Hi Andrew, When changing this, to be more in line with the "HV" code... diff --git a/cinelerra-5.1/cinelerra/playbackengine.C b/cinelerra-5.1/cinelerra/playbackengine.C index 815e506f..3c2a9368 100644 --- a/cinelerra-5.1/cinelerra/playbackengine.C +++ b/cinelerra-5.1/cinelerra/playbackengine.C @@ -172,9 +172,9 @@ void PlaybackEngine::create_cache() { cache_lock->lock("PlaybackEngine::create_cache"); if( audio_cache ) - audio_cache->remove_user(); + delete audio_cache; if( video_cache ) - video_cache->remove_user(); + delete video_cache; audio_cache = new CICache(preferences); video_cache = new CICache(preferences); cache_lock->unlock(); ...will result in a fix for the memory leak, but does cause a warning message. Garbage::~Garbage: title=CICache users=1 was not deleted by Garbage::remove_user This was changed with f5725c7e (7/4/20). But also shows that many unrelated changes cause real issues to hide. I found this by hand, not even using git bisect. I understand the urge for the garbage collector, but for some reason not behaving. What I notice is that the 'last' object is empty when it is actually destroyed by the garbage collector (~CICache). What is the best way going forward? -- Stefan