Particle system crashes #59258

New Issue

Wybren van Keulen · 2018-12-12T17:54:11+01:00

Wybren van Keulen commented

2018-12-12 17:54:11 +01:00

Since the last few days, there is a problem with particle systems that don't use physics. There are some lines printed to the terminal, and sometimes Blender crashes.

To reproduce this error:

Add a plane
Add a particle system to the plane.
Set Physics Type to either No or Keyed
Switch from Emitter to Hair and back.

Now you will see the following lines output to the terminal:

add_relation(Particle Point Cache) - Failed, but op_from (ComponentKey(OBPlane, PARTICLE_SYSTEM)) was ok
add_relation(Particle Point Cache) - Could not find op_to (ComponentKey(OBPlane, POINT_CACHE))

I get the same error when configuring particles through Python in The Grove. There it eventually also causes a crash. The above steps are the simplest way I could find to reproduce the bug, although it doesn't crash Blender.

I'm on OSX at the moment and will try tomorrow on a Windows 10 machine.

Since the last few days, there is a problem with particle systems that don't use physics. There are some lines printed to the terminal, and sometimes Blender crashes. To reproduce this error: - Add a plane - Add a particle system to the plane. - Set *Physics Type* to either *No* or *Keyed* - Switch from *Emitter* to *Hair* and back. Now you will see the following lines output to the terminal: ``` add_relation(Particle Point Cache) - Failed, but op_from (ComponentKey(OBPlane, PARTICLE_SYSTEM)) was ok add_relation(Particle Point Cache) - Could not find op_to (ComponentKey(OBPlane, POINT_CACHE)) ``` I get the same error when configuring particles through Python in The Grove. There it eventually also causes a crash. The above steps are the simplest way I could find to reproduce the bug, although it doesn't crash Blender. I'm on OSX at the moment and will try tomorrow on a Windows 10 machine.

Wybren van Keulen commented

2018-12-12 17:54:11 +01:00

Added subscriber: @WybrenvanKeulen

Wybren van Keulen commented

2018-12-14 13:53:55 +01:00

It actually got worse. I just made a fresh build on OSX and now particle instanced objects don't show up unless I check "Use modifier stack". This could be a different bug, but I suspect it may be related because I saw that with "make update", a file called "object_relations.c" was updated. And given the terminal message starts with "add_relation", this may be related.

In the meantime I tested on Windows 10 and same thing there.

It actually got worse. I just made a fresh build on OSX and now particle instanced objects don't show up unless I check "Use modifier stack". This could be a different bug, but I suspect it may be related because I saw that with "make update", a file called "object_relations.c" was updated. And given the terminal message starts with "add_relation", this may be related. In the meantime I tested on Windows 10 and same thing there.

Wybren van Keulen commented

2018-12-17 18:05:07 +01:00

A user of The Grove reported that this bug now sometimes causes crashes when opening a Blender file, making the file unusable. I can confirm this, and Blender crashes with a segmentation fault and the following crash.txt, which leads me to believe that it is a bug in the dependency graph.

# Blender 2.80 (sub 38), Commit date: 2018-12-17 16:11, Hash 144178bacf2

# backtrace
0   blender                             0x0000000107924077 BLI_system_backtrace + 55
1   blender                             0x0000000106daa01b sig_handle_crash + 363
2   libsystem_platform.dylib            0x00007fff59b3df5a _sigtramp + 26
3   libobjc.A.dylib                     0x00007fff58c0b087 _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 817
4   blender                             0x00000001075cc042 BKE_libblock_copy_ex + 194
5   blender                             0x00000001075cb201 BKE_id_copy_ex + 225
6   blender                             0x000000010793eba6 _ZN3DEG34deg_expand_copy_on_write_datablockEPKNS_9DepsgraphEPKNS_10IDDepsNodeEPNS_20DepsgraphNodeBuilderEb + 806
7   blender                             0x000000010793f865 _ZN3DEG34deg_update_copy_on_write_datablockEPKNS_9DepsgraphEPKNS_10IDDepsNodeE + 629
8   blender                             0x000000010793e7dc _ZN3DEGL17deg_task_run_funcEP8TaskPoolPvi + 140
9   blender                             0x0000000107925098 BLI_task_pool_work_and_wait + 664
10  blender                             0x00000001079252de BLI_task_pool_work_wait_and_reset + 14
11  blender                             0x000000010793e4fa _ZN3DEG23deg_evaluate_on_refreshEPNS_9DepsgraphE + 442
12  blender                             0x000000010767db4b BKE_scene_graph_update_tagged + 187
13  blender                             0x0000000106dae13c wm_event_do_depsgraph + 236
14  blender                             0x0000000106db710f wm_file_read_post + 111
15  blender                             0x0000000106db69d6 WM_file_read + 854
16  blender                             0x0000000106db92f6 wm_open_mainfile_exec + 422
17  blender                             0x0000000106db1b7a wm_handler_fileselect_do + 218
18  blender                             0x0000000106db5762 wm_handlers_do_intern + 1794
19  blender                             0x0000000106db13df wm_handlers_do + 31
20  blender                             0x0000000106db09c2 wm_event_do_handlers + 1474
21  blender                             0x0000000106daaa90 WM_main + 32
22  blender                             0x0000000106da69d9 main + 969
23  libdyld.dylib

