The following test case causes verification errors. This is the simplest
possible test case to recreate the issue.

public class BugDemo {
    int jj_ntk;

        public static void main(String[] args) {
        BugDemo bd = new BugDemo();
                bd.jj_ntk = args.length;
                bd.foo();
        }

        final public void foo(){
                while (true) {
                        int i =0;
                        switch (jj_ntk) {
                                case 1:
                                        break;
                                default: ;
                        }
                        break;
                }

                switch (jj_ntk) {
                        case 1:
                                A j2 = (A)A.create(this);
                                break;
                        default:
                                swap();
                }
  }

        public int jj_ntk() {
                return jj_ntk;
        }
       
        public void swap() {
             jj_ntk = (jj_ntk == 1)? 0:1;
        }
}

class A {
    public static A create(Object obj) {
              return new A();
         }
}