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https://issues.apache.org/jira/browse/GROOVY-9814?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-9814.
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> Method reference doesn't accept subtypes of argument
> ----------------------------------------------------
>
> Key: GROOVY-9814
> URL: https://issues.apache.org/jira/browse/GROOVY-9814
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 3.0.6
> Reporter: Christopher Smith
> Assignee: Eric Milles
> Priority: Major
> Fix For: 3.0.7, 4.0.0-alpha-2
>
> Attachments: Groovy9814.groovy
>
> Time Spent: 40m
> Remaining Estimate: 0h
>
> When using a method reference such as {{HasId::getId}}, the compiler
> implements the request by generating a {{MethodClosure}}. However, the
> closure accepts only the exact type of the reference, not subtypes. All
> compile-time checks pass, but the closure throws {{MissingMethodException}}
> at runtime with the message
> {code}
> No signature of method: org.codehaus.groovy.runtime.MethodClosure.getId() is
> applicable for argument types: (com.example.ClassWithId)
> {code}
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