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https://issues.apache.org/jira/browse/GROOVY-11707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-11707.
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> Inherting the same Generic Interface at different levels in an inheritance
> hierachy causes error
> ------------------------------------------------------------------------------------------------
>
> Key: GROOVY-11707
> URL: https://issues.apache.org/jira/browse/GROOVY-11707
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 5.0.0-beta-1
> Reporter: Saravanan
> Assignee: Eric Milles
> Priority: Minor
> Fix For: 5.0.0-beta-2
>
>
> {code:java}
> public class Testing {
> interface TopLevel extends Comparable {
> void blah();
> }
> interface NextLevel extends TopLevel, Comparable {
> }
> } {code}
> Compiling this with @CompileStatic enabled results in this error
> {code:java}
> org.codehaus.groovy.control.MultipleCompilationErrorsException: startup
> failed:
> testdata/plugins/records/RecordTesting.java: 10: The interface Comparable
> cannot be implemented more than once with different arguments:
> java.lang.Comparable<java.lang.Object> and java.lang.Comparable
> . At [10:5] @ line 10, column 5.
> interface NextLevel extends TopLevel, Comparable {
> ^ {code}
> Not sure if this is expected behaviour. The error goes away if I extend
> Comparable<Object>
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