java.lang.IllegalArgumentException: "public native int java.lang.Object.hashCode()" is not a default method w/ Spock 2.2

[jochenberger]

Hi,
when upgrading one of my projects to Spock 2.2, I get

java.lang.IllegalArgumentException: "public native int java.lang.Object.hashCode()" is not a default method
	at org.spockframework.util.ReflectionUtil.invokeMethod(ReflectionUtil.java:187)
	at org.spockframework.mock.runtime.DefaultMethodInvoker.respond(DefaultMethodInvoker.java:49)
	at org.spockframework.mock.runtime.MockInvocation.callRealMethod(MockInvocation.java:61)
	at org.spockframework.mock.CallRealMethodResponse.respond(CallRealMethodResponse.java:30)
	at org.spockframework.mock.runtime.MockController.handle(MockController.java:50)
	at org.spockframework.mock.runtime.JavaMockInterceptor.intercept(JavaMockInterceptor.java:86)
	at org.spockframework.mock.runtime.DynamicProxyMockInterceptorAdapter.invoke(DynamicProxyMockInterceptorAdapter.java:34)
	at java.base/java.util.HashMap.hash(HashMap.java:338)
	at java.base/java.util.HashMap.put(HashMap.java:610)
	at java.base/java.util.HashSet.add(HashSet.java:221)
	at java.base/java.util.AbstractCollection.addAll(AbstractCollection.java:336)
	at java.base/java.util.LinkedHashSet.<init>(LinkedHashSet.java:170)
	at org.spockframework.mock.response.ConstantResponseGenerator.doRespond(ConstantResponseGenerator.java:35)
	at org.spockframework.mock.response.SingleResponseGenerator.respond(SingleResponseGenerator.java:32)
	at org.spockframework.mock.response.ResponseGeneratorChain.respond(ResponseGeneratorChain.java:44)
	at org.spockframework.mock.runtime.MockInteraction.accept(MockInteraction.java:73)
	at org.spockframework.mock.runtime.MockInteractionDecorator.accept(MockInteractionDecorator.java:50)
	at org.spockframework.mock.runtime.InteractionScope$1.accept(InteractionScope.java:57)
	at org.spockframework.mock.runtime.MockController.handle(MockController.java:40)
	at org.spockframework.mock.runtime.JavaMockInterceptor.intercept(JavaMockInterceptor.java:86)
	at org.spockframework.mock.runtime.DynamicProxyMockInterceptorAdapter.invoke(DynamicProxyMockInterceptorAdapter.java:34)
	at org.example.ClassUnderTest.execute(ClassUnderTest.java:106)
	at org.example.ClassUnderTestSpec.test(ClassUnderTestSpec.groovy:64)

I'm using 2.2-groovy-3.0 on Java 17.
Could this have something to do with #1406 /#1407?

[leonard84]

@jochenberger could you please share a reproducer.

[jochenberger]

I'm working on it. Seems to have something to do with Spies.

[jochenberger]

@leonard84, there you go:

import spock.lang.Specification

class BreakingSpec extends Specification {

    def "break it"(){
        given:
        Serializable o = Spy()
        def s = new HashSet()
        when:
        s.add(o)
        then:
        s.size() == 1
    }
}

[jochenberger]

No, wait, that doesn't work on 2.1 either. I'll keep on trying...
Oh, yes, it does with --add-opens=java.base/java.lang.invoke=ALL-UNNAMED.

[leonard84]

I've created an issue #1516 to track this, any further discussion should be done there.