[GROOVY-10413] IllegalAccessException when using closures for functional interfaces with default methods

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 3.0.9
• Fix Version/s: 4.0.0-beta-1
• Environment: Groovy 3.0.9, Amazon Corretto 17.0, Windows 10 Enterprise, German, x64

Language

English groovy java

• Assignee: Unassigned
• Reporter: Christoph Loy
• Created: 14/Dec/21 12:47
• Updated: 03/Feb/22 22:34
• Resolved: 16/Dec/21 14:16

Description

 

Given:

• A functional interface `IStillFunctional` with a method `foo` and a default-method `bar`.
• A java method `doConsume(IStillFunctional)` (defined in a Java-Class)

I get an `IllegalAccessException` when I pass a Closure to the `doConsume` method and then call the default-method `bar`.

Stacktrace:

 

Caught: java.lang.reflect.InvocationTargetException
java.lang.reflect.InvocationTargetException
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at jdk.proxy2/jdk.proxy2.$Proxy18.bar(Unknown Source)
    at com.Consumer2.doConsume(Consumer2.java:6)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at com.GroovyMain.run(GroovyMain.groovy:3)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at com.GroovyMain.main(GroovyMain.groovy)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
Caused by: java.lang.IllegalAccessException: module jdk.proxy2 does not open jdk.proxy2 to unnamed module @51565ec2
    ... 19 more 

I attached a minimal project with this issue to the ticket.

 

Observations:

• The issue seems to happen in org.codehaus.groovy.runtime.ConversionHandler#invoke.
• The issue does not happen when the Consumer-Class is defined in a Groovy file.
• The issue did not occur under JDK 11