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Motion Tracking curve deletion crashes blender 2.8 Beta
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Description

System Information
Fedora 29 with Nvidia 1070 GPU

Blender Version
2.80 Beta Linux 64 bit
December 05, 03:55:37 - d59c4c9d61a

Short description of error
Crashing when deleting curve from Motion Tracking.
Do some basic tracking but when try to delete some tracking curves - sometimes crash happens (not allways but mostly crashes)

from tracking_test.crash.txt

# Blender 2.80 (sub 35), Commit date: 2018-12-05 03:23, Hash d59c4c9d61a
bpy.ops.clip.open(directory="/mnt/media/Projects/Eximus/Workshop/Week Two/assets/", files=[{"name":"VID_20181204_135147.mp4", "name":"VID_20181204_135147.mp4"}], relative_path=True)  # Operator
bpy.ops.clip.detect_features()  # Operator
bpy.ops.clip.graph_delete_curve()  # Operator
bpy.ops.clip.graph_delete_curve()  # Operator
bpy.ops.clip.solve_camera()  # Operator
Some data failed to reconstruct (see console for details)  # Warning
bpy.ops.clip.solve_camera()  # Operator
Some data failed to reconstruct (see console for details)  # Warning
bpy.ops.clip.graph_delete_curve()  # Operator
bpy.ops.clip.graph_delete_curve()  # Operator
bpy.ops.clip.graph_delete_curve()  # Operator

# backtrace
./blender(BLI_system_backtrace+0x1d) [0x1b8284d]
./blender() [0x114f5c9]
/lib64/libpthread.so.0(+0x13070) [0x7f819596e070]
./blender(clip_draw_dopesheet_main+0x3a0) [0x1264b40]
./blender() [0x1256dfa]
./blender(ED_region_do_draw+0x811) [0x1446bf1]
./blender(wm_draw_update+0x441) [0x1151e21]
./blender(WM_main+0x30) [0x114ffe0]
./blender(main+0x31e) [0x10b5e0e]
/lib64/libc.so.6(__libc_start_main+0xf3) [0x7f81955a4413]
./blender(_start+0x2a) [0x114c0aa]

Details

Type
Bug

Event Timeline

Jacques Lucke (JacquesLucke) triaged this task as Needs Information from User priority.Dec 5 2018, 11:01 AM

Could you please share an example .blend file that we can use to reproduce the bug?

Here is Blend and Video file used ...


However i have tried several times with clean blend and different video file - same result, can delete one or two curves max then freeze - crash.

Ohhh really weird, just found pattern:

  1. When i open directly file tracking_test.blend - looks like everything is fine , can delete without crash
  2. First open blender and from splash menu open last used - in my case tracking_test.blend and problem appears.

Really strange, crash happens when you first open blender then file, and works fine when you directly open file from nautilus in my case.

Hmmm, I can't reproduce it right now. Maybe I just don't know exactly what I'm doing. Could you make a short video in which you show exactly what you do to make it crash?

Ok ill try to do some cinema :) here :

So the terminal output : https://paste.gnome.org/pp3ewezst
And yet another screencast :

I can reproduce this as well. I open the tracking_test.blend file from above, select any Marker, hit X to delete: -> CRASH.
Here's the log from --debug-all: http://pasteall.org/1402918

Bastien Montagne (mont29) raised the priority of this task from Needs Information from User to Normal.Dec 13 2018, 11:07 PM