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Regression: Modifiers: Crash when adding Weighted Normal to large mesh #108867

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opened 2023-06-11 21:13:58 +02:00 by Pavel Duong · 9 comments
Pavel Duong commented 2023-06-11 21:13:58 +02:00
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System Information
Operating system: Arch Linux
Graphics card: AMD ATI Radeon 680M

Blender Version
Broken: d79524e309 (3.6 release at the time of writing), da43c42e40 (earliest 3.6 from Builder that crashes)
Worked: 3.4, 3.6 Alpha (521e79b869, bb51cdedb7), 4.0 (b7b2e08dcb seems to be working)

Short description of error

Blender crashes instantly when adding WeightedNormal to a mesh.

Below I am appending a gdb backtrace on a RelWithDebugInfo build:

Thread 1 "blender-target" received signal SIGSEGV, Segmentation fault.
apply_weights_vertex_normal (wnmd=wnmd@entry=0x7fff88e9da88, wn_data=wn_data@entry=0x7fffffffc990)
    at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/BLI_array.hh:191
191       T &operator[](int64_t index)
(gdb) bt
#0  apply_weights_vertex_normal (wnmd=wnmd@entry=0x7fff88e9da88, wn_data=wn_data@entry=0x7fffffffc990)
    at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/BLI_array.hh:191
#1  0x000000000128e0aa in wn_face_area (wn_data=0x7fffffffc990, wnmd=0x7fff88e9da88)
    at /home/vignette/Git/blender-build-env/blender/source/blender/modifiers/intern/MOD_weighted_normal.cc:405
#2  modifyMesh (md=0x7fff88e9da88, ctx=<optimized out>, mesh=<optimized out>)
    at /home/vignette/Git/blender-build-env/blender/source/blender/modifiers/intern/MOD_weighted_normal.cc:578
#3  0x0000000000d3b8aa in mesh_calc_modifiers (depsgraph=depsgraph@entry=0x7fffa4246c08, scene=0x7fffdea8a008, ob=ob@entry=0x7fff980bbe08, 
    use_deform=use_deform@entry=true, need_mapping=false, dataMask=dataMask@entry=0x7fffffffd2f0, use_cache=true, allow_shared_mesh=true, 
    r_deform=0x7fffffffd288, r_final=0x7fffffffd280, r_geometry_set=0x7fffffffd290)
    at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/DerivedMesh.cc:875
#4  0x0000000000d3c2ec in mesh_build_data (depsgraph=0x7fffa4246c08, scene=<optimized out>, ob=0x7fff980bbe08, dataMask=0x7fffffffd2f0, 
    need_mapping=<optimized out>) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/DerivedMesh.cc:1461
#5  0x0000000000d3c517 in makeDerivedMesh (depsgraph=0x7fffa4246c08, scene=0x7fffdea8a008, ob=0x7fff980bbe08, dataMask=<optimized out>)
    at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/DerivedMesh.cc:1642
#6  0x00000000009cb7eb in BKE_object_handle_data_update (depsgraph=depsgraph@entry=0x7fffa4246c08, scene=scene@entry=0x7fffdea8a008, 
    ob=ob@entry=0x7fff980bbe08) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/object_update.cc:162
#7  0x00000000009cbd2e in BKE_object_eval_uber_data (depsgraph=0x7fffa4246c08, scene=0x7fffdea8a008, ob=0x7fff980bbe08)
    at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/object_update.cc:328
#8  0x00000000010a3a11 in std::function<void (Depsgraph*)>::operator()(Depsgraph*) const (__args#0=<optimized out>, this=0x7fffde9fdac0)
