Since JDK-8373806 (disable patching), simple Test case fails when using exploded-image:

public class Test {
    static value class IntBox {
        Integer integerValue;

        public IntBox(Integer integerValue) {
            this.integerValue = integerValue;
        }
    }

    public static void main(String[] args) {
        IntBox val1 = new IntBox(0);
        IntBox val2 = new IntBox(0);
        if (val1 != val2) throw new RuntimeException("FAIL");
    }
}

$> make exploded-image && build/$CONF_NAME/jdk/bin/javac --enable--preview --source 26 Test.java && build/$CONF_NAME/jdk/bin/java --enable--preview Test
Exception in thread "main" java.lang.RuntimeException: FAIL
        at Test.main(Test.java:13)
$> make && build/$CONF_NAME/images/jdk/bin/java --enable--preview Test && echo $?
0