Blender crashes when I import an .OBJ file during a frame_change_pre callback while rendering an animation #74216

New Issue

Justin Jensen · 2020-02-26T00:57:04+01:00

Justin Jensen commented

2020-02-26 00:57:04 +01:00

System Information
Operating system: Windows 10, 64-bit
Graphics card: NVIDIA Quadro M1200

Blender Version
Broken: 2.82

Short description of error
If I try to import an OBJ file in a frame_change_pre callback function while rendering an animation, Blender crashes after a few frames.

Exact steps for others to reproduce the error
Start Blender in debug mode: ./blender.exe --debug --debug-memory --debug-python
Get a hold of a sequence of .OBJ files, each with file numbers (e.g. mesh_0.obj, mesh_1.obj, mesh_2.obj, etc.): https:*drive.google.com/open?id=11OGN-H6K9QgtDgBTXSRQ0nMCvNZuBcz8
Create a script, add the following code, providing a path to your mesh sequence:

import bpy
import os
def load_mesh(dummy):
    frameNum = bpy.context.scene.frame_current
    filePath = os.path.join("path\to\file", "filePrefix_" + str(frameNum) + ".obj")
    bpy.ops.import_scene.obj(filepath=filePath)

bpy.app.handlers.frame_change_pre.append(load_mesh)

Click the "Run Script" button

Start rendering an animation (Ctrl+F12). After a few frames, Blender will crash. The console sometimes has the following error:

mesh_ensure_tessellation_customdata: warning! Tessellation uvs or vcol data got out of sync, had to reset!
    CD_MTFACE: 0 != CD_MLOOPUV: 1 || CD_MCOL: 0 != CD_MLOOPCOL: 0

I also get this error in every case:

Error   : EXCEPTION_ACCESS_VIOLATION
Address : 0x00007FF7853369BF
Module  : C:\Program Files\Blender Foundation\Blender 2.82\blender.exe

This script works fine if I play the animation in the 3D viewport, but fails and crashes when I try to run it while rendering an animation.

**System Information** Operating system: Windows 10, 64-bit Graphics card: NVIDIA Quadro M1200 **Blender Version** Broken: 2.82 **Short description of error** If I try to import an OBJ file in a frame_change_pre callback function while rendering an animation, Blender crashes after a few frames. **Exact steps for others to reproduce the error** Start Blender in debug mode: `./blender.exe --debug --debug-memory --debug-python` Get a hold of a sequence of .OBJ files, each with file numbers (e.g. mesh_0.obj, mesh_1.obj, mesh_2.obj, etc.): [https:*drive.google.com/open?id=11OGN-H6K9QgtDgBTXSRQ0nMCvNZuBcz8](https:*drive.google.com/open?id=11OGN-H6K9QgtDgBTXSRQ0nMCvNZuBcz8) Create a script, add the following code, providing a path to your mesh sequence: ``` import bpy import os def load_mesh(dummy): frameNum = bpy.context.scene.frame_current filePath = os.path.join("path\to\file", "filePrefix_" + str(frameNum) + ".obj") bpy.ops.import_scene.obj(filepath=filePath) bpy.app.handlers.frame_change_pre.append(load_mesh) ``` Click the "Run Script" button Start rendering an animation (Ctrl+F12). After a few frames, Blender will crash. The console sometimes has the following error: ``` mesh_ensure_tessellation_customdata: warning! Tessellation uvs or vcol data got out of sync, had to reset! CD_MTFACE: 0 != CD_MLOOPUV: 1 || CD_MCOL: 0 != CD_MLOOPCOL: 0 ``` I also get this error in every case: ``` Error : EXCEPTION_ACCESS_VIOLATION Address : 0x00007FF7853369BF Module : C:\Program Files\Blender Foundation\Blender 2.82\blender.exe ``` This script works fine if I play the animation in the 3D viewport, but fails and crashes when I try to run it while rendering an animation.

Justin Jensen commented

2020-02-26 00:57:04 +01:00

Added subscriber: @JustinJensen

Richard Antalik commented

2020-02-26 14:14:42 +01:00

Added subscriber: @iss

Richard Antalik commented

2020-02-26 14:14:42 +01:00

Can you please upload animation to site, where registration is not required? Like google docs for example.