    at /usr/lib/gcc/x86_64-pc-linux-gnu/12.3.0/include/c++/bits/std_function.h:591
#9  blender::deg::(anonymous namespace)::evaluate_node (operation_node=operation_node@entry=0x7fffde9fda08, state=0x7fffffffd650)
    at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:101
#10 0x00000000010a3c4b in blender::deg::(anonymous namespace)::deg_task_run_func (pool=<optimized out>, taskdata=0x7fffde9fda08)
    at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:118
#11 0x00000000084b919d in tbb::internal::function_task<Task>::execute (this=<optimized out>)
    at /home/vignette/Git/blender-build-env/lib/linux_x86_64_glibc_228/tbb/include/tbb/task.h:1059
#12 0x00007ffff7f52b45 in tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::process_bypass_loop(tbb::internal::context_guard_helper<false>&, tbb::task*, long) () from /home/vignette/Git/blender-build-env/build/bin/lib/libtbb.so.2
#13 0x00007ffff7f52e78 in tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::local_wait_for_all(tbb::task&, tbb::task*) ()
   from /home/vignette/Git/blender-build-env/build/bin/lib/libtbb.so.2
#14 0x00000000084b8f48 in tbb::task::wait_for_all (this=<optimized out>)
    at /home/vignette/Git/blender-build-env/lib/linux_x86_64_glibc_228/tbb/include/tbb/task.h:820
#15 tbb::internal::task_group_base::wait (this=0x7fff88e770c0)
    at /home/vignette/Git/blender-build-env/lib/linux_x86_64_glibc_228/tbb/include/tbb/task_group.h:168
#16 tbb_task_pool_work_and_wait (pool=0x7fff88e77088) at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/intern/task_pool.cc:237
#17 BLI_task_pool_work_and_wait (pool=0x7fff88e77088) at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/intern/task_pool.cc:470
#18 0x00000000010a3ba6 in blender::deg::(anonymous namespace)::evaluate_graph_threaded_stage (state=state@entry=0x7fffffffd650, task_pool=<optimized out>, 
    task_pool@entry=0x7fff88e77088, stage=stage@entry=blender::deg::(anonymous namespace)::EvaluationStage::THREADED_EVALUATION)
    at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:323
#19 0x00000000010a3e2c in blender::deg::deg_evaluate_on_refresh (graph=0x7fffa4246c08)
    at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:445
#20 0x0000000000a2729c in scene_graph_update_tagged (depsgraph=0x7fffa4246c08, bmain=0x7fff9809de08, only_if_tagged=<optimized out>)
    at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/scene.cc:2709
#21 0x0000000000ef5c13 in wm_event_do_depsgraph (C=C@entry=0x7fffea7f5388, is_after_open_file=is_after_open_file@entry=false)
    at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm_event_system.cc:471
#22 0x0000000000ef5d67 in wm_event_do_refresh_wm_and_depsgraph (C=0x7fffea7f5388)
    at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm_event_system.cc:493
#23 0x0000000000efe6fb in wm_event_do_notifiers (C=0x7fffea7f5388)
    at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm_event_system.cc:716
#24 0x0000000000eefde8 in WM_main (C=C@entry=0x7fffea7f5388) at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm.c:649
#25 0x0000000000709026 in main (argc=2, argv=0x7fffffffda38) at /home/vignette/Git/blender-build-env/blender/source/creator/creator.c:583

