Blender crashes when in the Multresolution modifier we increase the number of subdivisions #80039

New Issue

nazir · 2020-08-23T13:12:52+02:00

nazir commented

2020-08-23 13:12:52 +02:00

System Information
Operating system: Windows-10-10.0.14393-SP0 64 Bits
Graphics card: GeForce GTX 1050 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14

Blender Version
Broken:
version: 2.83.5, branch: master, commit date: 2020-08-19 06:07, hash: c2b144df39
version: 2.91.0 Alpha, branch: master, commit date: 2020-08-13 18:18, hash: 275f1039d2
Worked:
version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: 26bd5ebd42
version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: 375c7dc4ca

Short description of error

Create three connected vertices in the object and add the Multiresolution modifier. By increasing the number of subdivisions, Blender falls. If we extrude polygons and add a subdivision everything works correctly.

Exact steps for others to reproduce the error

Create an object from three connected vertices
Add the Multiresolution modifier to the object
I increase the number of subdivisions (although I checked in Blender 2.82 this action is blocked and Blender does not crash).
Blender crashes without error message.

The problem is solved in prohibiting the increase of the unit if the object does not have solid polygons.
There is no such error in Blender 2.82.

**System Information** Operating system: Windows-10-10.0.14393-SP0 64 Bits Graphics card: GeForce GTX 1050 with Max-Q Design/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14 **Blender Version** Broken: version: 2.83.5, branch: master, commit date: 2020-08-19 06:07, hash: `c2b144df39` version: 2.91.0 Alpha, branch: master, commit date: 2020-08-13 18:18, hash: `275f1039d2` Worked: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: `26bd5ebd42` version: 2.82 (sub 7), branch: master, commit date: 2020-03-12 05:06, hash: `375c7dc4ca` **Short description of error** Create three connected vertices in the object and add the Multiresolution modifier. By increasing the number of subdivisions, Blender falls. If we extrude polygons and add a subdivision everything works correctly. **Exact steps for others to reproduce the error** 1. Create an object from three connected vertices 2. Add the Multiresolution modifier to the object 3. I increase the number of subdivisions (although I checked in Blender 2.82 this action is blocked and Blender does not crash). 4. Blender crashes without error message. The problem is solved in prohibiting the increase of the unit if the object does not have solid polygons. There is no such error in Blender 2.82.

nazir commented

2020-08-23 13:12:52 +02:00

Added subscriber: @aicedor

Robert Guetzkow commented

2020-08-23 15:29:11 +02:00

Added subscriber: @rjg

Robert Guetzkow commented

2020-08-23 15:29:11 +02:00

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

Robert Guetzkow commented

2020-08-23 15:29:11 +02:00

The crash happens when adding the second subdivision. reshape_context->subdiv is NULL which triggers the assert in context_init_commoon (multires_reshape_util.c ).

BTW the function name has a typo, it should be context_init_common.

context_init_commoon(MultiresReshapeContext * reshape_context) Line 128	C
multires_reshape_context_create_from_subdivide(MultiresReshapeContext * reshape_context, Object * object, MultiresModifierData * mmd, int top_level) Line 269	C
multiresModifier_subdivide_to_level(Object * object, MultiresModifierData * mmd, const int top_level, const eMultiresSubdivideModeType mode) Line 222	C
multiresModifier_subdivide(Object * object, MultiresModifierData * mmd, const eMultiresSubdivideModeType mode) Line 180	C
multires_subdivide_exec(bContext * C, wmOperator * op) Line 1694	C
wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1312	C
wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1547	C
WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties) Line 1562	C
ui_apply_but_funcs_after(bContext * C) Line 907	C
ui_handler_region_menu(bContext * C, const wmEvent * event, void * UNUSED_userdata) Line 10843	C
wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, int always_pass) Line 638	C
wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2754	C
wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2865	C
wm_event_do_handlers(bContext * C) Line 3289	C
WM_main(bContext * C) Line 479	C
main(int argc, const unsigned char * * UNUSED_argv_c) Line 548	C

The crash happens when adding the second subdivision. `reshape_context->subdiv` is `NULL` which triggers the assert in `context_init_commoon` ([multires_reshape_util.c ](https://developer.blender.org/diffusion/B/browse/master/source/blender/blenkernel/intern/multires_reshape_util.c)). BTW the function name has a typo, it should be `context_init_common`. ``` context_init_commoon(MultiresReshapeContext * reshape_context) Line 128 C multires_reshape_context_create_from_subdivide(MultiresReshapeContext * reshape_context, Object * object, MultiresModifierData * mmd, int top_level) Line 269 C multiresModifier_subdivide_to_level(Object * object, MultiresModifierData * mmd, const int top_level, const eMultiresSubdivideModeType mode) Line 222 C multiresModifier_subdivide(Object * object, MultiresModifierData * mmd, const eMultiresSubdivideModeType mode) Line 180 C multires_subdivide_exec(bContext * C, wmOperator * op) Line 1694 C wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1312 C wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1547 C WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties) Line 1562 C ui_apply_but_funcs_after(bContext * C) Line 907 C ui_handler_region_menu(bContext * C, const wmEvent * event, void * UNUSED_userdata) Line 10843 C wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, int always_pass) Line 638 C wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2754 C wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2865 C wm_event_do_handlers(bContext * C) Line 3289 C WM_main(bContext * C) Line 479 C main(int argc, const unsigned char * * UNUSED_argv_c) Line 548 C ```

blender-admin commented

2020-08-24 18:26:28 +02:00

This issue was referenced by dc61f7c171

This issue was referenced by dc61f7c17178372e1c52d0e2e3ee8297d36d91b9

blender-admin commented

2020-08-24 18:26:28 +02:00

This issue was referenced by 1bced5884c

This issue was referenced by 1bced5884c3dd80c74dfdcf621eae3b90d32a662

Pablo Dobarro commented

2020-08-24 18:28:56 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Pablo Dobarro closed this issue

2020-08-24 18:28:56 +02:00

Pablo Dobarro self-assigned this 2020-08-24 18:28:56 +02:00

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Blender crashes when in the Multresolution modifier we increase the number of subdivisions #80039