IllegalAccessError: sun.awt.image.SurfaceManager$ImageAccessor (in module java.desktop / Java 16)

[don-vip]

Describe the bug
Test work with Java 8-15, no longer with Java 16, throws an IllegalAccessError.

To Reproduce
Run test below with Java 16.

Code that triggers the behavior

import java.util.Objects;
import org.junit.jupiter.api.Test;
import nl.jqno.equalsverifier.EqualsVerifier;
import nl.jqno.equalsverifier.Warning;

class ImageEntryTest {

    @Test
    void testEqualsContract() {
        EqualsVerifier.forClass(ImageEntry.class).usingGetClass()
            .suppress(Warning.NONFINAL_FIELDS)
            .verify();
    }

    public final class ImageEntry {

        private java.awt.Image thumbnail;

        @Override
        public int hashCode() {
            return Objects.hash(thumbnail);
        }

        @Override
        public boolean equals(Object obj) {
            if (this == obj)
                return true;
            if (obj == null || getClass() != obj.getClass())
                return false;
            ImageEntry other = (ImageEntry) obj;
            return Objects.equals(thumbnail, other.thumbnail);
        }
    }
}

Error message

java.lang.AssertionError: EqualsVerifier found a problem in class org.openstreetmap.josm.gui.layer.geoimage.ImageEntry.
-> Error invoking java.lang.invoke.MethodHandles$Lookup#defineClass

For more information, go to: http://www.jqno.nl/equalsverifier/errormessages
	at nl.jqno.equalsverifier.api.SingleTypeEqualsVerifierApi.verify(SingleTypeEqualsVerifierApi.java:294)
	at org.openstreetmap.josm.gui.layer.geoimage.ImageEntryTest.testEqualsContract(ImageEntryTest.java:39)
    ...
Caused by: java.lang.IllegalAccessError: superclass access check failed: class nl.jqno.equalsverifier.internal.reflection.ImageAccessor$$DynamicSubclass$752001567 (in unnamed module @0x31a5c39e) cannot access class sun.awt.image.SurfaceManager$ImageAccessor (in module java.desktop) because module java.desktop does not export sun.awt.image to unnamed module @0x31a5c39e
	at java.base/java.lang.ClassLoader.defineClass0(Native Method)
	at java.base/java.lang.System$2.defineClass(System.java:2193)
	at java.base/java.lang.invoke.MethodHandles$Lookup$ClassDefiner.defineClass(MethodHandles.java:2446)
	at java.base/java.lang.invoke.MethodHandles$Lookup$ClassDefiner.defineClass(MethodHandles.java:2423)
	at java.base/java.lang.invoke.MethodHandles$Lookup.defineClass(MethodHandles.java:1850)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:567)
	at nl.jqno.equalsverifier.internal.lib.bytebuddy.dynamic.loading.ClassInjector$UsingLookup$Dispatcher$ForJava9CapableVm.defineClass(ClassInjector.java:1773)
	... 108 more

Expected behavior
No error.

Version
3.5.4

[jqno]

I noticed a similar error in Java 11. I've added a prefab value for java.awt.Image, that should probably fix it. I'll try to make a release soon.

[jqno]

I've just released version 3.5.5!