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https://issues.apache.org/jira/browse/GROOVY-11389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17851644#comment-17851644
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Eric Milles edited comment on GROOVY-11389 at 6/3/24 1:59 PM:
--------------------------------------------------------------
There is a separate ticket (GROOVY-11105) about the release setting and reading
the appropriate {{ct.sym}} file so that new APIs don't get introduced for an
older target. This sounds like a similar issue. The few well-known types
loaded up by {{ClassHelper}} and some other constants in transforms pin the
release to the one that runs the tools for things like Object, String, List,
etc.
was (Author: emilles):
There is a separate ticket about the release setting and reading the
appropriate {{ct.sym}} file so that new APIs don't get introduced for an older
target. This sounds like a similar issue. The few well-known types loaded up
by {{ClassHelper}} and some other constants in transforms pin the release to
the one that runs the tools for things like Object, String, List, etc.
> Groovy @Delegate issue with Java 21
> -----------------------------------
>
> Key: GROOVY-11389
> URL: https://issues.apache.org/jira/browse/GROOVY-11389
> Project: Groovy
> Issue Type: Bug
> Components: Compiler
> Affects Versions: 4.0.21
> Reporter: paolo di tommaso
> Priority: Major
>
> Context: Java 21 introduces a new interface SequencedCollection
> as super-interface for `List` and other interfaces.
> This causes an issue in Groovy when the following conditions are met:
> 1. Using a `@Delegate List someAttribute` in a class
> 2. Compile with Java 21
> 3. Run with Java 20 or earlier the resulting app.
> *Replicate the issue*
>
> 0. Clone this repository
> [https://github.com/pditommaso/groovy-java21-poc]
>
> 1. Compile and run
>
> {code:java}
> ./gradlew run {code}
> Output:
> {code:java}
> Runtime: Groovy 4.0.21 on OpenJDK 64-Bit Server VM 21.0.3+9-LTS
> Plain list sub-class: [1, 2, 3]
> Delegate list class : [1, 2, 3] {code}
> 2. Setup Java 11
> {code:java}
> sdk use java 11.0.14-zulu {code}
> 3. Run the app with Java 11
> {code:java}
> bash run.sh {code}
> Output:
> {code:java}
> Runtime: Groovy 4.0.21 on OpenJDK 64-Bit Server VM 11.0.14+9-LTS
> Plain list sub-class: [1, 2, 3]
> Exception in thread "main" java.lang.NoClassDefFoundError:
> java/util/SequencedCollection
> at org.example.App.run(App.groovy:18)
> at org.example.App.main(App.groovy:22)
> Caused by: java.lang.ClassNotFoundException: java.util.SequencedCollection
> at
> java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
> at
> java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
> ... 2 more {code}
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