to reproduce run javap -v

at the bottom of output you get
Error: A serious internal error has occurred: java.lang.IllegalStateException: !R!untimeVisibleParameterAnnotations Please file a bug report, and include the following information: java.lang.IllegalStateException: !R!untimeVisibleParameterAnnotations
 at com.sun.tools.classfile.Signature.parseTypeSignature(Signature.java:180)
 at com.sun.tools.classfile.Signature.parse(Signature.java:104)
 at com.sun.tools.classfile.Signature.getType(Signature.java:48)
 at com.sun.tools.javap.ClassWriter.writeMethod(ClassWriter.java:433)
 at com.sun.tools.javap.ClassWriter.writeMethods(ClassWriter.java:408)
 at com.sun.tools.javap.ClassWriter.write(ClassWriter.java:219)
 at com.sun.tools.javap.JavapTask.write(JavapTask.java:814)
 at com.sun.tools.javap.JavapTask.writeClass(JavapTask.java:636)
 at com.sun.tools.javap.JavapTask.run(JavapTask.java:590)
 at com.sun.tools.javap.JavapTask.run(JavapTask.java:455)
 at com.sun.tools.javap.Main.main(Main.java:46)