The /tmp/crash_potencial.crash.txt:

# Blender 3.6.0, Commit date: 2023-06-10 13:37, Hash d79524e3098e
Saved "crash_potencial.blend"  # Info
bpy.ops.object.modifier_add(type='WEIGHTED_NORMAL')  # Operator
bpy.context.object.modifiers["WeightedNormal"].show_viewport = False  # Property
bpy.context.object.modifiers["WeightedNormal"].show_viewport = True  # Property

# backtrace

# Python backtrace

Exact steps for others to reproduce the error
Based on the default startup or an attached .blend file (as simple as possible).

The file provided was created in the following way:

  1. Create a cube
  2. Subsurf it a lot (for me it had 196k faces)
  3. Enable 'Auto Smooth' on it
  4. Add Solidify modifier
  5. Add Weighted Normals modifier

After attempting step 5, Blender should crash. If it miraculously survived, you can toggle the Weighted Normals modifier rapidly in great succession and that should invoke the crash as well.

The file provided (crash_potencial.blend) was created using the steps above without the last step.

**System Information** Operating system: Arch Linux Graphics card: AMD ATI Radeon 680M **Blender Version** Broken: d79524e3098e (3.6 release at the time of writing), da43c42e40b5 (earliest 3.6 from Builder that crashes) Worked: 3.4, 3.6 Alpha (521e79b86912, bb51cdedb7dd), 4.0 (b7b2e08dcb45 seems to be working) **Short description of error** Blender crashes instantly when adding WeightedNormal to a mesh. Below I am appending a `gdb` backtrace on a `RelWithDebugInfo` build: ```gdb Thread 1 "blender-target" received signal SIGSEGV, Segmentation fault. apply_weights_vertex_normal (wnmd=wnmd@entry=0x7fff88e9da88, wn_data=wn_data@entry=0x7fffffffc990) at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/BLI_array.hh:191 191 T &operator[](int64_t index) (gdb) bt #0 apply_weights_vertex_normal (wnmd=wnmd@entry=0x7fff88e9da88, wn_data=wn_data@entry=0x7fffffffc990) at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/BLI_array.hh:191 #1 0x000000000128e0aa in wn_face_area (wn_data=0x7fffffffc990, wnmd=0x7fff88e9da88) at /home/vignette/Git/blender-build-env/blender/source/blender/modifiers/intern/MOD_weighted_normal.cc:405 #2 modifyMesh (md=0x7fff88e9da88, ctx=<optimized out>, mesh=<optimized out>) at /home/vignette/Git/blender-build-env/blender/source/blender/modifiers/intern/MOD_weighted_normal.cc:578 #3 0x0000000000d3b8aa in mesh_calc_modifiers (depsgraph=depsgraph@entry=0x7fffa4246c08, scene=0x7fffdea8a008, ob=ob@entry=0x7fff980bbe08, use_deform=use_deform@entry=true, need_mapping=false, dataMask=dataMask@entry=0x7fffffffd2f0, use_cache=true, allow_shared_mesh=true, r_deform=0x7fffffffd288, r_final=0x7fffffffd280, r_geometry_set=0x7fffffffd290) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/DerivedMesh.cc:875 #4 0x0000000000d3c2ec in mesh_build_data (depsgraph=0x7fffa4246c08, scene=<optimized out>, ob=0x7fff980bbe08, dataMask=0x7fffffffd2f0, need_mapping=<optimized out>) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/DerivedMesh.cc:1461 #5 0x0000000000d3c517 in makeDerivedMesh (depsgraph=0x7fffa4246c08, scene=0x7fffdea8a008, ob=0x7fff980bbe08, dataMask=<optimized out>) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/DerivedMesh.cc:1642 #6 0x00000000009cb7eb in BKE_object_handle_data_update (depsgraph=depsgraph@entry=0x7fffa4246c08, scene=scene@entry=0x7fffdea8a008, ob=ob@entry=0x7fff980bbe08) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/object_update.cc:162 #7 0x00000000009cbd2e in BKE_object_eval_uber_data (depsgraph=0x7fffa4246c08, scene=0x7fffdea8a008, ob=0x7fff980bbe08) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/object_update.cc:328 #8 0x00000000010a3a11 in std::function<void (Depsgraph*)>::operator()(Depsgraph*) const (__args#0=<optimized out>, this=0x7fffde9fdac0) at /usr/lib/gcc/x86_64-pc-linux-gnu/12.3.0/include/c++/bits/std_function.h:591 #9 blender::deg::(anonymous namespace)::evaluate_node (operation_node=operation_node@entry=0x7fffde9fda08, state=0x7fffffffd650) at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:101 #10 0x00000000010a3c4b in blender::deg::(anonymous namespace)::deg_task_run_func (pool=<optimized out>, taskdata=0x7fffde9fda08) at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:118 #11 0x00000000084b919d in tbb::internal::function_task<Task>::execute (this=<optimized