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Software closes when a processing marker is deleted
Closed, ResolvedPublic


System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 750/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.13

Blender Version
Broken: version: 2.80 (sub 74), branch: master, commit date: 2019-07-11 13:50, hash: rB06312c6d2db8
Worked: (optional)

Short description of error
The software will close when you delete a marker while it has been tracked on motion tracking.

Exact steps for others to reproduce the error

  • Create a big marker on motion tracking to take some time to process.
  • Click on it and then click on "Track Markers"
  • Press "Delete" and click on "Delete Track"
  • Now Blender will close instantaneously.

Event Timeline

Sebastian Parborg (zeddb) lowered the priority of this task from Needs Triage by Developer to Needs Information from User.Jul 17 2019, 11:05 AM

Does this still happen with the latest blender beta and nvidia drivers?

I doubt this is related to graphics drivers, probably it's deleting data that the tracking is using in another thread.

I know, I'm just eliminating any other factor in the small chance that they were the issue.

Philipp Oeser (lichtwerk) raised the priority of this task from Needs Information from User to Confirmed, Medium.Jul 17 2019, 11:52 AM

Can confirm here, checking...

crash on framenr < track->markers[0].framenr, where track->markers is garbled... will check with ASAN...

1  BKE_tracking_marker_get                                    tracking.c           1339 0x1fd0999      
2  BKE_tracking_marker_get_exact                              tracking.c           1380 0x1fd0b33      
3  accessor_get_mask_for_track_callback                       tracking_util.c      940  0x1fdb012      
4  (anonymous namespace)::LibmvFrameAccessor::GetMaskForTrack    120  0x31c8e3a      
5  mv::(anonymous namespace)::GetMaskForMarker               118  0x31d1775      
6  mv::AutoTrack::TrackMarker                                164  0x31d19bc      
7  libmv_autoTrackMarker                                     63   0x31c5012      
8  autotrack_context_step_cb                                  tracking_auto.c      424  0x30944ab      
9  parallel_range_single_thread                               task.c               1103 0x20fc958      
10 BLI_task_parallel_range                                    task.c               1147 0x20fcb33      
11 BKE_autotrack_context_step                                 tracking_auto.c      452  0x30945ec      
12 track_markers_startjob                                     tracking_ops_track.c 233  0x2da19e6      
13 do_job_thread                                              wm_jobs.c            383  0x23e16b2      
14 tslot_thread_start                                         threads.c            260  0x20fd5f0      
15 start_thread                                                                         0x7ffff488b5a2 
16 clone                                                                                0x7ffff1c1f303

This is a missing check for the track in the movie clip being still available when synchronizing tracking data from Libmv to Blender.