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https://issues.apache.org/jira/browse/GROOVY-10103?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Paul King closed GROOVY-10103.
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> Lambda with command method call fails with cast exception
> ---------------------------------------------------------
>
> Key: GROOVY-10103
> URL: https://issues.apache.org/jira/browse/GROOVY-10103
> Project: Groovy
> Issue Type: Bug
> Affects Versions: 4.0.0-alpha-3
> Reporter: Eric Milles
> Priority: Major
> Fix For: 4.0.0-beta-2
>
> Attachments: image-2021-05-21-12-09-03-211.png
>
>
> Consider the following:
> {code:groovy}
> import java.util.function.*
> Supplier<String> s = () -> 'hello'
> print s.get()
> Consumer<String> c = x -> print x;
> c.accept(' ')
> Function<Integer, String> f = (Integer i) -> { 'world' }
> print f(42)
> {code}
> This script prints "hello world" under Groovy 3 but fails at runtime under
> Groovy 4 with exception:
> {code}
> org.codehaus.groovy.runtime.typehandling.GroovyCastException: Cannot cast
> object 'interface java.util.function.Consumer' with class 'java.lang.Class'
> to class 'java.util.function.Consumer'
> {code}
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