Crash calling Mesh.clear_geometry in edit-mode #90972

New Issue

Paul Melis · 2021-08-26T17:58:12+02:00

Paul Melis commented

2021-08-26 17:58:12 +02:00

System Information
Operating system: Arch Linux
Graphics card: GTX 970

Blender Version
Broken: 2.93.1, 2.92.0, 2.83.13

Short description of error

While trying to figure out a workaround for #90798 stumbled upon a segfault apparently caused by a call to bpy.ops.ed.undo() while in edit mode.

Exact steps for others to reproduce the error

$ cat t2.py
import bpy

# Assumes default cube already in the scene
bpy.ops.mesh.primitive_cube_add(location=(1,1,1))
    
bpy.data.objects['Cube'].select_set(True)
bpy.data.objects['Cube.001'].select_set(True)
bpy.context.view_layer.objects.active = bpy.data.objects['Cube']
bpy.ops.object.join()

bpy.ops.object.mode_set(mode = 'EDIT')
bpy.data.objects['Cube'].data.clear_geometry()
bpy.ops.ed.undo()

$ blender -P t2.py 
Read prefs: /home/melis/.config/blender/2.93/config/userpref.blend
Registered Animation Nodes
Traceback (most recent call last):
  File "/home/melis/t2.py", line 15, in <module>
    bpy.ops.ed.undo()
  File "/usr/share/blender/2.93/scripts/modules/bpy/ops.py", line 132, in __call__
    ret = _op_call(self.idname_py(), None, kw)
RuntimeError: Operator bpy.ops.ed.undo.poll() failed, context is incorrect
Writing: /tmp/blender.crash.txt
Segmentation fault (core dumped)

$ cat /tmp/blender.crash.txt 
# Blender 2.93.1, Commit date: 2021-06-22 05:57, Hash 1b8d33b18c2f
bpy.ops.mesh.primitive_cube_add(enter_editmode=False, align='WORLD', location=(1, 1, 1), scale=(1, 1, 1))  # Operator
bpy.ops.object.join()  # Operator
bpy.ops.object.select_all(action='DESELECT')  # Operator
bpy.ops.object.editmode_toggle()  # Operator

# backtrace
blender(BLI_system_backtrace+0x34) [0x5647b1133bb4]
blender(+0xe8fbf0) [0x5647ae9d8bf0]
/usr/lib/libc.so.6(+0x3cda0) [0x7f8fa1a3fda0]
blender(+0x2ef7f9e) [0x5647b0a40f9e]
blender(+0x2ef8401) [0x5647b0a41401]
blender(+0x2ef85e2) [0x5647b0a415e2]
blender(Screen_statusbar_info_call+0x3d) [0x5647af32defd]
blender(RNA_function_call+0x12) [0x5647af223612]
blender(+0x1873053) [0x5647af3bc053]
/usr/lib/libpython3.9.so.1.0(_PyObject_MakeTpCall+0x2e3) [0x7f8fa414f813]
/usr/lib/libpython3.9.so.1.0(_PyEval_EvalFrameDefault+0x52b5) [0x7f8fa414b6f5]
/usr/lib/libpython3.9.so.1.0(_PyFunction_Vectorcall+0x1bb) [0x7f8fa4156e3b]
blender(+0x1873dae) [0x5647af3bcdae]
blender(+0x1813898) [0x5647af35c898]
blender(ED_region_header_layout+0x18f) [0x5647af3d926f]
blender(ED_region_do_layout+0x60) [0x5647af3d7af0]
blender(wm_draw_update+0x447) [0x5647aedcc4a7]
blender(WM_main+0x34) [0x5647aedca1b4]
blender(main+0x370) [0x5647ae9a9420]
/usr/lib/libc.so.6(__libc_start_main+0xd5) [0x7f8fa1a2ab25]
blender(_start+0x2e) [0x5647ae9d4f8e]

# Python backtrace
  File "/usr/share/blender/2.93/scripts/startup/bl_ui/space_statusbar.py", line 46 in draw

GDB backtrace:

