Crash on loading blends with nested BG scenes #79575

New Issue

Lars Cawley · 2020-08-06T06:15:51+02:00

Lars Cawley commented

2020-08-06 06:15:51 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14

Blender Version
Broken: version: 2.83.1, branch: master, commit date: 2020-06-25 09:47, hash: 8289fc688b
Worked: (newest version of Blender that worked as expected)

Short description of error
Blender crashes when a file that has linked BG scene that in turn has nested BG scene(s) Three levels of nested BG scenes seems to cause trouble.

Exact steps for others to reproduce the error
1: make a blend (mine has some text at each step as reference), save.
2: link step 1's blend scene into a new blend and set as the BG scene, save.
3: link the blend from step 2's scene into a 3rd blend and set as the BG scene, save.
4: link the blend from step 3's scene into a 4rd blend and set as the BG scene, save.
5: try to load the saved blend from step 4.
Based on an issue we are having with our production files I tried to replicate an crash. I can't say I can reproduce it without fail but I have a series of nest BG scene blends that crash Blender. Up to the 3rd scene seems OK, but the 4th crashes. If I change the names and text the 4th seems OK, but won't save a new text object in the scene.
Crashing_nested_BG_scenes.zip

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 960/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 446.14 **Blender Version** Broken: version: 2.83.1, branch: master, commit date: 2020-06-25 09:47, hash: `8289fc688b` Worked: (newest version of Blender that worked as expected) **Short description of error** Blender crashes when a file that has linked BG scene that in turn has nested BG scene(s) Three levels of nested BG scenes seems to cause trouble. **Exact steps for others to reproduce the error** 1: make a blend (mine has some text at each step as reference), save. 2: link step 1's blend scene into a new blend and set as the BG scene, save. 3: link the blend from step 2's scene into a 3rd blend and set as the BG scene, save. 4: link the blend from step 3's scene into a 4rd blend and set as the BG scene, save. 5: try to load the saved blend from step 4. Based on an issue we are having with our production files I tried to replicate an crash. I can't say I can reproduce it without fail but I have a series of nest BG scene blends that crash Blender. Up to the 3rd scene seems OK, but the 4th crashes. If I change the names and text the 4th seems OK, but won't save a new text object in the scene. [Crashing_nested_BG_scenes.zip](https://archive.blender.org/developer/F8750952/Crashing_nested_BG_scenes.zip)

Lars Cawley commented

2020-08-06 06:15:51 +02:00

Added subscriber: @Dekko_Bokko

Richard Antalik commented

2020-08-06 06:58:55 +02:00

Added subscriber: @iss

Richard Antalik commented

2020-08-06 06:58:55 +02:00

Exception thrown: read access violation. sce_iter was 0x20786D90C98.

>	blender.exe!scene_validate_setscene__liblink(Scene * sce, const int totscene) Line 6090	C

 	blender.exe!lib_link_scenes_check_set(Main * bmain) Line 6289	C
 	blender.exe!lib_link_all(FileData * fd, Main * bmain) Line 9711	C
 	blender.exe!read_libraries(FileData * basefd, ListBase * mainlist) Line 12119	C
 	blender.exe!blo_read_file_internal(FileData * fd, const unsigned char * filepath) Line 9948	C
 	blender.exe!BLO_read_from_file(const unsigned char * filepath, eBLOReadSkip skip_flags, ReportList * reports) Line 320	C
 	blender.exe!BKE_blendfile_read(bContext * C, const unsigned char * filepath, const BlendFileReadParams * params, ReportList * reports) Line 444	C
 	blender.exe!WM_file_read(bContext * C, const unsigned char * filepath, ReportList * reports) Line 712	C
 	blender.exe!wm_file_read_opwrap(bContext * C, const unsigned char * filepath, ReportList * reports, const bool autoexec_init) Line 2177	C
 	blender.exe!wm_open_mainfile__open(bContext * C, wmOperator * op) Line 2319	C
 	blender.exe!operator_state_dispatch(bContext * C, wmOperator * op, OperatorDispatchTarget * targets) Line 2213	C
 	blender.exe!wm_open_mainfile_dispatch(bContext * C, wmOperator * op) Line 2346	C
 	blender.exe!wm_open_mainfile_invoke(bContext * C, wmOperator * op, const wmEvent * UNUSED_event) Line 2351	C
 	blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1284	C
 	blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1532	C
 	blender.exe!WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties) Line 1547	C
 	blender.exe!WM_operator_name_call_with_properties(bContext * C, const unsigned char * opstring, short context, IDProperty * properties) Line 1567	C
 	blender.exe!wm_open_mainfile_after_dialog_callback(bContext * C, void * user_data) Line 2238	C
 	blender.exe!wm_block_file_close_discard(bContext * C, void * arg_block, void * arg_data) Line 3071	C
 	blender.exe!ui_apply_but_funcs_after(bContext * C) Line 922	C
 	blender.exe!ui_popup_handler(bContext * C, const wmEvent * event, void * userdata) Line 10889	C
 	blender.exe!wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, int always_pass) Line 622	C
 	blender.exe!wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2743	C
 	blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2854	C
 	blender.exe!wm_event_do_handlers(bContext * C) Line 3283	C
 	blender.exe!WM_main(bContext * C) Line 478	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 548	C
 	[External Code]

