acae86781b
In rare cases it can happen that the GUI thread results in a call to DropReferences(), while the backend (RCU) still has a reference to the track and processes the track. However the call to DropReferences, DiskIO processor will have cleared the pointer to _track, leading to segfaults when the processor runs. Since the DIO processor is owned by the track, one cannot directly pass a shared_ptr<Track>. That would keep the Track around forever. However the DIO processor cannot exist without a track passing a reference is acceptable.
Please see the Ardour web site at http://ardour.org/ for all documentation..
For information on building ardour:
http://ardour.org/development.html