While observing a loop while using -verbose option it would seem that a destructor call 
in the iterator constructor causes wait_until_no_readers to go into an infinite loop.

On analysis the issue seems to be in file src/hotspot/share/logging/logOutputList.cpp

The issue is due to invoking of destructor in iterator constructor due to creation of 
an object in the following code:

 Iterator iterator(LogLevelType level = LogLevel::Last) {
    increase_readers();
    return Iterator(this, _level_start[level]);
  }

Again, when the object is destroyed, the destructor is called again.

Due to this the _active_readers count becomes negative and wait_until_no_readers 
goes into infinite loop.

void LogOutputList::wait_until_no_readers() const {
  OrderAccess::storeload();
  while (_active_readers != 0) {
    // Busy wait
  }
}