Region::update_after_tempo_map_change (false);
/* _start has now been updated. */
- _length = _session.tempo_map().frames_between_quarter_notes (pos_beats(), pos_beats() + _length_beats);
+ _length = max ((framecnt_t) 1, _session.tempo_map().frames_between_quarter_notes (pos_beats(), pos_beats() + _length_beats));
if (old_start != _start) {
s_and_l.add (Properties::start);