"Edit Mesh: partial updates" related crash in add-on #89289

New Issue

MaybeLamia · 2021-06-19T16:31:57+02:00

MaybeLamia commented

2021-06-19 16:31:57 +02:00

System Information
Operating system: Windows-10-10.0.19041-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 780 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-06-18 21:33, hash: f9aea19d98

Caused by c2fa36999f

Short description of error
Using an the operation connect spread in an addon is causing an EXCEPTION_ACCESS_VIOLATION.

blender.crash.txt

Stack trace:
blender.exe         :0x00007FF7A109EC60  blender::deg::deg_graph_flush_updates
blender.exe         :0x00007FF7A1084AA0  DEG_evaluate_on_refresh
blender.exe         :0x00007FF79C983790  scene_graph_update_tagged
blender.exe         :0x00007FF79CB61510  wm_event_do_notifiers
blender.exe         :0x00007FF79CB4B550  WM_main
blender.exe         :0x00007FF79C7E2ED0  main
blender.exe         :0x00007FF7A16421A8  __scrt_common_main_seh
KERNEL32.DLL        :0x00007FFEEB937020  BaseThreadInitThunk
ntdll.dll           :0x00007FFEECA62630  RtlUserThreadStart

Exact steps for others to reproduce the error

Download Forgotten Tools
use Connect spread on 2+ edges
go to operation popup menu increase the cuts.

**System Information** Operating system: Windows-10-10.0.19041-SP0 64 Bits Graphics card: NVIDIA GeForce GTX 780 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 466.27 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-06-18 21:33, hash: `f9aea19d98` Caused by c2fa36999f **Short description of error** Using an the operation connect spread in an addon is causing an EXCEPTION_ACCESS_VIOLATION. [blender.crash.txt](https://archive.blender.org/developer/F10181562/blender.crash.txt) ``` Stack trace: blender.exe :0x00007FF7A109EC60 blender::deg::deg_graph_flush_updates blender.exe :0x00007FF7A1084AA0 DEG_evaluate_on_refresh blender.exe :0x00007FF79C983790 scene_graph_update_tagged blender.exe :0x00007FF79CB61510 wm_event_do_notifiers blender.exe :0x00007FF79CB4B550 WM_main blender.exe :0x00007FF79C7E2ED0 main blender.exe :0x00007FF7A16421A8 __scrt_common_main_seh KERNEL32.DLL :0x00007FFEEB937020 BaseThreadInitThunk ntdll.dll :0x00007FFEECA62630 RtlUserThreadStart ``` <video src="https://archive.blender.org/developer/F10181567/2021-06-20_00-26-23.mp4" controls></video> **Exact steps for others to reproduce the error** - Download [Forgotten Tools ](https://dl.dropbox.com/s/adovx8xpfm2xdds/forgotten_tools_0_5_0.zip) - use Connect spread on 2+ edges - go to operation popup menu increase the cuts.

MaybeLamia commented

2021-06-19 16:31:57 +02:00

Added subscriber: @MaybeLamia

Fen commented

2021-06-19 19:30:08 +02:00

Added subscriber: @chemicalcrux

Fen commented

2021-06-19 19:30:08 +02:00

Changed status from 'Needs Triage' to: 'Confirmed'

Fen commented

2021-06-19 19:30:08 +02:00

Running this with a debug build fails an assertion:

BLI_assert failed: D:\blender-git\blender\source\blender\blenkernel\intern\editmesh.c:182, BKE_editmesh_looptri_calc_with_partial_ex(), at 'em->tottri == poly_to_tri_count(em->bm->totface, em->bm->totloop)'

If I get rid of the asserts, a heap overflow occurs.

SUMMARY: AddressSanitizer: heap-buffer-overflow D:\blender-git\blender\source\blender\bmesh\intern\bmesh_mesh_tessellate.c:145 in bmesh_calc_tessellation_for_face_impl
Shadow bytes around the buggy address:
  0x051d4f4d1f10: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x051d4f4d1f20: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd
  0x051d4f4d1f30: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa
  0x051d4f4d1f40: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x051d4f4d1f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x051d4f4d1f60: 00 00 00 00 00 00 00 00 00 00 00 00 00[fa]fa fa
  0x051d4f4d1f70: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
  0x051d4f4d1f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
  0x051d4f4d1f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa
  0x051d4f4d1fa0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd
  0x051d4f4d1fb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd

Running this with a debug build fails an assertion: ``` BLI_assert failed: D:\blender-git\blender\source\blender\blenkernel\intern\editmesh.c:182, BKE_editmesh_looptri_calc_with_partial_ex(), at 'em->tottri == poly_to_tri_count(em->bm->totface, em->bm->totloop)' ``` If I get rid of the asserts, a heap overflow occurs. ``` SUMMARY: AddressSanitizer: heap-buffer-overflow D:\blender-git\blender\source\blender\bmesh\intern\bmesh_mesh_tessellate.c:145 in bmesh_calc_tessellation_for_face_impl Shadow bytes around the buggy address: 0x051d4f4d1f10: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd 0x051d4f4d1f20: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd 0x051d4f4d1f30: fd fd fd fd fd fd fd fd fd fd fd fd fd fa fa fa 0x051d4f4d1f40: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x051d4f4d1f50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 =>0x051d4f4d1f60: 00 00 00 00 00 00 00 00 00 00 00 00 00[fa]fa fa 0x051d4f4d1f70: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00 0x051d4f4d1f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 0x051d4f4d1f90: 00 00 00 00 00 00 00 00 00 00 00 00 00 fa fa fa 0x051d4f4d1fa0: fa fa fa fa fa fa fa fa fd fd fd fd fd fd fd fd 0x051d4f4d1fb0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd ```

Fen commented

2021-06-19 19:47:05 +02:00

This was introduced in c2fa36999f. The commit before it, 00073651d4, does not cause an assertion failure or a crash.

It is possible that this is just a problem with the add-on, of course -- it could be holding onto old, invalid data.

This was introduced in c2fa36999f. The commit before it, 00073651d4, does not cause an assertion failure or a crash. It is possible that this is just a problem with the add-on, of course -- it could be holding onto old, invalid data.

Robert Guetzkow changed title from ~~EXCEPTION_ACCESS_VIOLATION from addon.~~ to BMesh tesselate related crash in add-on

2021-06-19 20:08:58 +02:00

Robert Guetzkow changed title from ~~BMesh tesselate related crash in add-on~~ to Mesh related crash in add-on

2021-06-19 20:09:25 +02:00

Philipp Oeser removed the

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

"Edit Mesh: partial updates" related crash in add-on #89289