sbool interruptThread_verbose;

svoid interruptThread(Thread t) {
  if (t == null) ret;
  if (interruptThread_verbose) print("Interrupting thread " + t);
  
  // note reason in global map
  
  vm_threadInterruptionReasonsMap().put(t, getStackTrace());
  
  t.interrupt();
  URLConnection c = cast vm_generalSubMap("URLConnection per thread").get(t);
  if (c != null) pcall {
    print("Closing URLConnection of interrupted thread.");
    call(c, 'disconnect);
  }
}

Began life as a copy of #1008281