- 0  0x00005647b0a40f9e in stats_update ()
- 1  0x00005647b0a41401 in format_stats ()
- 2  0x00005647b0a415e2 in info_statusbar_string ()
- 3  0x00005647af32defd in Screen_statusbar_info_call ()
- 4  0x00005647af223612 in RNA_function_call ()
- 5  0x00005647af3bc053 in pyrna_func_call ()
- 6  0x00007f8fa414f813 in _PyObject_MakeTpCall () at /usr/lib/libpython3.9.so.1.0
- 7  0x00007f8fa414b6f5 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.9.so.1.0
- 8  0x00007f8fa4156e3b in _PyFunction_Vectorcall () at /usr/lib/libpython3.9.so.1.0
- 9  0x00005647af3bcdae in bpy_class_call ()
- 10 0x00005647af35c898 in header_draw ()
- 11 0x00005647af3d926f in ED_region_header_layout ()
- 12 0x00005647af3d7af0 in ED_region_do_layout ()
- 13 0x00005647aedcc4a7 in wm_draw_update ()
- 14 0x00005647aedca1b4 in WM_main ()
- 15 0x00005647ae9a9420 in main ()

**System Information** Operating system: Arch Linux Graphics card: GTX 970 **Blender Version** Broken: 2.93.1, 2.92.0, 2.83.13 **Short description of error** While trying to figure out a workaround for #90798 stumbled upon a segfault apparently caused by a call to `bpy.ops.ed.undo()` while in edit mode. **Exact steps for others to reproduce the error** ``` $ cat t2.py import bpy # Assumes default cube already in the scene bpy.ops.mesh.primitive_cube_add(location=(1,1,1)) bpy.data.objects['Cube'].select_set(True) bpy.data.objects['Cube.001'].select_set(True) bpy.context.view_layer.objects.active = bpy.data.objects['Cube'] bpy.ops.object.join() bpy.ops.object.mode_set(mode = 'EDIT') bpy.data.objects['Cube'].data.clear_geometry() bpy.ops.ed.undo() $ blender -P t2.py Read prefs: /home/melis/.config/blender/2.93/config/userpref.blend Registered Animation Nodes Traceback (most recent call last): File "/home/melis/t2.py", line 15, in <module> bpy.ops.ed.undo() File "/usr/share/blender/2.93/scripts/modules/bpy/ops.py", line 132, in __call__ ret = _op_call(self.idname_py(), None, kw) RuntimeError: Operator bpy.ops.ed.undo.poll() failed, context is incorrect Writing: /tmp/blender.crash.txt Segmentation fault (core dumped) $ cat /tmp/blender.crash.txt # Blender 2.93.1, Commit date: 2021-06-22 05:57, Hash 1b8d33b18c2f bpy.ops.mesh.primitive_cube_add(enter_editmode=False, align='WORLD', location=(1, 1, 1), scale=(1, 1, 1)) # Operator bpy.ops.object.join() # Operator bpy.ops.object.select_all(action='DESELECT') # Operator bpy.ops.object.editmode_toggle() # Operator # backtrace blender(BLI_system_backtrace+0x34) [0x5647b1133bb4] blender(+0xe8fbf0) [0x5647ae9d8bf0] /usr/lib/libc.so.6(+0x3cda0) [0x7f8fa1a3fda0] blender(+0x2ef7f9e) [0x5647b0a40f9e] blender(+0x2ef8401) [0x5647b0a41401] blender(+0x2ef85e2) [0x5647b0a415e2] blender(Screen_statusbar_info_call+0x3d) [0x5647af32defd] blender(RNA_function_call+0x12) [0x5647af223612] blender(+0x1873053) [0x5647af3bc053] /usr/lib/libpython3.9.so.1.0(_PyObject_MakeTpCall+0x2e3) [0x7f8fa414f813] /usr/lib/libpython3.9.so.1.0(_PyEval_EvalFrameDefault+0x52b5) [0x7f8fa414b6f5] /usr/lib/libpython3.9.so.1.0(_PyFunction_Vectorcall+0x1bb) [0x7f8fa4156e3b] blender(+0x1873dae) [0x5647af3bcdae] blender(+0x1813898) [0x5647af35c898] blender(ED_region_header_layout+0x18f) [0x5647af3d926f] blender(ED_region_do_layout+0x60) [0x5647af3d7af0] blender(wm_draw_update+0x447) [0x5647aedcc4a7] blender(WM_main+0x34) [0x5647aedca1b4] blender(main+0x370) [0x5647ae9a9420] /usr/lib/libc.so.6(__libc_start_main+0xd5) [0x7f8fa1a2ab25] blender(_start+0x2e) [0x5647ae9d4f8e] # Python backtrace File "/usr/share/blender/2.93/scripts/startup/bl_ui/space_statusbar.py", line 46 in draw ``` GDB backtrace: ``` - 0 0x00005647b0a40f9e in stats_update () - 1 0x00005647b0a41401 in format_stats () - 2 0x00005647b0a415e2 in info_statusbar_string () - 3 0x00005647af32defd in Screen_statusbar_info_call () - 4 0x00005647af223612 in RNA_function_call () - 5 0x00005647af3bc053 in pyrna_func_call () - 6 0x00007f8fa414f813 in _PyObject_MakeTpCall () at /usr/lib/libpython3.9.so.1.0 - 7 0x00007f8fa414b6f5 in _PyEval_EvalFrameDefault () at /usr/lib/libpython3.9.so.1.0 - 8 0x00007f8fa4156e3b in _PyFunction_Vectorcall () at /usr/lib/libpython3.9.so.1.0 - 9 0x00005647af3bcdae in bpy_class_call () - 10 0x00005647af35c898 in header_draw () - 11 0x00005647af3d926f in ED_region_header_layout () - 12 0x00005647af3d7af0 in ED_region_do_layout () - 13 0x00005647aedcc4a7 in wm_draw_update () - 14 0x00005647aedca1b4 in WM_main () - 15 0x00005647ae9a9420 in main () ```

