Regression: crash in BKE_mesh_tag_coords_changed when modifying vertex coods of appended item via script #99171

New Issue

Chris Eveleigh · 2022-06-25T19:53:58+02:00

Chris Eveleigh commented

2022-06-25 19:53:58 +02:00

System Information
Operating system: Linux-5.17.4-200.fc35.x86_64-x86_64-with-glibc2.34 64 Bits
Graphics card: AMD VERDE (DRM 2.50.0, 5.17.4-200.fc35.x86_64, LLVM 13.0.0) AMD 4.5 (Core Profile) Mesa 21.3.8

Blender Version
Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-06-24 21:39, hash: 12bde317f4
Worked: I have commit d2a3b99ff7 working, but it looks like the change was introduced in 54182e

Short description of error
using python scripting to modify vertex coordinates crashes blender under some circumstances. So far I can reliably get a crash if the object has been appended from another file or if several 'modify, undo' steps are repeated.blender.crash.txt

Exact steps for others to reproduce the error
append an object from another file. (i just saved the default scene and imported Cube from it).
in the python console do:
bpy.data.objects[object name].data.vertices- [x].co = (5, 5, 5)

alternatively, to crash without appending from a source, try from a new scene, repeating:
bpy.data.objects["Cube"].data.vertices- [x].co = (5, 5, 5)
ctrl-z to undo

a few times. i usually get a crash in 3-4 repeats.

**System Information** Operating system: Linux-5.17.4-200.fc35.x86_64-x86_64-with-glibc2.34 64 Bits Graphics card: AMD VERDE (DRM 2.50.0, 5.17.4-200.fc35.x86_64, LLVM 13.0.0) AMD 4.5 (Core Profile) Mesa 21.3.8 **Blender Version** Broken: version: 3.3.0 Alpha, branch: master, commit date: 2022-06-24 21:39, hash: `12bde317f4` Worked: I have commit d2a3b99ff7ab working, but it looks like the change was introduced in 54182e **Short description of error** using python scripting to modify vertex coordinates crashes blender under some circumstances. So far I can reliably get a crash if the object has been appended from another file or if several 'modify, undo' steps are repeated.[blender.crash.txt](https://archive.blender.org/developer/F13229449/blender.crash.txt) **Exact steps for others to reproduce the error** append an object from another file. (i just saved the default scene and imported Cube from it). in the python console do: bpy.data.objects[*object name*].data.vertices- [x].co = (5, 5, 5) alternatively, to crash without appending from a source, try from a new scene, repeating: bpy.data.objects["Cube"].data.vertices- [x].co = (5, 5, 5) ctrl-z to undo a few times. i usually get a crash in 3-4 repeats.

Chris Eveleigh commented

2022-06-25 19:53:58 +02:00

Added subscriber: @whyohme

Philipp Oeser commented

2022-06-26 18:12:01 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2022-06-26 18:12:01 +02:00

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

Philipp Oeser commented

2022-06-26 18:12:01 +02:00

Can confirm.

Hans Goudey commented

2022-06-26 18:14:46 +02:00

Added subscriber: @HooglyBoogly

Hans Goudey commented

2022-06-26 18:14:46 +02:00

It's this line here that it crashes: MEM_SAFE_FREE(mesh->runtime.looptris.array);
Apparently looptris.array is an illegal pointer. I'm not quite sure why yet.

It's this line here that it crashes: `MEM_SAFE_FREE(mesh->runtime.looptris.array);` Apparently `looptris.array` is an illegal pointer. I'm not quite sure why yet.

Philipp Oeser commented

2022-06-26 18:19:06 +02:00

CC @HooglyBoogly

Philipp Oeser changed title from ~~crash in BKE_mesh_tag_coords_changed when modifying vertex coods of appended item via script~~ to Regression: crash in BKE_mesh_tag_coords_changed when modifying vertex coods of appended item via script

2022-06-26 18:19:27 +02:00

Philipp Oeser commented

2022-06-26 18:44:52 +02:00

Seems we cant use rna_Mesh_update_positions_tag directly, we are acting on a MeshVert...
Get a mesh from that via rna_mesh(ptr)

Seems we cant use `rna_Mesh_update_positions_tag` directly, we are acting on a MeshVert... Get a mesh from that via `rna_mesh(ptr)`

Hans Goudey self-assigned this 2022-06-27 00:45:28 +02:00

blender-admin commented

2022-06-27 15:01:54 +02:00

This issue was referenced by 151fc2fcd8

This issue was referenced by 151fc2fcd8461a9a28a2e912148718d51e8efd37

Hans Goudey commented

2022-06-27 15:02:03 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Hans Goudey closed this issue

2022-06-27 15:02:03 +02:00

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Regression: crash in BKE_mesh_tag_coords_changed when modifying vertex coods of appended item via script #99171