Justin Jensen commented

2020-02-26 15:59:57 +01:00

Here's a Google drive link to that horse .OBJ sequence: https:*drive.google.com/open?id=11OGN-H6K9QgtDgBTXSRQ0nMCvNZuBcz8

Here's a Google drive link to that horse .OBJ sequence: [https:*drive.google.com/open?id=11OGN-H6K9QgtDgBTXSRQ0nMCvNZuBcz8](https:*drive.google.com/open?id=11OGN-H6K9QgtDgBTXSRQ0nMCvNZuBcz8)

Richard Antalik commented

2020-02-26 19:17:13 +01:00

crash on frame 10, because only on 10th frame mesh is actually loaded

crashed (thread):

id_node was freed

>	blender.exe!DEG_graph_tag_relations_update(Depsgraph * graph) Line 487	C++

 	blender.exe!DEG_relations_tag_update(Main * bmain) Line 508	C++
 	blender.exe!rna_Material_use_nodes_update(bContext * C, PointerRNA * ptr) Line 201	C
 	blender.exe!rna_property_update(bContext * C, Main * bmain, Scene * scene, PointerRNA * ptr, PropertyRNA * prop) Line 2235	C
 	blender.exe!RNA_property_update(bContext * C, PointerRNA * ptr, PropertyRNA * prop) Line 2304	C
 	blender.exe!pyrna_py_to_prop(PointerRNA * ptr, PropertyRNA * prop, void * data, _object * value, const unsigned char * error_prefix) Line 2208	C
 	blender.exe!pyrna_struct_setattro(BPy_StructRNA * self, _object * pyname, _object * value) Line 4521	C
 	[Externí kód]	
 	blender.exe!bpy_class_call(bContext * C, PointerRNA * ptr, FunctionRNA * func, ParameterList * parms) Line 8325	C
 	blender.exe!rna_operator_execute_cb(bContext * C, wmOperator * op) Line 1307	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 1279	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 1514	C
 	blender.exe!WM_operator_call_py(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties, ReportList * reports, const bool is_undo) Line 1614	C
 	blender.exe!pyop_call(_object * UNUSED_self, _object * args) Line 268	C
 	[Externí kód]	
 	blender.exe!bpy_app_generic_callback(Main * UNUSED_main, PointerRNA * * pointers, const int num_pointers, void * arg) Line 344	C
 	blender.exe!BKE_callback_exec(Main * bmain, PointerRNA * * pointers, const int num_pointers, eCbEvent evt) Line 43	C
 	blender.exe!BKE_callback_exec_id(Main * bmain, ID * id, eCbEvent evt) Line 59	C
 	blender.exe!BKE_scene_graph_update_for_newframe(Depsgraph * depsgraph, Main * bmain) Line 1412	C
 	blender.exe!engine_depsgraph_init(RenderEngine * engine, ViewLayer * view_layer) Line 525	C
 	blender.exe!RE_engine_render(Render * re, int do_all) Line 770	C
 	blender.exe!do_render_3d(Render * re) Line 1166	C
 	blender.exe!do_render(Render * re) Line 1245	C
 	blender.exe!do_render_composite(Render * re) Line 1464	C
 	blender.exe!do_render_all_options(Render * re) Line 1729	C
 	blender.exe!RE_RenderAnim(Render * re, Main * bmain, Scene * scene, ViewLayer * single_layer, Object * camera_override, int sfra, int efra, int tfra) Line 2689	C
 	blender.exe!render_startjob(void * rjv, short * stop, short * do_update, float * progress) Line 668	C
 	blender.exe!do_job_thread(void * job_v) Line 384	C
 	blender.exe!tslot_thread_start(void * tslot_p) Line 261	C
 	[Externí kód]

main (seems to cause race condition):