Paul Melis commented

2021-08-26 17:58:12 +02:00

Added subscriber: @PaulMelis

Robert Guetzkow commented

2021-08-26 21:13:40 +02:00

Added subscriber: @rjg

Robert Guetzkow commented

2021-08-26 21:13:40 +02:00

This crash only seems to happen when Blender is started with the script from CLI, executing it it from the Scripting workspace doesn't result in the crash.

Blender master branch:

****
## 4396==ERROR: AddressSanitizer: access-violation on unknown address 0x000000000058 (pc 0x7ff6a1ed430a bp 0x129410d740c0 sp 0x00bbad1fc910 T0)
## 4396==The signal is caused by a READ memory access.
## 4396==Hint: address points to the zero page.
    - 0 0x7ff6a1ed4309 in ui_but_value_get Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2517
    - 1 0x7ff6a1edc7ce in ui_but_is_pushed_ex Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2140
    - 2 0x7ff6a1eead4d in ui_but_update_select_flag Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2225
    - 3 0x7ff6a1eed349 in ui_but_update_ex Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:3684
    - 4 0x7ff6a1edb300 in ui_but_update Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:3853
    - 5 0x7ff6a1ef1bdd in ui_but_update_and_icon_set Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:4904
    - 6 0x7ff6a1ec7814 in uiDefIconBut Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:5286
    - 7 0x7ff6a1ef1df7 in uiDefIconButBit Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:5309
    - 8 0x7ff6a1ec7d8f in uiDefIconButBitS Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:5495
    - 9 0x7ff6a24f7750 in uiTemplateEditModeSelection Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\space_view3d\view3d_header.c:143
    - 10 0x7ff6a24f7543 in uiTemplateHeader3D_mode Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\space_view3d\view3d_header.c:234
    - 11 0x7ff6a0bce12d in UILayout_template_header_3D_mode_call Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\source\blender\makesrna\intern\rna_ui_gen.c:3477
    - 12 0x7ff6a053e3b8 in RNA_function_call Z:\01_git\01_contribution\blender-git\blender\source\blender\makesrna\intern\rna_access.c:7618
    - 13 0x7ff6a0e67a52 in pyrna_func_call Z:\01_git\01_contribution\blender-git\blender\source\blender\python\intern\bpy_rna.c:6446
    - 14 0x7ff9439164d6 in PyErr_SyntaxLocationEx+0x282cdb (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x1802864d6)
    - 15 0x7ff943bccbb9 in PyErr_SyntaxLocationEx+0x5393be (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053cbb9)
    - 16 0x7ff943bcd1d1 in PyErr_SyntaxLocationEx+0x5399d6 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053d1d1)
    - 17 0x7ff943bc8465 in PyErr_SyntaxLocationEx+0x534c6a (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180538465)
    - 18 0x7ff943917866 in PyErr_SyntaxLocationEx+0x28406b (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180287866)
    - 19 0x7ff94391448b in PyErr_SyntaxLocationEx+0x280c90 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18028448b)
    - 20 0x7ff943bccbc9 in PyErr_SyntaxLocationEx+0x5393ce (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053cbc9)
    - 21 0x7ff943bcd1d1 in PyErr_SyntaxLocationEx+0x5399d6 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053d1d1)
    - 22 0x7ff943bc4053 in PyErr_SyntaxLocationEx+0x530858 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180534053)
    - 23 0x7ff943bc1b79 in PyErr_SyntaxLocationEx+0x52e37e (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180531b79)
    - 24 0x7ff943914945 in PyErr_SyntaxLocationEx+0x28114a (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180284945)
