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https://issues.apache.org/jira/browse/GROOVY-9853?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Milles resolved GROOVY-9853.
---------------------------------
    Fix Version/s: 5.0.0-alpha-1
       Resolution: Fixed

https://github.com/apache/groovy/commit/c40dba6c6b196e8d7882917b7d3ec0cab963e31f

> ClassFormatError using method reference on interface target
> -----------------------------------------------------------
>
>                 Key: GROOVY-9853
>                 URL: https://issues.apache.org/jira/browse/GROOVY-9853
>             Project: Groovy
>          Issue Type: Bug
>    Affects Versions: 3.0.7, 4.0.2
>            Reporter: Christopher Smith
>            Assignee: Eric Milles
>            Priority: Major
>             Fix For: 5.0.0-alpha-1
>
>
> After upgrading to 3.0.7, using {{interfaceField::method}} is resulting in 
> bytecode output containing an InterfaceMethodref that looks as expected. When 
> running it in the Eclipse JUnit runner, however (which I think is 
> unimportant), I'm getting a loading error from the JVM:
> {code}
> Caused by: java.lang.ClassFormatError: Invalid constant pool index 130 in 
> class file com/example/sendgrid/SendgridMailSender (not a method)
> {code}
> where the offending constant is
> {code}
>   #130 = InterfaceMethodref #126.#129     // 
> com/sendgrid/SendGridAPI.api:(Lcom/sendgrid/Request;)Lcom/sendgrid/Response;
> {code}
> from the 4.6.8 SendGrid SDK.
> Compiling with 3.0.6 seems to work. Replacing {{::}} with {{.&}} seems to 
> work.
> The JVM is 11.0.9-hs-adpt.



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