>	blender.exe!DEG::Node::~Node() Line 302	C++

 	blender.exe!DEG::OperationNode::~OperationNode() Line 205	C++
 	[Externí kód]	
 	blender.exe!OBJECT_GUARDED_DESTRUCTOR<DEG::OperationNode>(DEG::OperationNode * what) Line 265	C++
 	blender.exe!DEG::ComponentNode::clear_operations() Line 248	C++
 	blender.exe!DEG::ComponentNode::~ComponentNode() Line 122	C++
 	[Externí kód]	
 	blender.exe!OBJECT_GUARDED_DESTRUCTOR<DEG::ComponentNode>(DEG::ComponentNode * what) Line 265	C++
 	blender.exe!DEG::id_deps_node_hash_value_free(void * value_v) Line 98	C++
 	blender.exe!ghash_free_cb(GHash * gh, void(*)(void *) keyfreefp, void(*)(void *) valfreefp) Line 654	C
 	blender.exe!BLI_ghash_free(GHash * gh, void(*)(void *) keyfreefp, void(*)(void *) valfreefp) Line 1028	C
 	blender.exe!DEG::IDNode::destroy() Line 164	C++
 	blender.exe!DEG::IDNode::~IDNode() Line 152	C++
 	[Externí kód]	
 	blender.exe!OBJECT_GUARDED_DESTRUCTOR<DEG::IDNode>(DEG::IDNode * what) Line 265	C++
 	blender.exe!DEG::Depsgraph::clear_id_nodes() Line 170	C++
 	blender.exe!DEG::Depsgraph::clear_all_nodes() Line 242	C++
 	blender.exe!DEG::DepsgraphNodeBuilder::begin_build() Line 352	C++
 	blender.exe!DEG_graph_build_from_view_layer(Depsgraph * graph, Main * bmain, Scene * scene, ViewLayer * view_layer) Line 247	C++
 	blender.exe!DEG_graph_relations_update(Depsgraph * graph, Main * bmain, Scene * scene, ViewLayer * view_layer) Line 500	C++
 	blender.exe!scene_graph_update_tagged(Depsgraph * depsgraph, Main * bmain, bool only_if_tagged) Line 1352	C
 	blender.exe!BKE_scene_graph_update_tagged(Depsgraph * depsgraph, Main * bmain) Line 1396	C
 	blender.exe!wm_event_do_depsgraph(bContext * C, bool is_after_open_file) Line 360	C
 	blender.exe!wm_event_do_refresh_wm_and_depsgraph(bContext * C) Line 387	C
 	blender.exe!wm_event_do_notifiers(bContext * C) Line 553	C
 	blender.exe!WM_main(bContext * C) Line 424	C
 	blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 520	C

