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Blender 2.80 crashes when adding keyframe to Fac in compositing node editor
Closed, ResolvedPublic

Description

System Information
Operating system: Arch latest
Graphics card: GTX 1080 Ti x 2

Blender Version
Broken: 2.80 ecdd1864d162

Short description of error
When working with more than one node, such as Alpha Over, adding a keyframe in any of the conventional ways crashes Blender... at least on the Fac attribute (Premult seems fine). This is true whether the node is connected, or not.

Exact steps for others to reproduce the error

  1. Open Compositor Node Editor
  2. Add any input node (Image Node is as good as any)
  3. Add an Alpha Over node and insert keyframe to the Fac attr (should be fine)
  4. Add another Alpha Over node (or duplicate existing one); insert keyframe
  5. CRASH!!!

Based on the default startup or an attached .blend file (as simple as possible).

Event Timeline

Sebastian Parborg (zeddb) triaged this task as Needs Information from User priority.Feb 19 2019, 12:08 PM

I can't reproduce this on my end.

Could you upload a simple .blend file where I can just open it and insert a keyframe and it should crash?
Just to double check that I'm not missing something.

Sure. It would appear as though it occurs with Image Sequences, in particular. I've included a packed .blend file with a simple node set-up to demo the crash. Just change one or all of the Image nodes to Image Sequence and add a keyframe to Fac on the third Alpha Over node. It'll crash.

Sebastian Parborg (zeddb) raised the priority of this task from Needs Information from User to Confirmed, Medium.Feb 19 2019, 7:30 PM

Backtrace:

Thread 1 "blender" received signal SIGSEGV, Segmentation fault.
0x0000555556bbeba8 in DEG::Depsgraph::check_nodes_connected (this=0x7fffe4fbcb08, from=0x0, to=0x7fffcd67df08, description=0x555557d1e438 "Animation -> Prop")
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/depsgraph.cc:211
211		for (Relation *rel : from->outlinks) {
(gdb) bt
#0  0x0000555556bbeba8 in DEG::Depsgraph::check_nodes_connected (this=0x7fffe4fbcb08, from=0x0, to=0x7fffcd67df08,
    description=0x555557d1e438 "Animation -> Prop") at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/depsgraph.cc:211
#1  0x0000555556bbef5d in DEG::Depsgraph::add_new_relation (this=<optimized out>, from=from@entry=0x0, to=to@entry=0x7fffcd67df08,
    description=description@entry=0x555557d1e438 "Animation -> Prop", flags=flags@entry=32)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/depsgraph.cc:183
#2  0x0000555556bcc094 in DEG::DepsgraphRelationBuilder::build_animdata_curves_targets (this=this@entry=0x7fffffffd9d0, id=id@entry=0x7fffcf14c408,
    adt_key=..., operation_from=operation_from@entry=0x0, curves=<optimized out>)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/builder/deg_builder_relations.cc:1287
#3  0x0000555556bcd323 in DEG::DepsgraphRelationBuilder::build_animdata_curves (this=this@entry=0x7fffffffd9d0, id=id@entry=0x7fffcf14c408)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/builder/deg_builder_relations.cc:1240
#4  0x0000555556bcdd0c in DEG::DepsgraphRelationBuilder::build_animdata (this=this@entry=0x7fffffffd9d0, id=id@entry=0x7fffcf14c408)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/builder/deg_builder_relations.cc:1206
#5  0x0000555556bce528 in DEG::DepsgraphRelationBuilder::build_nodetree (this=this@entry=0x7fffffffd9d0, ntree=0x7fffcf14c408)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/builder/deg_builder_relations.cc:2323
#6  0x0000555556bd05bc in DEG::DepsgraphRelationBuilder::build_compositor (this=this@entry=0x7fffffffd9d0, scene=scene@entry=0x7fffcf323008)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/builder/deg_builder_relations.cc:2427
#7  0x0000555556bd3a12 in DEG::DepsgraphRelationBuilder::build_view_layer (this=this@entry=0x7fffffffd9d0, scene=scene@entry=0x7fffcf323008,
    view_layer=view_layer@entry=0x7fffccf88908)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/builder/deg_builder_relations_view_layer.cc:114
#8  0x0000555556bbf360 in DEG_graph_build_from_view_layer (graph=0x7fffe4fbcb08, bmain=0x7fffcf6eaa08, scene=0x7fffcf323008, view_layer=0x7fffccf88908)
    at /home/zed/programmering/blender_master/blender/source/blender/depsgraph/intern/depsgraph_build.cc:264
#9  0x000055555696b9d1 in BKE_scene_graph_update_tagged (depsgraph=depsgraph@entry=0x7fffe4fbcb08, bmain=bmain@entry=0x7fffcf6eaa08)
    at /home/zed/programmering/blender_master/blender/source/blender/blenkernel/intern/scene.c:1487
#10 0x000055555610e478 in wm_event_do_depsgraph (C=C@entry=0x7fffea058108)
    at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm_event_system.c:341
#11 0x000055555610e515 in wm_event_do_refresh_wm_and_depsgraph (C=C@entry=0x7fffea058108)
    at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm_event_system.c:366
#12 0x0000555556114d5a in wm_event_do_notifiers (C=C@entry=0x7fffea058108)
    at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm_event_system.c:524
#13 0x000055555610ad88 in WM_main (C=0x7fffea058108) at /home/zed/programmering/blender_master/blender/source/blender/windowmanager/intern/wm.c:421
#14 0x00005555560f58e3 in main (argc=1, argv=0x7fffffffdd28) at /home/zed/programmering/blender_master/blender/source/creator/creator.c:505