Crash (segfault) when scaling with mirroring on. #78600

New Issue

Martijn Versteegh · 2020-07-04T14:15:33+02:00

Martijn Versteegh commented

2020-07-04 14:15:33 +02:00

System Information
Operating system: Linux-5.4.0-40-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 760/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-03 10:56, hash: aab41401f9
Worked: 2.83

Short description of error
If I first scale to zero in the z direction and then scale again, I get a segfault when mirroring is turned on.

Exact steps for others to reproduce the error

default startup
go to edit mode
turn on mirroring in the X direction (at the top of the 3d view, next to the 'butterfly' icon)
scale to zero in the z direction. (s, z, 0, ENTER)
scale again (s) => segfault

backtrace:

- 0  in copy_v3_v3 (r=0x3f8000003f800000, a=0x2) at /home/martijn/progs/blender-git/blender/source/blender/blenlib/intern/math_vector_inline.c:63
- 1  in transform_apply_to_mirror (t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_convert_mesh.c:1373
- 2  in recalcData_mesh (t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_convert_mesh.c:1397
- 3  in recalcData (t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_convert.c:1530
- 4  in applyResize (t=, UNUSED_mval=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_mode_resize.c:161
- 5  in transformApply (C=, t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform.c:2097
#6  in transform_modal (C=, op=, event=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_ops.c
:441
#7  in wm_handler_operator_call (C=, handlers=, handler_base=, event=, properties=0x0, kmi_idname=0x0) at /home/martijn/
progs/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:2018
#8  in wm_handlers_do_intern (C=, event=, handlers=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm
_event_system.c:2806
#9  in wm_handlers_do (C=, event=, handlers=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm_event_
system.c:2854
- 10  in wm_event_do_handlers (C=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:3283
- 11  in WM_main (C=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm.c:475
#12  in main (argc=1, argv=) at /home/martijn/progs/blender-git/blender/source/creator/creator.c:532

**System Information** Operating system: Linux-5.4.0-40-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: GeForce GTX 760/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 435.21 **Blender Version** Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-03 10:56, hash: `aab41401f9` Worked: 2.83 **Short description of error** If I first scale to zero in the z direction and then scale again, I get a segfault when mirroring is turned on. **Exact steps for others to reproduce the error** - default startup - go to edit mode - turn on mirroring in the X direction (at the top of the 3d view, next to the 'butterfly' icon) - scale to zero in the z direction. (s, z, 0, ENTER) - scale again (s) => segfault backtrace: ``` - 0 in copy_v3_v3 (r=0x3f8000003f800000, a=0x2) at /home/martijn/progs/blender-git/blender/source/blender/blenlib/intern/math_vector_inline.c:63 - 1 in transform_apply_to_mirror (t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_convert_mesh.c:1373 - 2 in recalcData_mesh (t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_convert_mesh.c:1397 - 3 in recalcData (t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_convert.c:1530 - 4 in applyResize (t=, UNUSED_mval=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_mode_resize.c:161 - 5 in transformApply (C=, t=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform.c:2097 #6 in transform_modal (C=, op=, event=) at /home/martijn/progs/blender-git/blender/source/blender/editors/transform/transform_ops.c :441 #7 in wm_handler_operator_call (C=, handlers=, handler_base=, event=, properties=0x0, kmi_idname=0x0) at /home/martijn/ progs/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:2018 #8 in wm_handlers_do_intern (C=, event=, handlers=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm _event_system.c:2806 #9 in wm_handlers_do (C=, event=, handlers=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm_event_ system.c:2854 - 10 in wm_event_do_handlers (C=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm_event_system.c:3283 - 11 in WM_main (C=) at /home/martijn/progs/blender-git/blender/source/blender/windowmanager/intern/wm.c:475 #12 in main (argc=1, argv=) at /home/martijn/progs/blender-git/blender/source/creator/creator.c:532 ```

Martijn Versteegh commented

2020-07-04 14:15:33 +02:00

Added subscriber: @Baardaap

Richard Antalik commented

2020-07-08 03:22:09 +02:00

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

Bastien Montagne commented

2020-07-30 18:12:42 +02:00

Added subscriber: @mont29

Bastien Montagne commented

2020-07-30 18:12:42 +02:00

the problem is that BMesh code only detects two mirror pairs insted of four, because of vertices sharing the same exact location... Not sure yet how to properly fix that, needs more understanding of exact behavior of the code involved.

blender-admin commented

2020-07-31 16:23:43 +02:00

This issue was referenced by 1ff1a2be9c

This issue was referenced by 1ff1a2be9c6badc0b410a5c0e9731e505fae14ea

Germano Cavalcante commented

2020-07-31 16:25:30 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Germano Cavalcante closed this issue

2020-07-31 16:25:30 +02:00

Germano Cavalcante self-assigned this 2020-07-31 16:25:30 +02:00

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Crash (segfault) when scaling with mirroring on. #78600