Blender Crashes if viewport is changed manually while having loop cut selected #77914

New Issue

Amisculesei Cristian Stefan · 2020-06-16T15:25:50+02:00

2020-06-16 15:25:50 +02:00

System Information
Operating system: Win 10 pro 64-bit
Processor: Ryzen 2700X
Graphics card: ASRock Radeon RX 580 Phantom Gaming X OC 8GB
RAM: 32 GB

Error present also on an old build

Operating system: Win 10 pro 64-bit
Processor: Intel® Core™ i5-2450M Processor
Graphics card: GeForce 610M
RAM: 8 GB

Blender Version
Tested in 2.83 and 2.90

Short description of error

Changing viewport while having loop cut tool selected will crash the software
Sometimes it happens after several changes of the viewport

Exact steps for others to reproduce the error
The steps are presented in the video below
After a little more of testing i found out that this issue does not trigger if shortcuts for changing viewport are used 2020-06-16 16-13-00.mkv

**System Information** Operating system: Win 10 pro 64-bit Processor: Ryzen 2700X Graphics card: ASRock Radeon RX 580 Phantom Gaming X OC 8GB RAM: 32 GB Error present also on an old build Operating system: Win 10 pro 64-bit Processor: Intel® Core™ i5-2450M Processor Graphics card: GeForce 610M RAM: 8 GB **Blender Version** Tested in 2.83 and 2.90 **Short description of error** Changing viewport while having loop cut tool selected will crash the software Sometimes it happens after several changes of the viewport **Exact steps for others to reproduce the error** The steps are presented in the video below After a little more of testing i found out that this issue does not trigger if shortcuts for changing viewport are used [2020-06-16 16-13-00.mkv](https://archive.blender.org/developer/F8624975/2020-06-16_16-13-00.mkv)

Amisculesei Cristian Stefan commented

2020-06-16 15:25:50 +02:00

Added subscriber: @p_one_snake

Germano Cavalcante commented

2020-06-17 16:18:17 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2020-06-17 16:18:17 +02:00

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

Germano Cavalcante commented

2020-06-17 16:18:17 +02:00

I can confirm.

Exception thrown: read access violation.
DST.vmempool was nullptr.

>	blender.exe!DRW_view_create(const float[4] * viewmat, const float[4] * winmat, const float[4] * culling_viewmat, const float[4] * culling_winmat, bool(*)(bool, void *) visibility_fn) Line 1655	C

 	blender.exe!drw_viewport_var_init() Line 575	C
 	blender.exe!DRW_draw_select_id(Depsgraph * depsgraph, ARegion * region, View3D * v3d, const rcti * rect) Line 2401	C
 	blender.exe!DRW_select_buffer_read(Depsgraph * depsgraph, ARegion * region, View3D * v3d, const rcti * rect, unsigned int * r_buf_len) Line 77	C
 	blender.exe!DRW_select_buffer_find_nearest_to_point(Depsgraph * depsgraph, ARegion * region, View3D * v3d, const int * center, const unsigned int id_min, const unsigned int id_max, unsigned int * dist) Line 372	C
 	blender.exe!EDBM_edge_find_nearest_ex(ViewContext * vc, float * r_dist, float * r_dist_center, const bool use_select_bias, bool use_cycle, BMEdge * * r_eed_zbuf, Base * * bases, unsigned int bases_len, unsigned int * r_base_index) Line 525	C
 	blender.exe!gizmo_preselect_edgering_test_select(bContext * C, wmGizmo * gz, const int * mval) Line 344	C
 	blender.exe!gizmo_find_intersected_3d(bContext * C, const int * co, wmGizmo * * visible_gizmos, const int visible_gizmos_len, int * r_part) Line 682	C
 	blender.exe!wm_gizmomap_highlight_find(wmGizmoMap * gzmap, bContext * C, const wmEvent * event, int * r_part) Line 793	C
 	blender.exe!wm_handlers_do_gizmo_handler(bContext * C, wmWindowManager * wm, wmEventHandler_Gizmo * handler, wmEvent * event, ListBase * handlers, const bool do_debug_handler) Line 2582	C
 	blender.exe!wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2796	C
 	blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2857	C
 	blender.exe!wm_event_do_handlers(bContext * C) Line 3360	C
 	blender.exe!WM_main(bContext * C) Line 478	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 530	C
 	[External Code]

I can confirm. ``` Exception thrown: read access violation. DST.vmempool was nullptr. ``` ``` > blender.exe!DRW_view_create(const float[4] * viewmat, const float[4] * winmat, const float[4] * culling_viewmat, const float[4] * culling_winmat, bool(*)(bool, void *) visibility_fn) Line 1655 C blender.exe!drw_viewport_var_init() Line 575 C blender.exe!DRW_draw_select_id(Depsgraph * depsgraph, ARegion * region, View3D * v3d, const rcti * rect) Line 2401 C blender.exe!DRW_select_buffer_read(Depsgraph * depsgraph, ARegion * region, View3D * v3d, const rcti * rect, unsigned int * r_buf_len) Line 77 C blender.exe!DRW_select_buffer_find_nearest_to_point(Depsgraph * depsgraph, ARegion * region, View3D * v3d, const int * center, const unsigned int id_min, const unsigned int id_max, unsigned int * dist) Line 372 C blender.exe!EDBM_edge_find_nearest_ex(ViewContext * vc, float * r_dist, float * r_dist_center, const bool use_select_bias, bool use_cycle, BMEdge * * r_eed_zbuf, Base * * bases, unsigned int bases_len, unsigned int * r_base_index) Line 525 C blender.exe!gizmo_preselect_edgering_test_select(bContext * C, wmGizmo * gz, const int * mval) Line 344 C blender.exe!gizmo_find_intersected_3d(bContext * C, const int * co, wmGizmo * * visible_gizmos, const int visible_gizmos_len, int * r_part) Line 682 C blender.exe!wm_gizmomap_highlight_find(wmGizmoMap * gzmap, bContext * C, const wmEvent * event, int * r_part) Line 793 C blender.exe!wm_handlers_do_gizmo_handler(bContext * C, wmWindowManager * wm, wmEventHandler_Gizmo * handler, wmEvent * event, ListBase * handlers, const bool do_debug_handler) Line 2582 C blender.exe!wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2796 C blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2857 C blender.exe!wm_event_do_handlers(bContext * C) Line 3360 C blender.exe!WM_main(bContext * C) Line 478 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 530 C [External Code] ```

blender-admin commented

2020-06-17 17:14:47 +02:00

This issue was referenced by 9bfd78ae14

This issue was referenced by 9bfd78ae146d50f4bf5017a1c3ee7f3dec0c57db

Germano Cavalcante commented

2020-06-17 17:17:20 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Germano Cavalcante closed this issue

2020-06-17 17:17:20 +02:00

Germano Cavalcante self-assigned this 2020-06-17 17:17:20 +02:00

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Blender Crashes if viewport is changed manually while having loop cut selected #77914