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https://issues.apache.org/jira/browse/GROOVY-10391?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17460037#comment-17460037
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Łukasz Pieróg commented on GROOVY-10391:
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[~emilles] any suggestion on how can I achieve that? afaik dynamically
generated module that the generated proxies belong to i.e., `jdk.proxy1`,
cannot be open to all-unnamed-modules like other modules
> Default interface methods causing problems with java 17 and groovy 3.0.9
> ------------------------------------------------------------------------
>
> Key: GROOVY-10391
> URL: https://issues.apache.org/jira/browse/GROOVY-10391
> Project: Groovy
> Issue Type: Bug
> Components: groovy-runtime
> Affects Versions: 3.0.9
> Environment: jdk 17.0.1 corretto
> gradle 7.3
> groovy 3.0.9
> Reporter: Łukasz Pieróg
> Priority: Major
> Fix For: 4.0.0-beta-2
>
>
> I'm trying to migrate a project to build on JDK17 and in that project we use
> groovy and spock for testing. It seems that groovy 3.* has a problem with
> reflection access to JDK especially visible when using closures
> A simple test class:
> {code:java}
> static void main(String[] args) {
> def predicate = {true} as java.util.function.Predicate
> predicate.negate()
> println "i don't work!! :("
> } {code}
> Produces
> {noformat}
> java.lang.IllegalAccessException: module jdk.proxy1 does not open jdk.proxy1
> to unnamed module @43517800{noformat}
> In line
> {code:java}
> predicate.negate() {code}
> .negate() being a default method in a Predicate interface which a part of the
> jdk
> The following however works:
> {code:java}
> static void main(String[] args) {
> def predicate = new Predicate() {
> @Override
> boolean test(Object o) {
> true
> }
> }
> predicate.negate()
> println "i work!! :)"
> } {code}
> I'm using JDK 17.0.1 Corretto for my tests and the example minimal project
> can be found here:
> [https://github.com/lukaszpierog/jdk17-groovy3]
> The above code works with groovy 4.0.0-beta-2. Spock does not support groovy
> 4 at this moment, so upgrading groovy to 4 isn't an option for me and it
> seems to only be a beta release at the moment.
> I've tried adding jvm args
> --add-opens=java.base/java.lang.invoke=ALL-UNNAMED
> however that does not seem to affect the output
> Please advise
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