`Exception thrown: read access violation. sce_iter was 0x20786D90C98.` ``` > blender.exe!scene_validate_setscene__liblink(Scene * sce, const int totscene) Line 6090 C blender.exe!lib_link_scenes_check_set(Main * bmain) Line 6289 C blender.exe!lib_link_all(FileData * fd, Main * bmain) Line 9711 C blender.exe!read_libraries(FileData * basefd, ListBase * mainlist) Line 12119 C blender.exe!blo_read_file_internal(FileData * fd, const unsigned char * filepath) Line 9948 C blender.exe!BLO_read_from_file(const unsigned char * filepath, eBLOReadSkip skip_flags, ReportList * reports) Line 320 C blender.exe!BKE_blendfile_read(bContext * C, const unsigned char * filepath, const BlendFileReadParams * params, ReportList * reports) Line 444 C blender.exe!WM_file_read(bContext * C, const unsigned char * filepath, ReportList * reports) Line 712 C blender.exe!wm_file_read_opwrap(bContext * C, const unsigned char * filepath, ReportList * reports, const bool autoexec_init) Line 2177 C blender.exe!wm_open_mainfile__open(bContext * C, wmOperator * op) Line 2319 C blender.exe!operator_state_dispatch(bContext * C, wmOperator * op, OperatorDispatchTarget * targets) Line 2213 C blender.exe!wm_open_mainfile_dispatch(bContext * C, wmOperator * op) Line 2346 C blender.exe!wm_open_mainfile_invoke(bContext * C, wmOperator * op, const wmEvent * UNUSED_event) Line 2351 C blender.exe!wm_operator_invoke(bContext * C, wmOperatorType * ot, wmEvent * event, PointerRNA * properties, ReportList * reports, const bool poll_only, bool use_last_properties) Line 1284 C blender.exe!wm_operator_call_internal(bContext * C, wmOperatorType * ot, PointerRNA * properties, ReportList * reports, const short context, const bool poll_only, wmEvent * event) Line 1532 C blender.exe!WM_operator_name_call_ptr(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties) Line 1547 C blender.exe!WM_operator_name_call_with_properties(bContext * C, const unsigned char * opstring, short context, IDProperty * properties) Line 1567 C blender.exe!wm_open_mainfile_after_dialog_callback(bContext * C, void * user_data) Line 2238 C blender.exe!wm_block_file_close_discard(bContext * C, void * arg_block, void * arg_data) Line 3071 C blender.exe!ui_apply_but_funcs_after(bContext * C) Line 922 C blender.exe!ui_popup_handler(bContext * C, const wmEvent * event, void * userdata) Line 10889 C blender.exe!wm_handler_ui_call(bContext * C, wmEventHandler_UI * handler, const wmEvent * event, int always_pass) Line 622 C blender.exe!wm_handlers_do_intern(bContext * C, wmEvent * event, ListBase * handlers) Line 2743 C blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 2854 C blender.exe!wm_event_do_handlers(bContext * C) Line 3283 C blender.exe!WM_main(bContext * C) Line 478 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 548 C [External Code] ```

Richard Antalik commented

2020-08-06 07:03:15 +02:00

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

Lars Cawley commented

2020-08-06 07:03:42 +02:00

Yes, I am sorry about the file naming. I can replicate the crash by linking the linking_scene.blend's scene into a fresh blend and setting it to the background, saving and then attempting to open it. The linking_scene.blend itself opens fine.

blender-admin commented

2020-08-06 09:12:45 +02:00

This issue was referenced by 5c917ef032

This issue was referenced by 5c917ef0323a3741216d696af09b53b4025abb78

blender-admin commented

2020-08-06 09:12:45 +02:00

This issue was referenced by d4804f00fb

This issue was referenced by d4804f00fbbd6da311c49b2ae498a4cadf9efe92

Campbell Barton commented

2020-08-06 09:15:58 +02:00

Changed status from 'Confirmed' to: 'Resolved'

Campbell Barton closed this issue

2020-08-06 09:15:58 +02:00

Campbell Barton self-assigned this 2020-08-06 09:15:58 +02:00

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Crash on loading blends with nested BG scenes #79575