out>) at /home/vignette/Git/blender-build-env/lib/linux_x86_64_glibc_228/tbb/include/tbb/task.h:1059 #12 0x00007ffff7f52b45 in tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::process_bypass_loop(tbb::internal::context_guard_helper<false>&, tbb::task*, long) () from /home/vignette/Git/blender-build-env/build/bin/lib/libtbb.so.2 #13 0x00007ffff7f52e78 in tbb::internal::custom_scheduler<tbb::internal::IntelSchedulerTraits>::local_wait_for_all(tbb::task&, tbb::task*) () from /home/vignette/Git/blender-build-env/build/bin/lib/libtbb.so.2 #14 0x00000000084b8f48 in tbb::task::wait_for_all (this=<optimized out>) at /home/vignette/Git/blender-build-env/lib/linux_x86_64_glibc_228/tbb/include/tbb/task.h:820 #15 tbb::internal::task_group_base::wait (this=0x7fff88e770c0) at /home/vignette/Git/blender-build-env/lib/linux_x86_64_glibc_228/tbb/include/tbb/task_group.h:168 #16 tbb_task_pool_work_and_wait (pool=0x7fff88e77088) at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/intern/task_pool.cc:237 #17 BLI_task_pool_work_and_wait (pool=0x7fff88e77088) at /home/vignette/Git/blender-build-env/blender/source/blender/blenlib/intern/task_pool.cc:470 #18 0x00000000010a3ba6 in blender::deg::(anonymous namespace)::evaluate_graph_threaded_stage (state=state@entry=0x7fffffffd650, task_pool=<optimized out>, task_pool@entry=0x7fff88e77088, stage=stage@entry=blender::deg::(anonymous namespace)::EvaluationStage::THREADED_EVALUATION) at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:323 #19 0x00000000010a3e2c in blender::deg::deg_evaluate_on_refresh (graph=0x7fffa4246c08) at /home/vignette/Git/blender-build-env/blender/source/blender/depsgraph/intern/eval/deg_eval.cc:445 #20 0x0000000000a2729c in scene_graph_update_tagged (depsgraph=0x7fffa4246c08, bmain=0x7fff9809de08, only_if_tagged=<optimized out>) at /home/vignette/Git/blender-build-env/blender/source/blender/blenkernel/intern/scene.cc:2709 #21 0x0000000000ef5c13 in wm_event_do_depsgraph (C=C@entry=0x7fffea7f5388, is_after_open_file=is_after_open_file@entry=false) at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm_event_system.cc:471 #22 0x0000000000ef5d67 in wm_event_do_refresh_wm_and_depsgraph (C=0x7fffea7f5388) at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm_event_system.cc:493 #23 0x0000000000efe6fb in wm_event_do_notifiers (C=0x7fffea7f5388) at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm_event_system.cc:716 #24 0x0000000000eefde8 in WM_main (C=C@entry=0x7fffea7f5388) at /home/vignette/Git/blender-build-env/blender/source/blender/windowmanager/intern/wm.c:649 #25 0x0000000000709026 in main (argc=2, argv=0x7fffffffda38) at /home/vignette/Git/blender-build-env/blender/source/creator/creator.c:583 ``` The `/tmp/crash_potencial.crash.txt`: ``` # Blender 3.6.0, Commit date: 2023-06-10 13:37, Hash d79524e3098e Saved "crash_potencial.blend" # Info bpy.ops.object.modifier_add(type='WEIGHTED_NORMAL') # Operator bpy.context.object.modifiers["WeightedNormal"].show_viewport = False # Property bpy.context.object.modifiers["WeightedNormal"].show_viewport = True # Property # backtrace # Python backtrace ``` **Exact steps for others to reproduce the error** Based on the default startup or an attached .blend file (as simple as possible). The file provided was created in the following way: 1. Create a cube 2. Subsurf it a lot (for me it had 196k faces) 3. Enable 'Auto Smooth' on it 4. Add Solidify modifier 5. Add Weighted Normals modifier After attempting step 5, Blender should crash. If it miraculously survived, you can toggle the Weighted Normals modifier rapidly in great succession and that should invoke the crash as well. The file provided (`crash_potencial.blend`) was created using the steps above without the last step.
crash_potencial.blend
3.4 MiB
Pavel Duong added the
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 labels 2023-06-11 21:13:58 +02:00
Iliya Katushenock changed title from SEGFAULT when adding WeightedNormal modifier to Modifiers: Crash when adding Weighted Normal to large mesh 2023-06-11 21:37:19 +02:00
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Iliya Katushenock commented 2023-06-11 21:38:57 +02:00
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Unable to reproduce in: old 3.4, 3.5, last 3.4, 3.6, 4.0, 4.0 debug. Both by steps and using example file.