crash on frame 10, because only on 10th frame mesh is actually loaded crashed (thread): `id_node` was freed ``` > blender.exe!DEG_graph_tag_relations_update(Depsgraph * graph) Line 487 C++ blender.exe!DEG_relations_tag_update(Main * bmain) Line 508 C++ blender.exe!rna_Material_use_nodes_update(bContext * C, PointerRNA * ptr) Line 201 C blender.exe!rna_property_update(bContext * C, Main * bmain, Scene * scene, PointerRNA * ptr, PropertyRNA * prop) Line 2235 C blender.exe!RNA_property_update(bContext * C, PointerRNA * ptr, PropertyRNA * prop) Line 2304 C blender.exe!pyrna_py_to_prop(PointerRNA * ptr, PropertyRNA * prop, void * data, _object * value, const unsigned char * error_prefix) Line 2208 C blender.exe!pyrna_struct_setattro(BPy_StructRNA * self, _object * pyname, _object * value) Line 4521 C [Externí kód] blender.exe!bpy_class_call(bContext * C, PointerRNA * ptr, FunctionRNA * func, ParameterList * parms) Line 8325 C blender.exe!rna_operator_execute_cb(bContext * C, wmOperator * op) Line 1307 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 1279 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 1514 C blender.exe!WM_operator_call_py(bContext * C, wmOperatorType * ot, short context, PointerRNA * properties, ReportList * reports, const bool is_undo) Line 1614 C blender.exe!pyop_call(_object * UNUSED_self, _object * args) Line 268 C [Externí kód] blender.exe!bpy_app_generic_callback(Main * UNUSED_main, PointerRNA * * pointers, const int num_pointers, void * arg) Line 344 C blender.exe!BKE_callback_exec(Main * bmain, PointerRNA * * pointers, const int num_pointers, eCbEvent evt) Line 43 C blender.exe!BKE_callback_exec_id(Main * bmain, ID * id, eCbEvent evt) Line 59 C blender.exe!BKE_scene_graph_update_for_newframe(Depsgraph * depsgraph, Main * bmain) Line 1412 C blender.exe!engine_depsgraph_init(RenderEngine * engine, ViewLayer * view_layer) Line 525 C blender.exe!RE_engine_render(Render * re, int do_all) Line 770 C blender.exe!do_render_3d(Render * re) Line 1166 C blender.exe!do_render(Render * re) Line 1245 C blender.exe!do_render_composite(Render * re) Line 1464 C blender.exe!do_render_all_options(Render * re) Line 1729 C blender.exe!RE_RenderAnim(Render * re, Main * bmain, Scene * scene, ViewLayer * single_layer, Object * camera_override, int sfra, int efra, int tfra) Line 2689 C blender.exe!render_startjob(void * rjv, short * stop, short * do_update, float * progress) Line 668 C blender.exe!do_job_thread(void * job_v) Line 384 C blender.exe!tslot_thread_start(void * tslot_p) Line 261 C [Externí kód] ``` main (seems to cause race condition): ``` > blender.exe!DEG::Node::~Node() Line 302 C++ blender.exe!DEG::OperationNode::~OperationNode() Line 205 C++ [Externí kód] blender.exe!OBJECT_GUARDED_DESTRUCTOR<DEG::OperationNode>(DEG::OperationNode * what) Line 265 C++ blender.exe!DEG::ComponentNode::clear_operations() Line 248 C++ blender.exe!DEG::ComponentNode::~ComponentNode() Line 122 C++ [Externí kód] blender.exe!OBJECT_GUARDED_DESTRUCTOR<DEG::ComponentNode>(DEG::ComponentNode * what) Line 265 C++ blender.exe!DEG::id_deps_node_hash_value_free(void * value_v) Line 98 C++ blender.exe!ghash_free_cb(GHash * gh, void(*)(void *) keyfreefp, void(*)(void *) valfreefp) Line 654 C blender.exe!BLI_ghash_free(GHash * gh, void(*)(void *) keyfreefp, void(*)(void *) valfreefp) Line 1028 C blender.exe!DEG::IDNode::destroy() Line 164 C++ blender.exe!DEG::IDNode::~IDNode() Line 152 C++ [Externí kód] blender.exe!OBJECT_GUARDED_DESTRUCTOR<DEG::IDNode>(DEG::IDNode * what) Line 265 C++ blender.exe!DEG::Depsgraph::clear_id_nodes() Line 170 C++ blender.exe!DEG::Depsgraph::clear_all_nodes() Line 242 C++ blender.exe!DEG::DepsgraphNodeBuilder::begin_build() Line 352 C++ blender.exe!DEG_graph_build_from_view_layer(Depsgraph * graph, Main * bmain, Scene * scene, ViewLayer * view_layer) Line 247 C++ blender.exe!DEG_graph_relations_update(Depsgraph * graph, Main * bmain, Scene * scene, ViewLayer * view_layer) Line 500 C++ blender.exe!scene_graph_update_tagged(Depsgraph * depsgraph, Main * bmain, bool only_if_tagged) Line 1352 C blender.exe!BKE_scene_graph_update_tagged(Depsgraph * depsgraph, Main * bmain) Line 1396 C blender.exe!wm_event_do_depsgraph(bContext * C, bool is_after_open_file) Line 360 C blender.exe!wm_event_do_refresh_wm_and_depsgraph(bContext * C) Line 387 C blender.exe!wm_event_do_notifiers(bContext * C) Line 553 C blender.exe!WM_main(bContext * C) Line 424 C blender.exe!main(int argc, const unsigned char * * UNUSED_argv_c) Line 520 C ```

Richard Antalik commented

2020-02-26 19:17:44 +01:00

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

Evan Wilson commented

2020-02-26 21:09:03 +01:00

Closed as duplicate of blender/blender#73530

Evan Wilson closed this issue

2020-02-26 21:09:03 +01:00

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Blender crashes when I import an .OBJ file during a frame_change_pre callback while rendering an animation #74216