bisect_plane via python crashes blender #72465

New Issue

richard schweiger · 2019-12-15T17:10:49+01:00

richard schweiger commented

2019-12-15 17:10:49 +01:00

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.31

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: blender/blender@f1aa4d18d4

Short description of error
reduced the script to a minimum just reading the bmesh and oparating the bisect.
when i hit "run script" bledner crashes in running the bisect line.

Exact steps for others to reproduce the error
see the file attached having the script:

import bpy
from mathutils import Vector,Matrix
import bmesh
obj=bpy.context.scene.objects["Cube"]
bpy.ops.object.mode_set(mode='EDIT');
bm = bmesh.from_edit_mesh(obj.data)
visible_geom = [g for g in bm.faces- [x] + bm.verts- [x] + bm.edges[:]]
loc=Vector([0,0,0.25])
bisectno=Vector([0,0,1])bisect_test.blend
bmesh.ops.bisect_plane( bm, geom=visible_geom, dist=0.001, plane_co=loc, plane_no=bisectno)

**System Information** Operating system: Windows-7-6.1.7601-SP1 64 Bits Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 388.31 **Blender Version** Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-12-04 11:32, hash: `blender/blender@f1aa4d18d4` **Short description of error** reduced the script to a minimum just reading the bmesh and oparating the bisect. when i hit "run script" bledner crashes in running the bisect line. **Exact steps for others to reproduce the error** see the file attached having the script: import bpy from mathutils import Vector,Matrix import bmesh obj=bpy.context.scene.objects["Cube"] bpy.ops.object.mode_set(mode='EDIT'); bm = bmesh.from_edit_mesh(obj.data) visible_geom = [g for g in bm.faces- [x] + bm.verts- [x] + bm.edges[:]] loc=Vector([0,0,0.25]) bisectno=Vector([0,0,1])[bisect_test.blend](https://archive.blender.org/developer/F8223397/bisect_test.blend) bmesh.ops.bisect_plane( bm, geom=visible_geom, dist=0.001, plane_co=loc, plane_no=bisectno)

richard schweiger commented

2019-12-15 17:10:49 +01:00

Added subscriber: @office

richard schweiger changed title from ~~bisect_plane via python crashes belnder~~ to bisect_plane via python crashes blender

2019-12-15 17:11:09 +01:00

Jacques Lucke commented

2019-12-29 15:00:06 +01:00

Added subscriber: @JacquesLucke

Jacques Lucke commented

2019-12-29 15:00:06 +01:00

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

Jacques Lucke closed this issue

2019-12-29 15:00:06 +01:00

Jacques Lucke self-assigned this 2019-12-29 15:00:06 +01:00

Jacques Lucke commented

2019-12-29 15:00:06 +01:00

The issue seems to be not directly related to bisect_plane. Two things indicate that:

The crash happens in the drawing code.
When I add bpy.ops.object.mode_set(mode='OBJECT') or bmesh.update_edit_mesh(obj.data) as last line, it does not crash anymore.

I think the bug here is in your code. You take the bmesh from edit mesh, modify it, and don't write it back.

Closing because it is probably wrong api usage.

The issue seems to be not directly related to `bisect_plane`. Two things indicate that: 1. The crash happens in the drawing code. 2. When I add `bpy.ops.object.mode_set(mode='OBJECT')` or `bmesh.update_edit_mesh(obj.data)` as last line, it does not crash anymore. I think the bug here is in your code. You take the bmesh from edit mesh, modify it, and don't write it back. Closing because it is probably wrong api usage.

richard schweiger commented

2020-01-03 14:28:31 +01:00

thank you! sorry for bothering then.

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bisect_plane via python crashes blender #72465