Crash after executing the script #110450

New Issue

William Gacquer · 2023-07-25T08:58:46+02:00

William Gacquer commented

2023-07-25 08:58:46 +02:00

System Information
Operating system: Windows-10-10.0.22621-SP0 64 Bits
Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.98

Blender Version
Broken: version: 3.6.1 Release Candidate, branch: blender-v3.6-release, commit date: 2023-07-16 02:43, hash: edc1a09966a7
Worked: (newest version of Blender that worked as expected)

Short description of error
Application crashes when clicking on the script run button

Exact steps for others to reproduce the error
1/ launch Blender
2/ click on "Scripting" tab; click "New"
3/ paste the following chatgpt generated script and run it:

import bpy
from math import sqrt, sin, cos

# Define the vertices of the tetrahedrons
vertices1 = [
    (1, 1, 1),
    (-1, -1, 1),
    (-1, 1, -1),
    (1, -1, -1)
]

vertices2 = [
    (1, -1, -1),
    (-1, 1, -1),
    (-1, -1, 1),
    (1, 1, 1)
]

# Define the faces of the tetrahedrons
faces1 = [
    (0, 1, 2),
    (0, 2, 3),
    (0, 3, 1),
    (1, 3, 2)
]

faces2 = [
    (0, 1, 2),
    (0, 2, 3),
    (0, 3, 1),
    (1, 3, 2)
]

# Create new meshes and objects
mesh1 = bpy.data.meshes.new("Tetrahedron1")
obj1 = bpy.data.objects.new("Tetrahedron1", mesh1)

mesh2 = bpy.data.meshes.new("Tetrahedron2")
obj2 = bpy.data.objects.new("Tetrahedron2", mesh2)

# Set the object locations and scene context
obj1.location = (-2, 0, 0)
bpy.context.scene.collection.objects.link(obj1)

obj2.location = (2, 0, 0)
bpy.context.scene.collection.objects.link(obj2)

# Create the vertices and faces of the meshes
mesh1.from_pydata(vertices1, [], faces1)
mesh1.update(calc_edges=True)

mesh2.from_pydata(vertices2, [], faces2)
mesh2.update(calc_edges=True)

# Hinge the tetrahedrons together by one edge
edge1 = mesh1.edges[0]
edge2 = mesh2.edges[2]

bpy.ops.object.select_all(action='DESELECT')
obj1.select_set(True)
obj2.select_set(True)

bpy.context.view_layer.objects.active = obj2
bpy.ops.object.mode_set(mode='EDIT')
bpy.ops.mesh.select_all(action='DESELECT')
edge2.select = True
bpy.ops.mesh.edge_face_add()
bpy.ops.object.mode_set(mode='OBJECT')

# Add an armature to the tetrahedrons
bpy.ops.object.armature_add()
armature = bpy.context.object
armature.name = "HingeArmature"
armature.location = (0, 0, 0)

# Add bones to the armature
bpy.ops.object.mode_set(mode='EDIT')
bone1 = armature.data.edit_bones.new('Bone1')
bone1.head = (0, 0, 0)
bone1.tail = (-2, 0, 0)
bone1.use_deform = False

bone2 = armature.data.edit_bones.new('Bone2')
bone2.head = (0, 0, 0)
bone2.tail = (2, 0, 0)
bone2.use_deform = False

bpy.ops.object.mode_set(mode='OBJECT')

# Parent the tetrahedrons to the armature
obj1.parent = armature
obj1.parent_type = 'BONE'
obj1.parent_bone = 'Bone1'

obj2.parent = armature
obj2.parent_type = 'BONE'
obj2.parent_bone = 'Bone2'

# Animate the hinge
frames = 30

for frame in range(frames):
    bpy.context.scene.frame_set(frame)

    angle = frame / frames * 2 * 3.14159265

    bone1.tail = (-2 * cos(angle), 0, -2 * sin(angle))
    bone2.tail = (2 * cos(angle), 0, 2 * sin(angle))

    bone1.keyframe_insert(data_path='tail')
    bone2.keyframe_insert(data_path='tail')

