Crashes playing Alembic with empty frames and velocities #94713

New Issue

Valentin Bonhomme · 2022-01-07T13:35:54+01:00

Valentin Bonhomme commented

2022-01-07 13:35:54 +01:00

System Information
Operating system: Linux-5.4.0-91-generic-x86_64-with-glibc2.31 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.91.03

Blender Version
Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: f1cca30557
Broken: version: 3.1.0-alpha, branch: master, commit date: 2022-01-06 23:21, hash: e6ca0b33e920
Worked: version:2.92, branch: master, commit date:2021-02-24 16:25, hash: '02948a2cab44'

Short description of error
Blender crashes when I tried to play an Alembic file containing velocities and some empty frame.

Exact steps for others to reproduce the error
To reproduce the error please change the frame rate to 30 fps. Then import the Alembic file attached, and play the sequence. Blender crashes at the frame 42.

The frame 42 is the first 'empty' frame of the sequence (frame with 0 vertices).
Moreover, if remove the 'Velocity Attribute' in the MeshSequenceCache, Blender doesn't crashes.

table_velocities.abc

**System Information** Operating system: Linux-5.4.0-91-generic-x86_64-with-glibc2.31 64 Bits Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.91.03 **Blender Version** Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: `f1cca30557` Broken: version: 3.1.0-alpha, branch: master, commit date: 2022-01-06 23:21, hash: `e6ca0b33e920` Worked: version:2.92, branch: master, commit date:2021-02-24 16:25, hash: '02948a2cab44' **Short description of error** Blender crashes when I tried to play an Alembic file containing velocities and some empty frame. **Exact steps for others to reproduce the error** To reproduce the error please change the frame rate to 30 fps. Then import the Alembic file attached, and play the sequence. Blender crashes at the frame 42. The frame 42 is the first 'empty' frame of the sequence (frame with 0 vertices). Moreover, if remove the 'Velocity Attribute' in the MeshSequenceCache, Blender doesn't crashes. [table_velocities.abc](https://archive.blender.org/developer/F12792880/table_velocities.abc)

Valentin Bonhomme commented

2022-01-07 13:35:54 +01:00

Added subscriber: @ValentinBonhomme

Richard Antalik commented

2022-01-08 08:05:24 +01:00

Added subscriber: @iss

Richard Antalik commented

2022-01-08 08:05:24 +01:00

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

Richard Antalik commented

2022-01-08 08:05:24 +01:00

Can confirm crash on assert BLI_assert(num_velocity_vectors == config.mesh->totvert)

>	blender.exe!blender::io::alembic::read_velocity(const std::shared_ptr<Alembic::Abc::v12::TypedArraySample<Alembic::Abc::v12::V3fTPTraits>> & velocities, const blender::io::alembic::CDStreamConfig & config, const float velocity_scale) Line 471	C++

