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Crash when sculpting on geometry and dyntopo enabled
Closed, ResolvedPublicBUG

Description

System Information
Operating system: Linux-5.4.0-42-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 440.100

Blender Version
Broken: version: 2.91.0 Alpha, branch: master, commit date: 2020-08-06 15:29, hash: rB97c56b7628d1
Worked: version 2.83.4

Short description of error
blender crash when enabling dyntopo on geometry and start sculpting

Exact steps for others to reproduce the error

  1. create a simple cube
  2. switch to sculpt mode
  3. enable dyntopo
  4. start sculpt on the geometry with mirror modifier Blender Crashes

Event Timeline

Bebin Chandra (bebin) renamed this task from Crash when enabling dynatopo on geometry with mirror modifier to Crash when sculpting on geometry with mirror modifier and enabling dyntopo .Aug 6 2020, 6:34 PM
Bebin Chandra (bebin) updated the task description. (Show Details)

Can confirm. It seems this was caused by 5f5143818591 @Pablo Dobarro (pablodp606).

_BLI_assert_abort() Line 51	C
BM_vert_at_index(BMesh * bm, const int index) Line 102	C
SCULPT_vertex_co_get(SculptSession * ss, int index) Line 145	C
SCULPT_active_vertex_co_get(SculptSession * ss) Line 250	C
SCULPT_cursor_geometry_info_update(bContext * C, SculptCursorGeometryInfo * out, const float * mouse, bool use_sampled_normal) Line 7011	C
paint_cursor_sculpt_session_update_and_init(PaintCursorContext * pcontext) Line 1362	C
paint_cursor_draw_3D_view_brush_cursor(PaintCursorContext * pcontext) Line 1736	C
paint_draw_cursor(bContext * C, int x, int y, void * UNUSED_unused) Line 1857	C
wm_paintcursor_draw(bContext * C, ScrArea * area, ARegion * region) Line 124	C
wm_draw_window_onscreen(bContext * C, wmWindow * win, int view) Line 780	C
wm_draw_window(bContext * C, wmWindow * win) Line 830	C
wm_draw_update(bContext * C) Line 1030	C
WM_main(bContext * C) Line 482	C
main(int argc, const unsigned char * * UNUSED_argv_c) Line 548	C
Robert Guetzkow (rjg) changed the task status from Needs Triage to Confirmed.Aug 6 2020, 7:43 PM
Robert Guetzkow (rjg) triaged this task as High priority.
Philipp Oeser (lichtwerk) renamed this task from Crash when sculpting on geometry with mirror modifier and enabling dyntopo to Crash when sculpting on geometry and dyntopo enabled.Aug 10 2020, 10:32 AM
Philipp Oeser (lichtwerk) changed the subtype of this task from "Report" to "Bug".
Philipp Oeser (lichtwerk) updated the task description. (Show Details)

I have changed the report description, because it also crashes without a mirror modifier.

Still crashes on
2.91.0 Alpha , hash: rB6fe609d4c3d0 , commit date: 2020-08-13 13:24