Crash snapping mesh if a beveled curve is present #91734

New Issue

Georg K · 2021-09-26T22:17:29+02:00

Georg K commented

2021-09-26 22:17:29 +02:00

System Information
Operating system: Linux-5.14.7-2-MANJARO-x86_64-with-glibc2.33 64 Bits
Graphics card: AMD VERDE (DRM 2.50.0, 5.14.7-2-MANJARO, LLVM 12.0.1) AMD 4.5 (Core Profile) Mesa 21.2.2

Blender Version
Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-09-24 14:42, hash: 4a2c63f4bd
Worked: 2.93

Apparently caused by 6a88f83d67

Short description of error
Blender will crash if you snap a mesh object in a scene that also includes a beveled curve object.
If you set the bevel depth of the curve to 0, the file will not crash. Trying to move and snap the curve does not cause a crash.
(In some earlier tests, it was necessary for the curve to have shapekeys, but the sample file crashes without. In some tests, changing the mesh geometry prevented the crash.)

Exact steps for others to reproduce the error
In the attached file, select the mesh object,

hit G to move and hold Ctrl to snap
try moving the mesh object (does not move)
Blender crashes

Crash snapping mesh if a beveled curve is present.blend

From scratch:

In the default scene, add a Bezier curve
change its bevel depth
select cube, press G then hold down Ctrl
Blender crashes

output:
Segmentation fault (core dumped)

backtrace:

 Blender 3.0.0, Commit date: 2021-09-24 14:42, Hash 4a2c63f4bd7e

# backtrace
../build_linux/bin/blender(BLI_system_backtrace+0x33) [0x7d81613]
../build_linux/bin/blender() [0xf4773b]
/usr/lib/libc.so.6(+0x3cda0) [0x7fcafe0abda0]
../build_linux/bin/blender(minmax_v3v3_v3+0) [0x7d37b70]
../build_linux/bin/blender(BKE_mesh_minmax+0x42) [0xfb8df2]
../build_linux/bin/blender(BKE_mesh_boundbox_get+0x97) [0xfb8127]
../build_linux/bin/blender() [0x1e2aa08]
../build_linux/bin/blender() [0x1e2afdc]
../build_linux/bin/blender() [0x1e2782e]
../build_linux/bin/blender() [0x1e2ba5d]
../build_linux/bin/blender(snapObjectsTransform+0xab) [0x1e2604b]
../build_linux/bin/blender() [0x1e262fa]
../build_linux/bin/blender(applySnapping+0xa9) [0x1e24fa9]
../build_linux/bin/blender() [0x1e1bcc3]
../build_linux/bin/blender(transformApply+0x71) [0x1de4de1]
../build_linux/bin/blender() [0x1e1e56b]
../build_linux/bin/blender() [0x133f38c]
../build_linux/bin/blender() [0x13407a7]
../build_linux/bin/blender() [0x1340ddc]
../build_linux/bin/blender(wm_event_do_handlers+0x248) [0x1341348]
../build_linux/bin/blender(WM_main+0x20) [0x13372a0]
../build_linux/bin/blender(main+0x336) [0xec0616]
/usr/lib/libc.so.6(__libc_start_main+0xd5) [0x7fcafe096b25]
../build_linux/bin/blender(_start+0x2e) [0xf43e0e]

# Python backtrace

**System Information** Operating system: Linux-5.14.7-2-MANJARO-x86_64-with-glibc2.33 64 Bits Graphics card: AMD VERDE (DRM 2.50.0, 5.14.7-2-MANJARO, LLVM 12.0.1) AMD 4.5 (Core Profile) Mesa 21.2.2 **Blender Version** Broken: version: 3.0.0 Alpha, branch: master, commit date: 2021-09-24 14:42, hash: `4a2c63f4bd` Worked: 2.93 Apparently caused by 6a88f83d67 **Short description of error** Blender will crash if you snap a mesh object in a scene that also includes a beveled curve object. If you set the bevel depth of the curve to 0, the file will not crash. Trying to move and snap the curve does not cause a crash. (In some earlier tests, it was necessary for the curve to have shapekeys, but the sample file crashes without. In some tests, changing the mesh geometry prevented the crash.) **Exact steps for others to reproduce the error** In the attached file, select the mesh object, - hit G to move and hold Ctrl to snap - try moving the mesh object (does not move) - Blender crashes [Crash snapping mesh if a beveled curve is present.blend](https://archive.blender.org/developer/F10617539/Crash_snapping_mesh_if_a_beveled_curve_is_present.blend) From scratch: - In the default scene, add a Bezier curve - change its bevel depth - select cube, press G then hold down Ctrl - Blender crashes output: Segmentation fault (core dumped) backtrace: ```lines Blender 3.0.0, Commit date: 2021-09-24 14:42, Hash 4a2c63f4bd7e # backtrace ../build_linux/bin/blender(BLI_system_backtrace+0x33) [0x7d81613] ../build_linux/bin/blender() [0xf4773b] /usr/lib/libc.so.6(+0x3cda0) [0x7fcafe0abda0] ../build_linux/bin/blender(minmax_v3v3_v3+0) [0x7d37b70] ../build_linux/bin/blender(BKE_mesh_minmax+0x42) [0xfb8df2] ../build_linux/bin/blender(BKE_mesh_boundbox_get+0x97) [0xfb8127] ../build_linux/bin/blender() [0x1e2aa08] ../build_linux/bin/blender() [0x1e2afdc] ../build_linux/bin/blender() [0x1e2782e] ../build_linux/bin/blender() [0x1e2ba5d] ../build_linux/bin/blender(snapObjectsTransform+0xab) [0x1e2604b] ../build_linux/bin/blender() [0x1e262fa] ../build_linux/bin/blender(applySnapping+0xa9) [0x1e24fa9] ../build_linux/bin/blender() [0x1e1bcc3] ../build_linux/bin/blender(transformApply+0x71) [0x1de4de1] ../build_linux/bin/blender() [0x1e1e56b] ../build_linux/bin/blender() [0x133f38c] ../build_linux/bin/blender() [0x13407a7] ../build_linux/bin/blender() [0x1340ddc] ../build_linux/bin/blender(wm_event_do_handlers+0x248) [0x1341348] ../build_linux/bin/blender(WM_main+0x20) [0x13372a0] ../build_linux/bin/blender(main+0x336) [0xec0616] /usr/lib/libc.so.6(__libc_start_main+0xd5) [0x7fcafe096b25] ../build_linux/bin/blender(_start+0x2e) [0xf43e0e] # Python backtrace ```