**System Information** Operating system: Windows-10-10.0.22621-SP0 64 Bits Graphics card: NVIDIA GeForce RTX 3080 Laptop GPU/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 535.98 **Blender Version** Broken: version: 3.6.1 Release Candidate, branch: blender-v3.6-release, commit date: 2023-07-16 02:43, hash: `edc1a09966a7` Worked: (newest version of Blender that worked as expected) **Short description of error** Application crashes when clicking on the script run button **Exact steps for others to reproduce the error** 1/ launch Blender 2/ click on "Scripting" tab; click "New" 3/ paste the following chatgpt generated script and run it: ``` import bpy from math import sqrt, sin, cos # Define the vertices of the tetrahedrons vertices1 = [ (1, 1, 1), (-1, -1, 1), (-1, 1, -1), (1, -1, -1) ] vertices2 = [ (1, -1, -1), (-1, 1, -1), (-1, -1, 1), (1, 1, 1) ] # Define the faces of the tetrahedrons faces1 = [ (0, 1, 2), (0, 2, 3), (0, 3, 1), (1, 3, 2) ] faces2 = [ (0, 1, 2), (0, 2, 3), (0, 3, 1), (1, 3, 2) ] # Create new meshes and objects mesh1 = bpy.data.meshes.new("Tetrahedron1") obj1 = bpy.data.objects.new("Tetrahedron1", mesh1) mesh2 = bpy.data.meshes.new("Tetrahedron2") obj2 = bpy.data.objects.new("Tetrahedron2", mesh2) # Set the object locations and scene context obj1.location = (-2, 0, 0) bpy.context.scene.collection.objects.link(obj1) obj2.location = (2, 0, 0) bpy.context.scene.collection.objects.link(obj2) # Create the vertices and faces of the meshes mesh1.from_pydata(vertices1, [], faces1) mesh1.update(calc_edges=True) mesh2.from_pydata(vertices2, [], faces2) mesh2.update(calc_edges=True) # Hinge the tetrahedrons together by one edge edge1 = mesh1.edges[0] edge2 = mesh2.edges[2] bpy.ops.object.select_all(action='DESELECT') obj1.select_set(True) obj2.select_set(True) bpy.context.view_layer.objects.active = obj2 bpy.ops.object.mode_set(mode='EDIT') bpy.ops.mesh.select_all(action='DESELECT') edge2.select = True bpy.ops.mesh.edge_face_add() bpy.ops.object.mode_set(mode='OBJECT') # Add an armature to the tetrahedrons bpy.ops.object.armature_add() armature = bpy.context.object armature.name = "HingeArmature" armature.location = (0, 0, 0) # Add bones to the armature bpy.ops.object.mode_set(mode='EDIT') bone1 = armature.data.edit_bones.new('Bone1') bone1.head = (0, 0, 0) bone1.tail = (-2, 0, 0) bone1.use_deform = False bone2 = armature.data.edit_bones.new('Bone2') bone2.head = (0, 0, 0) bone2.tail = (2, 0, 0) bone2.use_deform = False bpy.ops.object.mode_set(mode='OBJECT') # Parent the tetrahedrons to the armature obj1.parent = armature obj1.parent_type = 'BONE' obj1.parent_bone = 'Bone1' obj2.parent = armature obj2.parent_type = 'BONE' obj2.parent_bone = 'Bone2' # Animate the hinge frames = 30 for frame in range(frames): bpy.context.scene.frame_set(frame) angle = frame / frames * 2 * 3.14159265 bone1.tail = (-2 * cos(angle), 0, -2 * sin(angle)) bone2.tail = (2 * cos(angle), 0, 2 * sin(angle)) bone1.keyframe_insert(data_path='tail') bone2.keyframe_insert(data_path='tail') ```

William Gacquer added the

labels 2023-07-25 08:58:47 +02:00

YimingWu commented

2023-07-25 09:18:52 +02:00

HI, it crashed when assigning scalar value to bone.tail which is a vector.

ChatGPT is not a good way of generating usable code. Please try following the python documentation and program your feature.

HI, it crashed when assigning scalar value to `bone.tail` which is a vector. ChatGPT is not a good way of generating usable code. Please try following the python documentation and program your feature.

YimingWu closed this issue

2023-07-25 09:18:54 +02:00

Blender Bot added

and removed

labels 2023-07-25 09:18:56 +02:00

William Gacquer commented

2023-07-25 10:04:00 +02:00

I beg your pardon but I did not want help to fix the code. I definitely know that the code is wrong.
I report the fact that Blender crashes instead of raising an exception. This is the bug. No script should be able to kill Blender.
Sorry for the misunderstanding implied by a not detailed enough bug report.

I beg your pardon but I did not want help to fix the code. I definitely know that the code is wrong. I report the fact that Blender crashes instead of raising an exception. This is the bug. No script should be able to kill Blender. Sorry for the misunderstanding implied by a not detailed enough bug report.

William Gacquer reopened this issue

2023-07-25 10:04:02 +02:00

Blender Bot added

and removed

labels 2023-07-25 10:04:03 +02:00

Pratik Borhade commented

2023-07-25 10:59:39 +02:00

I ran the script with vector input but it still crashes. Need to check further

simplified-script.txt

963 B

Iliya Katushenock commented

2023-07-25 11:10:19 +02:00

@PratikPB2123 On zero frame?

Pratik Borhade commented

2023-07-25 11:24:17 +02:00

that just skips the for loop.
Crash is probably because bone->parent points to garbage memory.

that just skips the for loop. Crash is probably because bone->parent points to garbage memory.

Pratik Borhade commented

2023-07-25 11:50:35 +02:00

I see, crash is because edit bone is accessed (refer: rna_Armature_editbone_transform_update) in object mode.
Just remove this line from python script: bpy.ops.object.mode_set(mode='OBJECT') (edit: from line 88)

I see, crash is because edit bone is accessed (refer: `rna_Armature_editbone_transform_update`) in object mode. Just remove this line from python script: `bpy.ops.object.mode_set(mode='OBJECT')` (edit: from line 88)

👀 1

Pratik Borhade commented

2023-07-25 11:56:45 +02:00

This is the bug. No script should be able to kill Blender.

python scripts do result in crash, not necessary they are bug always.
@dr.sybren , can you check? Would you consider this a bug?

> This is the bug. No script should be able to kill Blender. python scripts do result in crash, not necessary they are bug always. @dr.sybren , can you check? Would you consider this a bug?

Pratik Borhade added

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Crash after executing the script #110450