A ResourceMark is missing in when log.debug_stream() is created:
void CompactibleFreeListSpace::reportFreeListStatistics(const char* title) const {
  assert_lock_strong(&_freelistLock);
  Log(gc, freelist, stats) log;
  if (!log.is_debug()) {
    return;
  }
  log.debug("%s", title);
  _dictionary->report_statistics(log.debug_stream());
  if (log.is_trace()) {
    ResourceMark rm;
    reportIndexedFreeListStatistics(log.trace_stream());
    size_t total_size = totalSizeInIndexedFreeLists() +
                       _dictionary->total_chunk_size(DEBUG_ONLY(freelistLock()));
    log.trace(" free=" SIZE_FORMAT " frag=%1.4f", total_size, flsFrag());
  }
}