Blender crash after use console for create 2 derived mesh from the same object using object.to_mesh #64062

New Issue

Pedro A. · 2019-05-01T16:39:57+02:00

Pedro A. commented

2019-05-01 16:39:57 +02:00

System Information
Operating system: Windows-10-10.0.17134 64 Bits
Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 417.35

Blender Version
Broken: version: 2.80 (sub 59), branch: master, commit date: 2019-04-27 10:02, hash: 19ebee657e
Worked: (optional)

Short description of error
Blender crashes after creating 2 mesh of the same object, using object.to_mesh () in the console if we then try to select some of them, as you can see in the attached image.

Exact steps for others to reproduce the error
Open Blender with the default scene.
Go to the workspace 'Scripting'.
Execute the following code in the console:

ob = [o for o in bpy.context.depsgraph.objects if o.type == 'MESH']
mesh = ob[0].to_mesh(bpy.context.depsgraph, apply_modifiers=False, calc_undeformed=False)
mesh = ob[0].to_mesh(bpy.context.depsgraph, apply_modifiers=False, calc_undeformed=False)

Go to the 'Data' context
Display the Browse Mesh Data.. menu
Select any of the created mesh
Blender crash..

**System Information** Operating system: Windows-10-10.0.17134 64 Bits Graphics card: GeForce GTX 1060 6GB/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 417.35 **Blender Version** Broken: version: 2.80 (sub 59), branch: master, commit date: 2019-04-27 10:02, hash: `19ebee657e` Worked: (optional) **Short description of error** Blender crashes after creating 2 mesh of the same object, using `object.to_mesh ()` in the console if we then try to select some of them, as you can see in the attached image. **Exact steps for others to reproduce the error** Open Blender with the default scene. Go to the workspace 'Scripting'. Execute the following code in the console: ``` ob = [o for o in bpy.context.depsgraph.objects if o.type == 'MESH'] mesh = ob[0].to_mesh(bpy.context.depsgraph, apply_modifiers=False, calc_undeformed=False) mesh = ob[0].to_mesh(bpy.context.depsgraph, apply_modifiers=False, calc_undeformed=False) ``` Go to the 'Data' context Display the `Browse Mesh Data..` menu Select any of the created `mesh` Blender crash.. ![bl_crash.png](https://archive.blender.org/developer/F6998958/bl_crash.png)

Pedro A. commented

2019-05-01 16:39:57 +02:00

Added subscriber: @povmaniac

Stefano Bonicatti commented

2019-05-02 14:53:12 +02:00

Added subscriber: @Smjert

Stefano Bonicatti commented

2019-05-02 14:53:12 +02:00

Have that crash too on Linux.
With a Debug build I get an assert (which seems to be the same as for #63747, just a slightly different path):

- 0  0x00007ffff22e382f in raise () from /usr/lib/libc.so.6
- 1  0x00007ffff22ce672 in abort () from /usr/lib/libc.so.6
- 2  0x000055555784e028 in DEG::Depsgraph::add_id_node (this=0x7fffdea35108, id=0x7fffde927a08, id_cow_hint=0x0) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/depsgraph.cc:120
- 3  0x000055555785c35a in DEG::DepsgraphNodeBuilder::add_id_node (this=0x7fffffffdf80, id=0x7fffde927a08) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:169
- 4  0x0000555557860d20 in DEG::DepsgraphNodeBuilder::build_material (this=0x7fffffffdf80, material=0x7fffde927a08) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:1393
- 5  0x000055555785ffb4 in DEG::DepsgraphNodeBuilder::build_object_data_geometry (this=0x7fffffffdf80, object=0x7fffdea4c808, is_object_visible=true)
    at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:1188
#6  0x000055555785dc71 in DEG::DepsgraphNodeBuilder::build_object_data (this=0x7fffffffdf80, object=0x7fffdea4c808, is_object_visible=true)
    at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:656
#7  0x000055555785d840 in DEG::DepsgraphNodeBuilder::build_object (this=0x7fffffffdf80, base_index=0, object=0x7fffdea4c808, linked_state=DEG::DEG_ID_LINKED_DIRECTLY, is_visible=true)
    at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:583
#8  0x0000555557872b71 in DEG::DepsgraphNodeBuilder::build_view_layer (this=0x7fffffffdf80, scene=0x7fffe44ac808, view_layer=0x7fffde97f388, linked_state=DEG::DEG_ID_LINKED_DIRECTLY)
    at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc:108
#9  0x0000555557851f13 in DEG_graph_build_from_view_layer (graph=0x7fffdea35108, bmain=0x7fffdea16008, scene=0x7fffe44ac808, view_layer=0x7fffde97f388)
    at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/depsgraph_build.cc:246
#10 0x00005555578521d8 in DEG_graph_relations_update (graph=0x7fffdea35108, bmain=0x7fffdea16008, scene=0x7fffe44ac808, view_layer=0x7fffde97f388)
    at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/depsgraph_build.cc:308
- 11 0x00005555575f7fb1 in BKE_scene_graph_update_tagged (depsgraph=0x7fffdea35108, bmain=0x7fffdea16008) at /home/smjert/Development/blender-git/blender/source/blender/blenkernel/intern/scene.c:1526
- 12 0x0000555557b481b4 in wm_event_do_depsgraph (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:354
- 13 0x0000555557b482ad in wm_event_do_refresh_wm_and_depsgraph (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:380
- 14 0x0000555557b48aed in wm_event_do_notifiers (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:545
- 15 0x0000555557b43464 in WM_main (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm.c:421
- 16 0x00005555574a9758 in main (argc=1, argv=0x7fffffffe388) at /home/smjert/Development/blender-git/blender/source/creator/creator.c:500