 	blender.exe!blender::io::alembic::read_mesh_sample(const std::string & iobject_full_name, blender::io::alembic::ImportSettings * settings, const Alembic::AbcGeom::v12::IPolyMeshSchema & schema, const Alembic::Abc::v12::ISampleSelector & selector, blender::io::alembic::CDStreamConfig & config) Line 522	C++
 	blender.exe!blender::io::alembic::AbcMeshReader::read_mesh(Mesh * existing_mesh, const Alembic::Abc::v12::ISampleSelector & sample_sel, int read_flag, const char * velocity_name, float velocity_scale, const char * * err_str) Line 775	C++
 	blender.exe!ABC_read_mesh(CacheReader * reader, Object * ob, Mesh * existing_mesh, float time, const char * * err_str, int read_flag, const char * velocity_name, float velocity_scale) Line 801	C++
 	blender.exe!modifyMesh(ModifierData * md, const ModifierEvalContext * ctx, Mesh * mesh) Line 241	C
 	blender.exe!BKE_modifier_modify_mesh(ModifierData * md, const ModifierEvalContext * ctx, Mesh * me) Line 999	C
 	blender.exe!modifier_modify_mesh_and_geometry_set(ModifierData * md, const ModifierEvalContext & mectx, Mesh * input_mesh, GeometrySet & geometry_set) Line 875	C++
 	blender.exe!mesh_calc_modifiers(Depsgraph * depsgraph, Scene * scene, Object * ob, const bool use_deform, const bool need_mapping, const CustomData_MeshMasks * dataMask, const int index, const bool use_cache, const bool allow_shared_mesh, Mesh * * r_deform, Mesh * * r_final, GeometrySet * * r_geometry_set) Line 1224	C++
 	blender.exe!mesh_build_data(Depsgraph * depsgraph, Scene * scene, Object * ob, const CustomData_MeshMasks * dataMask, const bool need_mapping) Line 1866	C++
 	blender.exe!makeDerivedMesh(Depsgraph * depsgraph, Scene * scene, Object * ob, BMEditMesh * em, const CustomData_MeshMasks * dataMask) Line 1996	C++
 	blender.exe!BKE_object_handle_data_update(Depsgraph * depsgraph, Scene * scene, Object * ob) Line 196	C
 	blender.exe!BKE_object_eval_uber_data(Depsgraph * depsgraph, Scene * scene, Object * ob) Line 393	C
 	blender.exe!blender::deg::DepsgraphNodeBuilder::build_object_data_geometry::__l2::<lambda>(Depsgraph * depsgraph) Line 1503	C++
 	[External Code]	
 	blender.exe!blender::deg::`anonymous namespace'::evaluate_node(const blender::deg::`anonymous-namespace'::DepsgraphEvalState * state, blender::deg::OperationNode * operation_node) Line 120	C++
 	blender.exe!blender::deg::`anonymous namespace'::deg_task_run_func(TaskPool * pool, void * taskdata) Line 132	C++
 	blender.exe!Task::operator()() Line 179	C++
 	blender.exe!tbb::internal::function_task<Task>::execute() Line 1060	C++
 	[External Code]	
 	blender.exe!tbb::task::wait_for_all() Line 821	C++
 	blender.exe!tbb::internal::task_group_base::wait() Line 168	C++
 	blender.exe!tbb_task_pool_work_and_wait(TaskPool * pool) Line 254	C++
 	blender.exe!BLI_task_pool_work_and_wait(TaskPool * pool) Line 501	C++
 	blender.exe!blender::deg::deg_evaluate_on_refresh(blender::deg::Depsgraph * graph) Line 401	C++
 	blender.exe!deg_flush_updates_and_refresh(blender::deg::Depsgraph * deg_graph) Line 61	C++
 	blender.exe!DEG_evaluate_on_framechange(Depsgraph * graph, float frame) Line 88	C++
 	blender.exe!BKE_scene_graph_update_for_newframe_ex(Depsgraph * depsgraph, const bool clear_recalc) Line 2664	C
 	blender.exe!BKE_scene_graph_update_for_newframe(Depsgraph * depsgraph) Line 2712	C
 	blender.exe!ED_update_for_newframe(Main * bmain, Depsgraph * depsgraph) Line 1729	C
 	blender.exe!screen_animation_step_invoke(bContext * C, wmOperator * UNUSED_op, const wmEvent * event) Line 4738	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 1313	C
 	blender.exe!wm_handler_operator_call(bContext * C, ListBase * handlers, wmEventHandler * handler_base, wmEvent * event, PointerRNA * properties, const unsigned char * kmi_idname) Line 2314	C
 	blender.exe!wm_handlers_do_keymap_with_keymap_handler(bContext * C, wmEvent * event, ListBase * handlers, wmEventHandler_Keymap * handler, wmKeyMap * keymap, const bool do_debug_handler) Line 2667	C
 	blender.exe!wm_handlers_do_intern(bContext * C, wmWindow * win, wmEvent * event, ListBase * handlers) Line 2994	C
 	blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 3129	C
 	blender.exe!wm_event_do_handlers(bContext * C) Line 3725	C
 	blender.exe!WM_main(bContext * C) Line 642	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 564	C
 	[External Code]