    - 25 0x7ff943913e79 in PyErr_SyntaxLocationEx+0x28067e (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180283e79)
    - 26 0x7ff943914c82 in PyErr_SyntaxLocationEx+0x281487 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180284c82)
    - 27 0x7ff943913347 in PyErr_SyntaxLocationEx+0x27fb4c (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180283347)
    - 28 0x7ff6a0e6cdd4 in bpy_class_call Z:\01_git\01_contribution\blender-git\blender\source\blender\python\intern\bpy_rna.c:8699
    - 29 0x7ff6a0bb3b01 in header_draw Z:\01_git\01_contribution\blender-git\blender\source\blender\makesrna\intern\rna_ui.c:762
    - 30 0x7ff6a0f04769 in ED_region_header_layout Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\screen\area.c:3294
    - 31 0x7ff6a0f041cc in ED_region_header Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\screen\area.c:3361
    - 32 0x7ff6a24f434c in view3d_header_region_draw Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\space_view3d\space_view3d.c:1211
    - 33 0x7ff6a0effc54 in ED_region_do_draw Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\screen\area.c:564
    - 34 0x7ff69f01d021 in wm_draw_window_offscreen Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_draw.c:728
    - 35 0x7ff69f01d9b4 in wm_draw_window Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_draw.c:877
    - 36 0x7ff69f0182ec in wm_draw_update Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_draw.c:1078
    - 37 0x7ff69efb7a85 in ghost_event_proc Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_window.c:1351
    - 38 0x7ff6a2a1fccf in GHOST_CallbackEventConsumer::processEvent Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_CallbackEventConsumer.cpp:41
    - 39 0x7ff6a2aa4f93 in GHOST_EventManager::dispatchEvent Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_EventManager.cpp:84
    - 40 0x7ff6a2aa518c in GHOST_EventManager::dispatchEvent Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_EventManager.cpp:94
    - 41 0x7ff6a2aa5202 in GHOST_EventManager::dispatchEvents Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_EventManager.cpp:100
    - 42 0x7ff6a2ab9db7 in GHOST_System::dispatchEvents Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_System.cpp:218
    - 43 0x7ff6a29e4a87 in GHOST_DispatchEvents Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_C-api.cpp:263
    - 44 0x7ff69efb1b6e in wm_window_process_events Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_window.c:1557
    - 45 0x7ff69ef904e3 in WM_main Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm.c:645
    - 46 0x7ff69dc4e476 in main Z:\01_git\01_contribution\blender-git\blender\source\creator\creator.c:558
    - 47 0x7ff6abd507b8 in invoke_main d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78
    - 48 0x7ff6abd5070d in __scrt_common_main_seh d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288
    - 49 0x7ff6abd505cd in __scrt_common_main d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:330
    - 50 0x7ff6abd5082d in mainCRTStartup d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_main.cpp:16
    - 51 0x7ff995ea7033 in BaseThreadInitThunk+0x13 (C:\WINDOWS\System32\KERNEL32.dll+0x180017033)
    #52 0x7ff996062650 in RtlUserThreadStart+0x20 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x180052650)

AddressSanitizer can not provide additional info.
SUMMARY: AddressSanitizer: access-violation Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2517 in ui_but_value_get
## 4396==ABORTING

The undo call doesn't appear to be the issue. It's the clear_geometry() that seems to cause the problem.

