Regression: Enabling Dynamic Topology Causes Crash on Plane Mesh #102336

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Takanu · 2022-11-07T18:13:13+01:00

Takanu commented

2022-11-07 18:13:13 +01:00

System Information
Operating system: Windows 11 Pro 22621.675 (22H2)
Graphics card: NVIDIA GeForce GTX 1060 3GB

Blender Version
Broken: Blender 3.4 bba6d28942
Worked: 3.3.1 LTS

Seems to be caused by {d7cfb6ac71e4225a654487ab134c89051dad03ed}
Issue is not 100% reproducible, but parent hash seems to be fine.

Short description of error
When attempting to enable Dynamic Topology on a Plane mesh object, Blender will crash. This does not occur in 3.3.1 LTS.

Exact steps for others to reproduce the error

Create a new File
Add a Plane Mesh Object
Enter Sculpt Mode
Turn on Dynamic Topology and press Ok when a warning appears

Blender should(~80% chance) crash.

This doesn't occur with enclosed objects like Cubes\
This does not occur with non-manifold meshes
This DOES occur when creating a plane by deleting all but one side of a cube

**System Information** Operating system: Windows 11 Pro 22621.675 (22H2) Graphics card: NVIDIA GeForce GTX 1060 3GB **Blender Version** Broken: Blender 3.4 bba6d2894290 Worked: 3.3.1 LTS Seems to be caused by {d7cfb6ac71e4225a654487ab134c89051dad03ed} Issue is not 100% reproducible, but parent hash seems to be fine. **Short description of error** When attempting to enable Dynamic Topology on a Plane mesh object, Blender will crash. This does not occur in 3.3.1 LTS. **Exact steps for others to reproduce the error** * Create a new File * Add a Plane Mesh Object * Enter Sculpt Mode * Turn on Dynamic Topology and press Ok when a warning appears Blender should(~80% chance) crash. * This doesn't occur with enclosed objects like Cubes\ * This does not occur with non-manifold meshes * This DOES occur when creating a plane by deleting all but one side of a cube

Takanu commented

2022-11-07 18:13:13 +01:00

Added subscriber: @Takanu

TheRedWaxPolice commented

2022-11-07 20:06:18 +01:00

Added subscriber: @TheRedWaxPolice

TheRedWaxPolice commented

2022-11-07 20:06:18 +01:00

Yep, I can confirm the crash in 3.5 alpha as well... blender-3.5.0-alpha+master.4a313b82529b-windows.amd64-release

Yep, I can confirm the crash in 3.5 alpha as well... `blender-3.5.0-alpha+master.4a313b82529b-windows.amd64-release`

Richard Antalik commented

2022-11-07 20:08:01 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-11-07 20:08:01 +01:00

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

Richard Antalik commented

2022-11-07 20:08:01 +01:00

Read access violation at:

>	blender.exe!copy_v3_v3(float * r, const float * a) Line 44	C

 	blender.exe!SCULPT_cursor_geometry_info_update(bContext * C, SculptCursorGeometryInfo * out, const float * mval, bool use_sampled_normal) Line 4995	C
 	blender.exe!paint_cursor_sculpt_session_update_and_init(PaintCursorContext * pcontext) Line 1369	C
 	blender.exe!paint_cursor_draw_3D_view_brush_cursor(PaintCursorContext * pcontext) Line 1806	C
 	blender.exe!paint_draw_cursor(bContext * C, int x, int y, void * UNUSED_unused) Line 1927	C
 	blender.exe!wm_paintcursor_draw(bContext * C, ScrArea * area, ARegion * region) Line 115	C
 	blender.exe!wm_draw_window_onscreen(bContext * C, wmWindow * win, int view) Line 1041	C
 	blender.exe!wm_draw_window(bContext * C, wmWindow * win) Line 1117	C
 	blender.exe!wm_draw_update(bContext * C) Line 1372	C
 	blender.exe!WM_main(bContext * C) Line 647	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 579	C

Since 3.3 beta is not crashing, this should be introduced from master freeze to ca172677b1a7

Read access violation at: ``` > blender.exe!copy_v3_v3(float * r, const float * a) Line 44 C blender.exe!SCULPT_cursor_geometry_info_update(bContext * C, SculptCursorGeometryInfo * out, const float * mval, bool use_sampled_normal) Line 4995 C blender.exe!paint_cursor_sculpt_session_update_and_init(PaintCursorContext * pcontext) Line 1369 C blender.exe!paint_cursor_draw_3D_view_brush_cursor(PaintCursorContext * pcontext) Line 1806 C blender.exe!paint_draw_cursor(bContext * C, int x, int y, void * UNUSED_unused) Line 1927 C blender.exe!wm_paintcursor_draw(bContext * C, ScrArea * area, ARegion * region) Line 115 C blender.exe!wm_draw_window_onscreen(bContext * C, wmWindow * win, int view) Line 1041 C blender.exe!wm_draw_window(bContext * C, wmWindow * win) Line 1117 C blender.exe!wm_draw_update(bContext * C) Line 1372 C blender.exe!WM_main(bContext * C) Line 647 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 579 C ``` Since 3.3 beta is not crashing, this should be introduced from master freeze to `ca172677b1a7`

Richard Antalik changed title from ~~Enabling Dynamic Topology Causes Crash on Plane Mesh~~ to Regression: Enabling Dynamic Topology Causes Crash on Plane Mesh

2022-11-07 20:08:18 +01:00

Pratik Borhade commented

2022-11-08 07:25:58 +01:00

Added subscriber: @JosephEagar