A user of The Grove reported that this bug now sometimes causes crashes when opening a Blender file, making the file unusable. I can confirm this, and Blender crashes with a segmentation fault and the following crash.txt, which leads me to believe that it is a bug in the dependency graph. ``` # Blender 2.80 (sub 38), Commit date: 2018-12-17 16:11, Hash 144178bacf2 # backtrace 0 blender 0x0000000107924077 BLI_system_backtrace + 55 1 blender 0x0000000106daa01b sig_handle_crash + 363 2 libsystem_platform.dylib 0x00007fff59b3df5a _sigtramp + 26 3 libobjc.A.dylib 0x00007fff58c0b087 _ZN12_GLOBAL__N_119AutoreleasePoolPage3popEPv + 817 4 blender 0x00000001075cc042 BKE_libblock_copy_ex + 194 5 blender 0x00000001075cb201 BKE_id_copy_ex + 225 6 blender 0x000000010793eba6 _ZN3DEG34deg_expand_copy_on_write_datablockEPKNS_9DepsgraphEPKNS_10IDDepsNodeEPNS_20DepsgraphNodeBuilderEb + 806 7 blender 0x000000010793f865 _ZN3DEG34deg_update_copy_on_write_datablockEPKNS_9DepsgraphEPKNS_10IDDepsNodeE + 629 8 blender 0x000000010793e7dc _ZN3DEGL17deg_task_run_funcEP8TaskPoolPvi + 140 9 blender 0x0000000107925098 BLI_task_pool_work_and_wait + 664 10 blender 0x00000001079252de BLI_task_pool_work_wait_and_reset + 14 11 blender 0x000000010793e4fa _ZN3DEG23deg_evaluate_on_refreshEPNS_9DepsgraphE + 442 12 blender 0x000000010767db4b BKE_scene_graph_update_tagged + 187 13 blender 0x0000000106dae13c wm_event_do_depsgraph + 236 14 blender 0x0000000106db710f wm_file_read_post + 111 15 blender 0x0000000106db69d6 WM_file_read + 854 16 blender 0x0000000106db92f6 wm_open_mainfile_exec + 422 17 blender 0x0000000106db1b7a wm_handler_fileselect_do + 218 18 blender 0x0000000106db5762 wm_handlers_do_intern + 1794 19 blender 0x0000000106db13df wm_handlers_do + 31 20 blender 0x0000000106db09c2 wm_event_do_handlers + 1474 21 blender 0x0000000106daaa90 WM_main + 32 22 blender 0x0000000106da69d9 main + 969 23 libdyld.dylib ```

Sebastian Parborg commented

2018-12-19 15:01:24 +01:00

Added subscriber: @ZedDB

Sergey Sharybin was assigned by Sebastian Parborg

2018-12-19 15:01:24 +01:00

Sebastian Parborg commented

2018-12-19 15:01:24 +01:00

Guessing this might be depsgraph related too

Sergey Sharybin commented

2018-12-19 15:39:36 +01:00

The print about relation being unable to be added is harmless. Crash i could not reproduce.

However, i did some fixes in 4563849c1b. So please test with an upcoming version of Blender from buildbot. If that still crashes we do need a simple .blend file with exact steps reproducing the issue.

The print about relation being unable to be added is harmless. Crash i could not reproduce. However, i did some fixes in 4563849c1b. So please test with an upcoming version of Blender from buildbot. If that still crashes we do need a simple .blend file with exact steps reproducing the issue.

Philipp Oeser commented

2019-01-15 12:08:15 +01:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-01-15 12:08:15 +01:00

Changed status from 'Open' to: 'Archived'

Philipp Oeser closed this issue

2019-01-15 12:08:15 +01:00

Philipp Oeser commented

2019-01-15 12:08:15 +01:00

Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to archive the report until the requested information is given.

Wybren van Keulen commented

2019-01-16 15:44:55 +01:00

Changed status from 'Archived' to: 'Resolved'

Wybren van Keulen commented

2019-01-16 15:44:55 +01:00

This no longer happens in the latest builds, so I'm changing the status to resolved. Please excuse my late response and thanks for fixing it!

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Particle system crashes #59258