Running "jar --validate --file JAR-FILE" may lead to "java.lang.UnsupportedOperationException: This feature requires ASM..." exceptions. Find details in stack trace attached at the end of this description.

The underlying reason is a usage of "Opcodes.ASM7" in the sun.tools.jar.FingerPrint class.

Find a minimal reproducer at https://github.com/sormuras/JDK-8282446

{{
java.lang.UnsupportedOperationException: This feature requires ASM9_EXPERIMENTAL
        at java.base/jdk.internal.org.objectweb.asm.ClassVisitor.visitPermittedSubclassExperimental(ClassVisitor.java:299)
        at java.base/jdk.internal.org.objectweb.asm.ClassReader.accept(ClassReader.java:715)
        at java.base/jdk.internal.org.objectweb.asm.ClassReader.accept(ClassReader.java:432)
        at jdk.jartool/sun.tools.jar.FingerPrint.getClassAttributes(FingerPrint.java:165)
        at jdk.jartool/sun.tools.jar.FingerPrint.<init>(FingerPrint.java:81)
}}

{{
java.lang.UnsupportedOperationException: This feature requires ASM8
        at java.base/jdk.internal.org.objectweb.asm.ClassVisitor.visitRecordComponent(ClassVisitor.java:338)
        at java.base/jdk.internal.org.objectweb.asm.ClassReader.readRecordComponent(ClassReader.java:962)
        at java.base/jdk.internal.org.objectweb.asm.ClassReader.accept(ClassReader.java:740)
        at java.base/jdk.internal.org.objectweb.asm.ClassReader.accept(ClassReader.java:432)
        at jdk.jartool/sun.tools.jar.FingerPrint.getClassAttributes(FingerPrint.java:165)
        at jdk.jartool/sun.tools.jar.FingerPrint.<init>(FingerPrint.java:81)
}}