This crash only seems to happen when Blender is started with the script from CLI, executing it it from the Scripting workspace doesn't result in the crash. Blender master branch: ```lines **** ## 4396==ERROR: AddressSanitizer: access-violation on unknown address 0x000000000058 (pc 0x7ff6a1ed430a bp 0x129410d740c0 sp 0x00bbad1fc910 T0) ## 4396==The signal is caused by a READ memory access. ## 4396==Hint: address points to the zero page. - 0 0x7ff6a1ed4309 in ui_but_value_get Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2517 - 1 0x7ff6a1edc7ce in ui_but_is_pushed_ex Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2140 - 2 0x7ff6a1eead4d in ui_but_update_select_flag Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2225 - 3 0x7ff6a1eed349 in ui_but_update_ex Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:3684 - 4 0x7ff6a1edb300 in ui_but_update Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:3853 - 5 0x7ff6a1ef1bdd in ui_but_update_and_icon_set Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:4904 - 6 0x7ff6a1ec7814 in uiDefIconBut Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:5286 - 7 0x7ff6a1ef1df7 in uiDefIconButBit Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:5309 - 8 0x7ff6a1ec7d8f in uiDefIconButBitS Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:5495 - 9 0x7ff6a24f7750 in uiTemplateEditModeSelection Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\space_view3d\view3d_header.c:143 - 10 0x7ff6a24f7543 in uiTemplateHeader3D_mode Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\space_view3d\view3d_header.c:234 - 11 0x7ff6a0bce12d in UILayout_template_header_3D_mode_call Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\source\blender\makesrna\intern\rna_ui_gen.c:3477 - 12 0x7ff6a053e3b8 in RNA_function_call Z:\01_git\01_contribution\blender-git\blender\source\blender\makesrna\intern\rna_access.c:7618 - 13 0x7ff6a0e67a52 in pyrna_func_call Z:\01_git\01_contribution\blender-git\blender\source\blender\python\intern\bpy_rna.c:6446 - 14 0x7ff9439164d6 in PyErr_SyntaxLocationEx+0x282cdb (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x1802864d6) - 15 0x7ff943bccbb9 in PyErr_SyntaxLocationEx+0x5393be (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053cbb9) - 16 0x7ff943bcd1d1 in PyErr_SyntaxLocationEx+0x5399d6 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053d1d1) - 17 0x7ff943bc8465 in PyErr_SyntaxLocationEx+0x534c6a (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180538465) - 18 0x7ff943917866 in PyErr_SyntaxLocationEx+0x28406b (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180287866) - 19 0x7ff94391448b in PyErr_SyntaxLocationEx+0x280c90 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18028448b) - 20 0x7ff943bccbc9 in PyErr_SyntaxLocationEx+0x5393ce (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053cbc9) - 21 0x7ff943bcd1d1 in PyErr_SyntaxLocationEx+0x5399d6 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x18053d1d1) - 22 0x7ff943bc4053 in PyErr_SyntaxLocationEx+0x530858 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180534053) - 23 0x7ff943bc1b79 in PyErr_SyntaxLocationEx+0x52e37e (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180531b79) - 24 0x7ff943914945 in PyErr_SyntaxLocationEx+0x28114a (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180284945) - 25 0x7ff943913e79 in PyErr_SyntaxLocationEx+0x28067e (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180283e79) - 26 0x7ff943914c82 in