[Bug]: ctArrayTypeReference.isSubtypeOf(...) returns true if the array type is a subtype

[Luro02]

Describe the bug

Obviously Integer[] is not a Number.

Source code you are trying to analyze/transform

public class Test { Integer[] field; }

Source code for your Spoon processing

import org.junit.jupiter.api.Test;
import spoon.Launcher;
import spoon.reflect.declaration.CtClass;
import spoon.reflect.declaration.CtField;
import spoon.reflect.declaration.CtType;
import spoon.reflect.reference.CtArrayTypeReference;
import spoon.reflect.reference.CtTypeReference;

import static org.junit.jupiter.api.Assertions.*;

class TestSpoon {
    @Test
    void testArraySubtype() {
        CtField<?> ctField = Launcher.parseClass("public class Test { Integer[] field; }")
            .getField("field");

        CtTypeReference<?> ctArrayType = ctField.getType();

        assertTrue(ctArrayType instanceof CtArrayTypeReference<?>, "ctArrayType should be an instance of CtArrayTypeReference");
        assertFalse(
            ctArrayType.isSubtypeOf(ctField.getFactory().Type().get(java.lang.Number.class).getReference()),
            "an array of integers should not be a subtype of Number"
        );
    }
}

Actual output

org.opentest4j.AssertionFailedError: an array of integers should not be a subtype of Number ==> 
Expected :false
Actual   :true

Expected output

No response

Spoon Version

10.4.1-SNAPSHOT

JVM Version

openjdk version "17.0.1" 2021-10-19 OpenJDK Runtime Environment Temurin-17.0.1+12 (build 17.0.1+12) OpenJDK 64-Bit Server VM Temurin-17.0.1+12 (build 17.0.1+12, mixed mode, sharing)

What operating system are you using?

Windows 10