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Maniphest T61519

Add Curve: Extra Objects + bone + spline ik crash
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Description

System Information
Operating system: Linux Ubuntu 18.04
Graphics card: Intel iGPU HD4600

Blender Version
Broken:
blender-2.80-9a8a5676da82-linux-glibc224-x86_64
Worked: (optional)
2.79

Short description of error
bone + spline ik cashes blender if target curve is generated via Add Curve: Extra Objects add-on

Workaround
copy curve to blender 2.79 and copy it back from 2.79 to 2.8

Video:
https://drive.google.com/open?id=18E8ajIWLFcj89-YGCKfEP_UfDJw-oJ3J

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

curve_bug.blend869 KBDownload

Event Timeline

Piotr Kudzin (sng84) created this task.Feb 13 2019, 7:51 PM
Sebastian Parborg (zeddb) assigned this task to Campbell Barton (campbellbarton).Feb 13 2019, 8:17 PM
Sebastian Parborg (zeddb) lowered the priority of this task from 90 to 50.
Sebastian Parborg (zeddb) added a subscriber: Sebastian Parborg (zeddb).

Backtrace:

Thread 1 "blender" received signal SIGSEGV, Segmentation fault.
0x00005555568375f4 in splineik_init_tree_from_pchan (pchan_tip=pchan_tip@entry=0x7fffd1019288, UNUSED_ob=<optimized out>, scene=<optimized out>)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/armature_update.c:206
206			maxScale = totLength / splineLen;
(gdb) bt
#0  0x00005555568375f4 in splineik_init_tree_from_pchan (pchan_tip=pchan_tip@entry=0x7fffd1019288, UNUSED_ob=<optimized out>, scene=<optimized out>)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/armature_update.c:206
#1  0x000055555683765e in splineik_init_tree (scene=<optimized out>, ob=<optimized out>, UNUSED_ctime=<optimized out>)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/armature_update.c:257
#2  BKE_pose_splineik_init_tree (scene=<optimized out>, ob=<optimized out>, ctime=<optimized out>)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/armature_update.c:545
#3  0x0000555556bce350 in std::function<void (Depsgraph*)>::operator()(Depsgraph*) const (__args#0=<optimized out>, this=0x7fffcec46da8)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/8.2.0/include/g++-v8/bits/std_function.h:682
#4  DEG::deg_task_run_func (pool=0x7fffceff5008, taskdata=0x7fffcec46d48, thread_id=0)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:87
#5  0x0000555556bb0614 in handle_local_queue (thread_id=0, tls=0x7fffd7e60018)
    at /home/zed/programmering/blender_master/blender/source/blender/blenlib/intern/task.c:416
#6  BLI_task_pool_work_and_wait (pool=0x7fffceff5008) at /home/zed/programmering/blender_master/blender/source/blender/blenlib/intern/task.c:903
#7  0x0000555556bce5d3 in DEG::deg_evaluate_on_refresh (graph=graph@entry=0x7fffe43f6b08)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:320
#8  0x0000555556bbb928 in DEG_evaluate_on_refresh (graph=graph@entry=0x7fffe43f6b08)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/depsgraph_eval.cc:62
#9  0x0000555556967157 in BKE_scene_graph_update_tagged (depsgraph=depsgraph@entry=0x7fffe43f6b08, bmain=bmain@entry=0x7fffcf34c108)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/scene.c:1496
#10 0x000055555610af68 in wm_event_do_depsgraph (C=C@entry=0x7fffe9458108)
    at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm_event_system.c:340
#11 0x000055555610b005 in wm_event_do_refresh_wm_and_depsgraph (C=C@entry=0x7fffe9458108)
    at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm_event_system.c:365
#12 0x000055555611185a in wm_event_do_notifiers (C=C@entry=0x7fffe9458108)
    at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm_event_system.c:523
#13 0x00005555561078a8 in WM_main (C=0x7fffe9458108) at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm.c:420
#14 0x00005555560f2403 in main (argc=1, argv=0x7fffffffdd38) at /home/zed/programmering/blender_master/blender/source/creator/creator.c:504
Vladimir Spivak (cwolf3d) added a subscriber: Vladimir Spivak (cwolf3d).Feb 13 2019, 8:46 PM

Most likely the problem is in the disabled Path Animation. Standard curves are created with Path Animation enabled, and Add Curve: Extra Objects are created without Path Animation enabled. If in object mode you disable Path Animation in a standard curve, it Blender 2.8 crashed.

Piotr Kudzin (sng84) added a comment.EditedFeb 13 2019, 9:38 PM
In T61519#620123, @Vladimir Spivak (cwolf3d) wrote:

Most likely the problem is in the disabled Path Animation. Standard curves are created with Path Animation enabled, and Add Curve: Extra Objects are created without Path Animation enabled. If in object mode you disable Path Animation in a standard curve, it Blender 2.8 crashed.

enabling path animation solves the issue (maybe not the core issue, but i can cray on with modeling with no crash). Thanks!

Vladimir Spivak (cwolf3d) changed the task status from Unknown Status to Resolved.Jul 14 2019, 12:36 PM

Verified. In the latest build, this error does not appear.