PyErr_SyntaxLocationEx+0x281487 (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180284c82) - 27 0x7ff943913347 in PyErr_SyntaxLocationEx+0x27fb4c (Z:\01_git\01_contribution\blender-git\build_windows_Full_x64_vc16_Debug\bin\Debug\python39_d.dll+0x180283347) - 28 0x7ff6a0e6cdd4 in bpy_class_call Z:\01_git\01_contribution\blender-git\blender\source\blender\python\intern\bpy_rna.c:8699 - 29 0x7ff6a0bb3b01 in header_draw Z:\01_git\01_contribution\blender-git\blender\source\blender\makesrna\intern\rna_ui.c:762 - 30 0x7ff6a0f04769 in ED_region_header_layout Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\screen\area.c:3294 - 31 0x7ff6a0f041cc in ED_region_header Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\screen\area.c:3361 - 32 0x7ff6a24f434c in view3d_header_region_draw Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\space_view3d\space_view3d.c:1211 - 33 0x7ff6a0effc54 in ED_region_do_draw Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\screen\area.c:564 - 34 0x7ff69f01d021 in wm_draw_window_offscreen Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_draw.c:728 - 35 0x7ff69f01d9b4 in wm_draw_window Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_draw.c:877 - 36 0x7ff69f0182ec in wm_draw_update Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_draw.c:1078 - 37 0x7ff69efb7a85 in ghost_event_proc Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_window.c:1351 - 38 0x7ff6a2a1fccf in GHOST_CallbackEventConsumer::processEvent Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_CallbackEventConsumer.cpp:41 - 39 0x7ff6a2aa4f93 in GHOST_EventManager::dispatchEvent Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_EventManager.cpp:84 - 40 0x7ff6a2aa518c in GHOST_EventManager::dispatchEvent Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_EventManager.cpp:94 - 41 0x7ff6a2aa5202 in GHOST_EventManager::dispatchEvents Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_EventManager.cpp:100 - 42 0x7ff6a2ab9db7 in GHOST_System::dispatchEvents Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_System.cpp:218 - 43 0x7ff6a29e4a87 in GHOST_DispatchEvents Z:\01_git\01_contribution\blender-git\blender\intern\ghost\intern\GHOST_C-api.cpp:263 - 44 0x7ff69efb1b6e in wm_window_process_events Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm_window.c:1557 - 45 0x7ff69ef904e3 in WM_main Z:\01_git\01_contribution\blender-git\blender\source\blender\windowmanager\intern\wm.c:645 - 46 0x7ff69dc4e476 in main Z:\01_git\01_contribution\blender-git\blender\source\creator\creator.c:558 - 47 0x7ff6abd507b8 in invoke_main d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:78 - 48 0x7ff6abd5070d in __scrt_common_main_seh d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:288 - 49 0x7ff6abd505cd in __scrt_common_main d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_common.inl:330 - 50 0x7ff6abd5082d in mainCRTStartup d:\agent\_work\4\s\src\vctools\crt\vcstartup\src\startup\exe_main.cpp:16 - 51 0x7ff995ea7033 in BaseThreadInitThunk+0x13 (C:\WINDOWS\System32\KERNEL32.dll+0x180017033) #52 0x7ff996062650 in RtlUserThreadStart+0x20 (C:\WINDOWS\SYSTEM32\ntdll.dll+0x180052650) AddressSanitizer can not provide additional info. SUMMARY: AddressSanitizer: access-violation Z:\01_git\01_contribution\blender-git\blender\source\blender\editors\interface\interface.c:2517 in ui_but_value_get ## 4396==ABORTING ``` The undo call doesn't appear to be the issue. It's the `clear_geometry()` that seems to cause the problem.

