Regression in 3.13.0.CR1: Lambda expression from custom serializable interface used as `@QuarkusTest` method parameter fails with `ClassNotFoundException`

[famod]

Describe the bug

Up until 3.12.3 you can create a lambda expression from something like:

    public interface SerializableCustom extends Serializable {
        String get();
    }

and pass it over to a @QuarkusTest method as a parameter, e.g.:

@QuarkusTest
public class LambdaParamTest {

    @ParameterizedTest
    @ArgumentsSource(LambdaProvider.class)
    void test(final SerializableCustom lambda) {
        // ...
    }

    private static class LambdaProvider implements ArgumentsProvider {

        @Override
        public Stream<? extends Arguments> provideArguments(final ExtensionContext context) {
            return Stream.of(Arguments.of((SerializableCustom) () -> "foobar"));
        }
    }

but with 3.13.0.CR1 you'll get:

java.lang.IllegalStateException: java.lang.ClassNotFoundException: org.acme.LambdaParamTest$LambdaProvider$$Lambda/0x00007fa1844f3158
	at io.quarkus.test.junit.internal.NewSerializingDeepClone.clone(NewSerializingDeepClone.java:132)
	[...]

Expected behavior

Cloning works for lambdas created from custom serializable interfaces.

Actual behavior

Exception is thrown.

How to Reproduce?

q_test-lambda.zip

• ./mvnw clean test fails
• ./mvnw clean test -Dquarkus.platform.version=3.12.3 passes

Note that the reproducer also includes a working lambda example for both versions (using a subclass of java.util.function.Supplier<T>).

Output of uname -a or ver

No response

Output of java -version

No response

Quarkus version or git rev

3.13.0.CR1

Build tool (ie. output of mvnw --version or gradlew --version)

No response

Additional information

I suppose this is related to #40906, /cc @holly-cummins

Workaround: Use anonymous class instead.

[quarkus-bot]

/cc @matejvasek (amazon-lambda), @patriot1burke (amazon-lambda)

[gastaldi]

It seems to have been caused by #40601 (which was reverted in 3.12 before it was released and reverted back in 3.13)

/cc @dmlloyd

[famod]

Btw, I'd prefer not having to add Serializable at all, but up to now it is/was the only way to pass lambdas as test method params.

[dmlloyd]

You should be able to pass the argument as non-serializable now, and it should work. A more comprehensive solution (i.e. not serializing anymore) is being worked on in the meantime.

[famod]

You should be able to pass the argument as non-serializable now, and it should work.

That's very valuable info, thanks! Could be something for the migration guide, no?

I'm a bit puzzled now why I didn't see that when starting the reproducer because I was first missing extends Serializable and got a null test method parameter - which went away after adding Serializable. I was probably still on 3.12.3 at that point. 🤔

But I do confirm that removing Serializable does make the test of the reproducer pass (with 3.13.0.CR1).
Sadly, when I apply the same fix to my actual project, I'm greeted with a ClassCastException which I have not yet managed to showcase in the reproducer:

CatalogDataTest.mandatoryMetadataComplete:78->lambda$3:80->lambda$4:81 » ClassCast class somepckg.persistence.entity.catalog.Contextualized$$Lambda/0x00007fee71cec000 cannot be cast to class somepckg.persistence.entity.catalog.CatalogValue$MetadataKey (somepckg.persistence.entity.catalog.Contextualized$$Lambda/0x00007fee71cec000 is in unnamed module of loader 'app'; somepckg.persistence.entity.catalog.CatalogValue$MetadataKey is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @19324eab)

[famod]

But I do confirm that removing Serializable does make the test of the reproducer pass (with 3.13.0.CR1). Sadly, when I apply the same fix to my actual project, I'm greeted with a ClassCastException which I have not yet managed to showcase in the reproducer:

CatalogDataTest.mandatoryMetadataComplete:78->lambda$3:80->lambda$4:81 » ClassCast class somepckg.persistence.entity.catalog.Contextualized$$Lambda/0x00007fee71cec000 cannot be cast to class somepckg.persistence.entity.catalog.CatalogValue$MetadataKey (somepckg.persistence.entity.catalog.Contextualized$$Lambda/0x00007fee71cec000 is in unnamed module of loader 'app'; somepckg.persistence.entity.catalog.CatalogValue$MetadataKey is in unnamed module of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @19324eab)

FWIW, this is still the case in 3.14.2 which contains #42916.