build failed

[Bruce0203]

Caused by: java.lang.IllegalArgumentException: Unsupported class file major version 63
        at org.objectweb.asm.ClassReader.<init>(ClassReader.java:199)
        at org.objectweb.asm.ClassReader.<init>(ClassReader.java:180)
        at org.objectweb.asm.ClassReader.<init>(ClassReader.java:166)
        at org.objectweb.asm.ClassReader.<init>(ClassReader.java:287)
        at kr.entree.spigradle.module.common.SubclassDetection.inspect(SubclassDetection.kt:103)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
        at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:125)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:45)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:51)
        at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.execute(IncrementalTaskAction.java:26)
        at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:29)

there is some issue related from embedded JVM platform, that reflections do not detect classes with Java 11.0.16...
more info...

so I wish spigradle support using reflections option ON/OFF
source code link

[Bruce0203]

I realized the problem was Java version compatibility problem...
Duh.