Pratik Borhade commented

2021-08-27 07:37:51 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-08-27 07:37:51 +02:00

Commit should fix the issue (I think): 1b7c361fbb

I did not receive crash when running blender from CMD (without GUI)

Commit should fix the issue (I think): 1b7c361fbb I did not receive crash when running blender from CMD (without GUI)

Philipp Oeser commented

2021-09-01 09:26:44 +02:00

Added subscribers: @ideasman42, @lichtwerk

Philipp Oeser commented

2021-09-01 09:26:44 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Philipp Oeser commented

2021-09-01 09:26:44 +02:00

I can confirm here.

However, this is somewhat expected. Let me explain:

In #90972#1212294, @PratikPB2123 wrote:
Commit should fix the issue (I think): 1b7c361fbb

In blender/blender-addons#60934#615703, @ideasman42 wrote:
Committed basic undo system support in background mode: 3d16a268ee

You'll need to perform an undo push explicitly to initialize undo, afterwards you can use undo to restore the state.

So 3d16a268ee should have brought basic support for undo in background mode back.
But it also advises to do a "manual" undo push here to make it work properly. Doing so will get rid of the crash.
(i can also imagine this is specifically problematic, because clear_geometry() is not an operator that has an undo push for itself, but a mesh RNA function without undo push)

Sooo, doing it with this script, I dont get crashes anymore:

import bpy

# Assumes default cube already in the scene
bpy.ops.mesh.primitive_cube_add(location=(1,1,1))
    
bpy.data.objects['Cube'].select_set(True)
bpy.data.objects['Cube.001'].select_set(True)
bpy.context.view_layer.objects.active = bpy.data.objects['Cube']
bpy.ops.object.join()

bpy.ops.object.mode_set(mode = 'EDIT')
bpy.ops.ed.undo_push(message='Add an undo step')
bpy.data.objects['Cube'].data.clear_geometry()
bpy.ops.ed.undo()

@PaulMelis: does this work for you?

I can confirm here. However, this is somewhat expected. Let me explain: > In #90972#1212294, @PratikPB2123 wrote: > Commit should fix the issue (I think): 1b7c361fbb > In blender/blender-addons#60934#615703, @ideasman42 wrote: > Committed basic undo system support in background mode: 3d16a268ee > > You'll need to perform an undo push explicitly to initialize undo, afterwards you can use undo to restore the state. So 3d16a268ee should have brought basic support for undo in background mode back. But it also advises to do a "manual" undo push here to make it work properly. Doing so will get rid of the crash. (i can also imagine this is specifically problematic, because `clear_geometry()` is not an operator that has an undo push for itself, but a mesh RNA function without undo push) Sooo, doing it with this script, I dont get crashes anymore: ``` import bpy # Assumes default cube already in the scene bpy.ops.mesh.primitive_cube_add(location=(1,1,1)) bpy.data.objects['Cube'].select_set(True) bpy.data.objects['Cube.001'].select_set(True) bpy.context.view_layer.objects.active = bpy.data.objects['Cube'] bpy.ops.object.join() bpy.ops.object.mode_set(mode = 'EDIT') bpy.ops.ed.undo_push(message='Add an undo step') bpy.data.objects['Cube'].data.clear_geometry() bpy.ops.ed.undo() ``` @PaulMelis: does this work for you?

Paul Melis commented

2021-09-01 09:34:32 +02:00

Well, that indeed doesn't crash. However, I had already found another workaround, but thanks anyway!

Philipp Oeser commented

2021-09-01 09:51:38 +02:00

Changed status from 'Needs User Info' to: 'Archived'

Philipp Oeser closed this issue

2021-09-01 09:51:38 +02:00

Philipp Oeser commented

2021-09-01 09:51:38 +02:00

In #90972#1214572, @PaulMelis wrote:
Well, that indeed doesn't crash. However, I had already found another workaround, but thanks anyway!

Will close then.
Out of curiosity : which workaround did you use?

> In #90972#1214572, @PaulMelis wrote: > Well, that indeed doesn't crash. However, I had already found another workaround, but thanks anyway! Will close then. Out of curiosity : which workaround did you use?

Paul Melis commented

2021-09-01 09:53:17 +02:00

See https://developer.blender.org/T90798:

bm = bmesh.new()
bm.from_mesh(msh)
bm.to_mesh(msh)
bm.free()

This makes sure the loop triangles are flagged to be recomputed, which is what I needed (as glTF export was broken for our scene)

See https://developer.blender.org/T90798: ``` bm = bmesh.new() bm.from_mesh(msh) bm.to_mesh(msh) bm.free() ``` This makes sure the loop triangles are flagged to be recomputed, which is what I needed (as glTF export was broken for our scene)

Campbell Barton changed title from ~~Segfault when calling bpy.ops.ed.undo()~~ to Crash calling Mesh.clear_geometry in edit-mode

2021-09-02 07:24:08 +02:00

Campbell Barton self-assigned this 2021-09-02 07:24:34 +02:00

Campbell Barton commented

2021-09-02 07:24:34 +02:00

Changed status from 'Archived' to: 'Confirmed'

Campbell Barton reopened this issue

2021-09-02 07:24:34 +02:00

Campbell Barton commented

2021-09-02 07:24:34 +02:00

This crash also happens when undo isn't called.