java.util.ConcurrentModificationException: java.util.ConcurrentModificationException
at java.base/jdk.internal.reflect.DirectConstructorHandleAccessor.newInstance(DirectConstructorHandleAccessor.java:62)
at java.base/java.lang.reflect.Constructor.newInstanceWithCaller(Constructor.java:502)
at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:486)
at java.base/java.util.concurrent.ForkJoinTask.getThrowableException(ForkJoinTask.java:540)
...