Blender crashes when using bpy.ops.view3d.view_orbit with a custom context #94471

New Issue

Heath Mitchell · 2021-12-29T20:07:13+01:00

Heath Mitchell commented

2021-12-29 20:07:13 +01:00

System Information
Operating system: Linux-5.15.11-arch2-1-x86_64-with-glibc2.33 64 Bits
Graphics card: AMD RENOIR (DRM 3.42.0, 5.15.11-arch2-1, LLVM 13.0.0) AMD 4.6 (Core Profile) Mesa 21.3.2

Also tested on WIndows:

Operating system: Windows-10-10.0.22000-SP0 64 Bits
Graphics card: AMD Radeon(TM) Graphics ATI Technologies Inc. 4.5.14756 Core Profile Context 20.40.32 27.20.14032.8

Blender Version
Broken (Linux): version: 3.0.0, branch: makepkg (modified), commit date: 2021-12-02 18:35, hash: f1cca30557
Broken (Windows): version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: f1cca30557
Worked: Never, the crash happens in 2.7 and 2.6 doesn't seem to support the override thing (I haven't tested subversions)

Short description of error
Blender crashes when using bpy.ops.view3d.view_orbit with a custom context

Exact steps for others to reproduce the error
Run this in the Python console:

area = [n for n in bpy.context.screen.areas if n.type == "VIEW_3D"][0]
override = bpy.context.copy()
override['area'] = area
bpy.ops.view3d.view_orbit(override, type='ORBITLEFT')

blender.crash.txt

**System Information** Operating system: Linux-5.15.11-arch2-1-x86_64-with-glibc2.33 64 Bits Graphics card: AMD RENOIR (DRM 3.42.0, 5.15.11-arch2-1, LLVM 13.0.0) AMD 4.6 (Core Profile) Mesa 21.3.2 Also tested on WIndows: Operating system: Windows-10-10.0.22000-SP0 64 Bits Graphics card: AMD Radeon(TM) Graphics ATI Technologies Inc. 4.5.14756 Core Profile Context 20.40.32 27.20.14032.8 **Blender Version** Broken (Linux): version: 3.0.0, branch: makepkg (modified), commit date: 2021-12-02 18:35, hash: `f1cca30557` Broken (Windows): version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: `f1cca30557` Worked: Never, the crash happens in 2.7 and 2.6 doesn't seem to support the override thing (I haven't tested subversions) **Short description of error** Blender crashes when using `bpy.ops.view3d.view_orbit` with a custom context **Exact steps for others to reproduce the error** Run this in the Python console: ``` area = [n for n in bpy.context.screen.areas if n.type == "VIEW_3D"][0] override = bpy.context.copy() override['area'] = area bpy.ops.view3d.view_orbit(override, type='ORBITLEFT') ``` [blender.crash.txt](https://archive.blender.org/developer/F12780901/blender.crash.txt)

Heath Mitchell commented

2021-12-29 20:07:13 +01:00

Added subscriber: @circuit10

Heath Mitchell commented

2021-12-29 20:11:11 +01:00

I'm not really a C dev, but I assume this is something to do with the pointer in 594f47ecd2/source/blender/editors/space_view3d/view3d_edit.c (L4210) being wrong, I could also have done something wrong in the script (though should you be able to crash Blender from Python without trying?)

I'm not really a C dev, but I assume this is something to do with the pointer in https://github.com/blender/blender/blob/594f47ecd2d5367ca936cf6fc6ec8168c2b360d0/source/blender/editors/space_view3d/view3d_edit.c#L4210 being wrong, I could also have done something wrong in the script (though should you be able to crash Blender from Python without trying?)

Pratik Borhade commented

2021-12-30 09:03:27 +01:00

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

Pratik Borhade commented

2021-12-30 09:03:32 +01:00

Added subscriber: @PratikPB2123

Michael commented

2021-12-30 14:25:53 +01:00

Added subscriber: @michael64

Michael commented

2021-12-30 14:25:53 +01:00

Thanks @circuit10 for reporting and @PratikPB2123 for confirming.

@circuit10, you are already in the right function that crashes, have a look at rv3d==NULL .
The region looks correct but region->regiondata is NULL so the function crashes here .
If angle would have been M_PI or -M_PI it could have crashed a few lines before.

That is all I can offer right now, there should be no crash but I am not sure if what you are trying to do is supported either.

Thanks @circuit10 for reporting and @PratikPB2123 for confirming. @circuit10, you are already in the right function that crashes, have a look at [rv3d==NULL ](https://github.com/blender/blender/blob/594f47ecd2d5367ca936cf6fc6ec8168c2b360d0/source/blender/editors/space_view3d/view3d_edit.c#L4225;L4232). The region looks correct but region->regiondata is NULL so the function [crashes here ](https://github.com/blender/blender/blob/594f47ecd2d5367ca936cf6fc6ec8168c2b360d0/source/blender/editors/space_view3d/view3d_edit.c#L4232). If angle would have been M_PI or -M_PI it could have crashed a few lines before. That is all I can offer right now, there should be no crash but I am not sure if what you are trying to do is supported either.

Philipp Oeser removed the

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Blender crashes when using bpy.ops.view3d.view_orbit with a custom context #94471