paolo di tommaso created GROOVY-11389:
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Summary: Groovy @Delegate issue with target compatibility Java 11
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
C0ntext: 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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