Unable to reproduce in: old 3.4, 3.5, last 3.4, 3.6, 4.0, 4.0 debug. Both by steps and using example file.
Pavel Duong commented 2023-06-11 22:27:06 +02:00
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Unable to reproduce in: old 3.4, 3.5, last 3.4, 3.6, 4.0, 4.0 debug. Both by steps and using example file.

May I ask which OS have you tested it on? I've gone around and asked a few people with different OS and setups to test this:

  1. Crashed on a different Arch Linux setup
  2. Didn't crash on Mac M2 Air
  3. Didn't crash on Windows 11 (22H2 22621.1702)
  4. Didn't crash on Wine
> Unable to reproduce in: old 3.4, 3.5, last 3.4, 3.6, 4.0, 4.0 debug. Both by steps and using example file. May I ask which OS have you tested it on? I've gone around and asked a few people with different OS and setups to test this: 1. Crashed on a different Arch Linux setup 2. Didn't crash on Mac M2 Air 3. Didn't crash on Windows 11 (22H2 22621.1702) 4. Didn't crash on Wine
Iliya Katushenock commented 2023-06-11 22:28:53 +02:00
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My 3/

My 3/
Iliya Katushenock added the
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 label 2023-06-11 22:29:03 +02:00
Jesse Yurkovich commented 2023-06-11 22:36:29 +02:00
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I just built latest main on Linux w/ASAN here and could also not reproduce the issue; either from scratch or with your file. I tried toggling the Weighted Normal modifier off/on for quite a bit but still nothing :-/

I just built latest `main` on Linux w/ASAN here and could also not reproduce the issue; either from scratch or with your file. I tried toggling the Weighted Normal modifier off/on for quite a bit but still nothing :-/
Pavel Duong commented 2023-06-11 22:48:48 +02:00
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I just built latest main on Linux w/ASAN here and could also not reproduce the issue; either from scratch or with your file. I tried toggling the Weighted Normal modifier off/on for quite a bit but still nothing :-/

Can you try the blender-v3.6-release branch? The 4.0 doesn't seem to have this issue in my testing as well.

> I just built latest `main` on Linux w/ASAN here and could also not reproduce the issue; either from scratch or with your file. I tried toggling the Weighted Normal modifier off/on for quite a bit but still nothing :-/ Can you try the `blender-v3.6-release` branch? The 4.0 doesn't seem to have this issue in my testing as well.
Jesse Yurkovich commented 2023-06-11 23:41:41 +02:00
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Indeed. Can confirm now as I missed the fact that this was really only a 3.6 issue.

Indeed. Can confirm now as I missed the fact that this was really only a 3.6 issue.
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 labels 2023-06-11 23:42:13 +02:00
Iliya Katushenock added this to the 3.6 LTS milestone 2023-06-11 23:47:02 +02:00
Iliya Katushenock commented 2023-06-11 23:47:35 +02:00
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Probably it's regression?

Probably it's regression?
Jesse Yurkovich commented 2023-06-12 04:29:52 +02:00
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Git bisect wants to blame 17d161f565 but I could not find a related fix that would explain why main seems ok.
CC @HooglyBoogly

Git bisect wants to blame 17d161f56537d424d369a1dcf4c47d3976842af8 but I could not find a related fix that would explain why `main` seems ok. CC @HooglyBoogly
👍 1
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Hans Goudey self-assigned this 2023-06-12 04:46:25 +02:00
Iliya Katushenock changed title from Modifiers: Crash when adding Weighted Normal to large mesh to Regression: Modifiers: Crash when adding Weighted Normal to large mesh 2023-06-12 11:53:03 +02:00
Hans Goudey commented 2023-06-13 17:48:05 +02:00
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Fixed by 4834b301f0. I forgot to commit that one to 3.6 as well, it was already in main.

Fixed by 4834b301f046d3284680dd4b2d41be90aefba53f. I forgot to commit that one to 3.6 as well, it was already in main.
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 labels 2023-06-13 17:48:22 +02:00
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