Georg K commented

2021-09-26 22:17:29 +02:00

Added subscriber: @georgK

blender-admin commented

2021-09-26 22:17:29 +02:00

#91717 was marked as duplicate of this issue

Vladimir commented

2021-09-26 23:11:44 +02:00

Added subscriber: @Wovchick

Pratik Borhade commented

2021-09-27 07:12:40 +02:00

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

Pratik Borhade commented

2021-09-27 07:12:46 +02:00

Added subscriber: @PratikPB2123

Philipp Oeser commented

2021-09-27 10:33:07 +02:00

Added subscribers: @Jeroen-Bakker, @lichtwerk

Philipp Oeser commented

2021-09-27 10:33:07 +02:00

Apparently caused by 6a88f83d67

@Jeroen-Bakker : can you check this?

Apparently caused by 6a88f83d67 @Jeroen-Bakker : can you check this?

Philipp Oeser commented

2021-09-27 10:34:56 +02:00

Added subscribers: @s12a, @deadpin, @iss

Hans Goudey commented

2021-09-27 16:24:53 +02:00

Added subscriber: @HooglyBoogly

Christoph commented

2021-09-29 06:50:14 +02:00

Added subscriber: @ChrisGraz

blender-admin commented

2021-09-30 07:30:47 +02:00

This issue was referenced by 6cff1d6480

This issue was referenced by 6cff1d648030f65bc299b1abd480c5a36504863d

Laurent Boucher commented

2021-09-30 08:39:35 +02:00

Added subscriber: @Tilapiatsu

Laurent Boucher commented

2021-09-30 09:27:29 +02:00

Hi @georgK , @Jeroen-Bakker ,

I have the same issue but with a little twist. The file you have shared workd perfectly for me. But for me the crash is happening only when I try to use the snapping if I have a curve converted from a mesh visible in the scene.
Hiding it is works well, remove the depth works well and deleting it works well

Opening the falty scene on the build from the 10th of september (eab26f1334) works well, but it starts crashing after this build, from 12th of september (b5a1c194c5)

The crash also happening when snapping the 3D cursor

Crash_report_Curve_snap.mp4
CurveSnap_CLEAN.blend
CurveSnap_CORRUPTED.blend

Thanks,

I hope it will help to fix the bug :)

Hi @georgK , @Jeroen-Bakker , I have the same issue but with a little twist. The file you have shared workd perfectly for me. But for me the crash is happening only when I try to use the snapping if I have a curve **converted from a mesh** visible in the scene. Hiding it is works well, remove the depth works well and deleting it works well Opening the falty scene on the build from the 10th of september (eab26f1334) works well, but it starts crashing after this build, from 12th of september (b5a1c194c5) The crash also happening when snapping the 3D cursor [Crash_report_Curve_snap.mp4](https://archive.blender.org/developer/F10687221/Crash_report_Curve_snap.mp4) [CurveSnap_CLEAN.blend](https://archive.blender.org/developer/F10687232/CurveSnap_CLEAN.blend) [CurveSnap_CORRUPTED.blend](https://archive.blender.org/developer/F10687234/CurveSnap_CORRUPTED.blend) Thanks, I hope it will help to fix the bug :)

Germano Cavalcante commented

2021-09-30 17:51:55 +02:00

Added subscriber: @mano-wii

Germano Cavalcante self-assigned this 2021-09-30 17:51:55 +02:00

Germano Cavalcante commented

2021-09-30 17:51:55 +02:00

Although the issue was introduced in 6a88f83d67, this only revealed an error in the snap code and one that is already being handled for example in D12282: Fix #90808: Undo curve selection recalculates boundbox based on curve data.
Fix on the way.

Although the issue was introduced in 6a88f83d67, this only revealed an error in the snap code and one that is already being handled for example in [D12282: Fix #90808: Undo curve selection recalculates boundbox based on curve data](https://archive.blender.org/developer/D12282). Fix on the way.

Germano Cavalcante commented

2021-09-30 18:13:32 +02:00

On further investigation, I'm not sure how 6a88f83d67 might have introduced the problem.
This problem has more to do with b9febb54a4, which forces the conversion of this type of curve to Mesh.

On further investigation, I'm not sure how 6a88f83d67 might have introduced the problem. This problem has more to do with b9febb54a4, which forces the conversion of this type of curve to Mesh.

Germano Cavalcante commented

2021-09-30 18:15:31 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Germano Cavalcante closed this issue

2021-09-30 18:15:31 +02:00

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Crash snapping mesh if a beveled curve is present #91734