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Blender crashes after deleting vertices with Custom Normals
Closed, ResolvedPublicBUG


System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: Quadro K420/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 390.77

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-08 20:30, hash: rB31bc76ea4e4b
Worked: official 2.83 release

Short description of error
Blender crashes after deleting vertices.

Exact steps for others to reproduce the error
The crashing blend file

Cut the left part (cut through on) and delete vertices on the right side of the cut (images 1,2). Cut the right part and when trying to delete the vertices on the left of the cut blender crashes. For some reason the exact order of the steps is important else blender doesn't crash.

Event Timeline

Philipp Oeser (lichtwerk) changed the task status from Needs Triage to Confirmed.Jul 9 2020, 4:53 PM
Philipp Oeser (lichtwerk) triaged this task as High priority.
Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Bug".

Probably caused by rB93c8955a722b: Mesh Edit: preserve Custom Normal vectors in topology operators.

MLoopNorSpace is NULL here

1  copy_v3_v3                             math_vector_inline.c 63    0x2fd8acf 
2  BKE_lnor_space_custom_data_to_normal   mesh_evaluate.c      697   0x2fdb08b 
3  BM_custom_loop_normals_to_vector_layer bmesh_mesh.c         1921  0x34a33bf 
4  edbm_delete_exec                       editmesh_tools.c     454   0x3cc6063 
5  wm_operator_invoke                     wm_event_system.c    1296  0x338209b 
6  wm_operator_call_internal              wm_event_system.c    1498  0x3382722 
7  WM_operator_name_call_ptr              wm_event_system.c    1546  0x338294c 
8  ui_apply_but_funcs_after               interface_handlers.c 902   0x3efc90c 
9  ui_popup_handler                       interface_handlers.c 10878 0x3f177a6 
10 wm_handler_ui_call                     wm_event_system.c    622   0x33805b5 
11 wm_handlers_do_intern                  wm_event_system.c    2743  0x3385cf0 
12 wm_handlers_do                         wm_event_system.c    2854  0x338611c 
13 wm_event_do_handlers                   wm_event_system.c    3283  0x3387483 
14 WM_main                                wm.c                 475   0x337b77f 
15 main                                   creator.c            532   0x2f3dcae

CC @Alexander Gavrilov (angavrilov)
CC @Bastien Montagne (mont29)

Philipp Oeser (lichtwerk) renamed this task from Blender crashes after deleting vertices to Blender crashes after deleting vertices with Custom Normals.Jul 9 2020, 4:54 PM