Have that crash too on Linux. With a Debug build I get an assert (which seems to be the same as for #63747, just a slightly different path): ``` - 0 0x00007ffff22e382f in raise () from /usr/lib/libc.so.6 - 1 0x00007ffff22ce672 in abort () from /usr/lib/libc.so.6 - 2 0x000055555784e028 in DEG::Depsgraph::add_id_node (this=0x7fffdea35108, id=0x7fffde927a08, id_cow_hint=0x0) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/depsgraph.cc:120 - 3 0x000055555785c35a in DEG::DepsgraphNodeBuilder::add_id_node (this=0x7fffffffdf80, id=0x7fffde927a08) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:169 - 4 0x0000555557860d20 in DEG::DepsgraphNodeBuilder::build_material (this=0x7fffffffdf80, material=0x7fffde927a08) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:1393 - 5 0x000055555785ffb4 in DEG::DepsgraphNodeBuilder::build_object_data_geometry (this=0x7fffffffdf80, object=0x7fffdea4c808, is_object_visible=true) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:1188 #6 0x000055555785dc71 in DEG::DepsgraphNodeBuilder::build_object_data (this=0x7fffffffdf80, object=0x7fffdea4c808, is_object_visible=true) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:656 #7 0x000055555785d840 in DEG::DepsgraphNodeBuilder::build_object (this=0x7fffffffdf80, base_index=0, object=0x7fffdea4c808, linked_state=DEG::DEG_ID_LINKED_DIRECTLY, is_visible=true) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes.cc:583 #8 0x0000555557872b71 in DEG::DepsgraphNodeBuilder::build_view_layer (this=0x7fffffffdf80, scene=0x7fffe44ac808, view_layer=0x7fffde97f388, linked_state=DEG::DEG_ID_LINKED_DIRECTLY) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/builder/deg_builder_nodes_view_layer.cc:108 #9 0x0000555557851f13 in DEG_graph_build_from_view_layer (graph=0x7fffdea35108, bmain=0x7fffdea16008, scene=0x7fffe44ac808, view_layer=0x7fffde97f388) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/depsgraph_build.cc:246 #10 0x00005555578521d8 in DEG_graph_relations_update (graph=0x7fffdea35108, bmain=0x7fffdea16008, scene=0x7fffe44ac808, view_layer=0x7fffde97f388) at /home/smjert/Development/blender-git/blender/source/blender/depsgraph/intern/depsgraph_build.cc:308 - 11 0x00005555575f7fb1 in BKE_scene_graph_update_tagged (depsgraph=0x7fffdea35108, bmain=0x7fffdea16008) at /home/smjert/Development/blender-git/blender/source/blender/blenkernel/intern/scene.c:1526 - 12 0x0000555557b481b4 in wm_event_do_depsgraph (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:354 - 13 0x0000555557b482ad in wm_event_do_refresh_wm_and_depsgraph (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:380 - 14 0x0000555557b48aed in wm_event_do_notifiers (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:545 - 15 0x0000555557b43464 in WM_main (C=0x7fffe4463208) at /home/smjert/Development/blender-git/blender/source/blender/windowmanager/intern/wm.c:421 - 16 0x00005555574a9758 in main (argc=1, argv=0x7fffffffe388) at /home/smjert/Development/blender-git/blender/source/creator/creator.c:500 ```

Sergey Sharybin was assigned by Sebastian Parborg

2019-05-02 15:04:55 +02:00

Pedro A. commented

2019-05-08 00:14:11 +02:00

Small update.. It also happens if we create only 1 mesh. Tested with last build from :

Small update.. It also happens if we create only 1 mesh. Tested with last build from : ![imagen.png](https://archive.blender.org/developer/F7013788/imagen.png)

Sergey Sharybin commented

2019-05-17 13:09:39 +02:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2019-05-17 13:09:39 +02:00

Sergey Sharybin commented

2019-05-17 13:09:39 +02:00

This issue is now fixed by the new dependency graph API.
Thanks for the report, close.

This issue is now fixed by the new dependency graph API. Thanks for the report, close.

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Blender crash after use console for create 2 derived mesh from the same object using object.to_mesh #64062