Can confirm crash on assert `BLI_assert(num_velocity_vectors == config.mesh->totvert)` ``` > blender.exe!blender::io::alembic::read_velocity(const std::shared_ptr<Alembic::Abc::v12::TypedArraySample<Alembic::Abc::v12::V3fTPTraits>> & velocities, const blender::io::alembic::CDStreamConfig & config, const float velocity_scale) Line 471 C++ blender.exe!blender::io::alembic::read_mesh_sample(const std::string & iobject_full_name, blender::io::alembic::ImportSettings * settings, const Alembic::AbcGeom::v12::IPolyMeshSchema & schema, const Alembic::Abc::v12::ISampleSelector & selector, blender::io::alembic::CDStreamConfig & config) Line 522 C++ blender.exe!blender::io::alembic::AbcMeshReader::read_mesh(Mesh * existing_mesh, const Alembic::Abc::v12::ISampleSelector & sample_sel, int read_flag, const char * velocity_name, float velocity_scale, const char * * err_str) Line 775 C++ blender.exe!ABC_read_mesh(CacheReader * reader, Object * ob, Mesh * existing_mesh, float time, const char * * err_str, int read_flag, const char * velocity_name, float velocity_scale) Line 801 C++ blender.exe!modifyMesh(ModifierData * md, const ModifierEvalContext * ctx, Mesh * mesh) Line 241 C blender.exe!BKE_modifier_modify_mesh(ModifierData * md, const ModifierEvalContext * ctx, Mesh * me) Line 999 C blender.exe!modifier_modify_mesh_and_geometry_set(ModifierData * md, const ModifierEvalContext & mectx, Mesh * input_mesh, GeometrySet & geometry_set) Line 875 C++ blender.exe!mesh_calc_modifiers(Depsgraph * depsgraph, Scene * scene, Object * ob, const bool use_deform, const bool need_mapping, const CustomData_MeshMasks * dataMask, const int index, const bool use_cache, const bool allow_shared_mesh, Mesh * * r_deform, Mesh * * r_final, GeometrySet * * r_geometry_set) Line 1224 C++ blender.exe!mesh_build_data(Depsgraph * depsgraph, Scene * scene, Object * ob, const CustomData_MeshMasks * dataMask, const bool need_mapping) Line 1866 C++ blender.exe!makeDerivedMesh(Depsgraph * depsgraph, Scene * scene, Object * ob, BMEditMesh * em, const CustomData_MeshMasks * dataMask) Line 1996 C++ blender.exe!BKE_object_handle_data_update(Depsgraph * depsgraph, Scene * scene, Object * ob) Line 196 C blender.exe!BKE_object_eval_uber_data(Depsgraph * depsgraph, Scene * scene, Object * ob) Line 393 C blender.exe!blender::deg::DepsgraphNodeBuilder::build_object_data_geometry::__l2::<lambda>(Depsgraph * depsgraph) Line 1503 C++ [External Code] blender.exe!blender::deg::`anonymous namespace'::evaluate_node(const blender::deg::`anonymous-namespace'::DepsgraphEvalState * state, blender::deg::OperationNode * operation_node) Line 120 C++ blender.exe!blender::deg::`anonymous namespace'::deg_task_run_func(TaskPool * pool, void * taskdata) Line 132 C++ blender.exe!Task::operator()() Line 179 C++ blender.exe!tbb::internal::function_task<Task>::execute() Line 1060 C++ [External Code] blender.exe!tbb::task::wait_for_all() Line 821 C++ blender.exe!tbb::internal::task_group_base::wait() Line 168 C++ blender.exe!tbb_task_pool_work_and_wait(TaskPool * pool) Line 254 C++ blender.exe!BLI_task_pool_work_and_wait(TaskPool * pool) Line 501 C++ blender.exe!blender::deg::deg_evaluate_on_refresh(blender::deg::Depsgraph * graph) Line 401 C++ blender.exe!deg_flush_updates_and_refresh(blender::deg::Depsgraph * deg_graph) Line 61 C++ blender.exe!DEG_evaluate_on_framechange(Depsgraph * graph, float frame) Line 88 C++ blender.exe!BKE_scene_graph_update_for_newframe_ex(Depsgraph * depsgraph, const bool clear_recalc) Line 2664 C blender.exe!BKE_scene_graph_update_for_newframe(Depsgraph * depsgraph) Line 2712 C blender.exe!ED_update_for_newframe(Main * bmain, Depsgraph * depsgraph) Line 1729 C blender.exe!screen_animation_step_invoke(bContext * C, wmOperator * UNUSED_op, const wmEvent * event) Line 4738 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 1313 C blender.exe!wm_handler_operator_call(bContext * C, ListBase * handlers, wmEventHandler * handler_base, wmEvent * event, PointerRNA * properties, const unsigned char * kmi_idname) Line 2314 C blender.exe!wm_handlers_do_keymap_with_keymap_handler(bContext * C, wmEvent * event, ListBase * handlers, wmEventHandler_Keymap * handler, wmKeyMap * keymap, const bool do_debug_handler) Line 2667 C blender.exe!wm_handlers_do_intern(bContext * C, wmWindow * win, wmEvent * event, ListBase * handlers) Line 2994 C blender.exe!wm_handlers_do(bContext * C, wmEvent * event, ListBase * handlers) Line 3129 C blender.exe!wm_event_do_handlers(bContext * C) Line 3725 C blender.exe!WM_main(bContext * C) Line 642 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 564 C [External Code] ```

blender-admin commented

2022-01-08 20:46:28 +01:00

This issue was referenced by 45bc4e3209

This issue was referenced by 45bc4e320970f3d7f952fd0d0fa762322d407bd7

Kévin Dietrich commented

2022-01-08 20:46:58 +01:00

Changed status from 'Confirmed' to: 'Resolved'

Kévin Dietrich closed this issue

2022-01-08 20:46:58 +01:00

Kévin Dietrich self-assigned this 2022-01-08 20:46:58 +01:00

Valentin Bonhomme commented

2022-01-10 09:05:14 +01:00

Thanks Kevin and Richard !
Great support team !

Thanks Kevin and Richard ! Great support team !

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Crashes playing Alembic with empty frames and velocities #94713