > groovyc MyClass.groovy 
> > javap -c MyClass | grep "MyClass("
>   protected MyClass(MyClass);
>   protected MyClass(MyClass);
> > 
> {noformat}
> This leads to compilation error later when MyClass.class is used in another code, like so,
> {noformat}
> Caught: java.lang.ClassFormatError: Duplicate method name&signature in class file MyClass
> java.lang.ClassFormatError: Duplicate method name&signature in class file MyClass
> {noformat}



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