- _events = static_cast<VstEvents*> (malloc (sizeof (VstEvents) + _capacity * sizeof (VstEvent *)));
- _midi_events = static_cast<VstMidiEvent*> (malloc (sizeof (VstMidiEvent) * _capacity));
+ if (_capacity > 0) {
+ /* from `man malloc`: "If size is 0, then malloc() returns either NULL, or a
+ * unique pointer value that can later be successfully passed to free()."
+ *
+ * The latter will cause trouble here.
+ */
+ _events = static_cast<VstEvents*> (malloc (sizeof (VstEvents) + _capacity * sizeof (VstEvent *)));
+ _midi_events = static_cast<VstMidiEvent*> (malloc (sizeof (VstMidiEvent) * _capacity));
+ }