Blender 'randomly' crashes after a while #85304

New Issue

Simon Thommes · 2021-02-02T10:22:04+01:00

Simon Thommes commented

2021-02-02 10:22:04 +01:00

System Information
Operating system: Linux-5.8.0-7630-generic-x86_64-with-debian-bullseye-sid 64 Bits
Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.32.03

Blender Version
Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-02 08:36, hash: 356c62fe32
Worked: (newest version of Blender that worked as expected)

Short description of error
Random crashes in a specific file. Often on trying to move the viewport. My wild guess is that it's something with the dependency graph.

I ran it through a debug build and here is where it crashes:

- 1  ghash_lookup_entry (key=0x7fffffffd580, gh=0x0) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/BLI_ghash.c:427
- 2  BLI_ghash_lookup (gh=0x0, key=0x7fffffffd580) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/BLI_ghash.c:805
- 3  0x0000000003563711 in BKE_scene_get_depsgraph (scene=0x7fffbb0b2408, view_layer=0x7fff8ec76448) at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/scene.c:3462
- 4  0x0000000003ce849c in DRW_cache_free_old_batches (bmain=0x7fff950cee08) at /media/data/blender_guest/blender_master/source/blender/draw/intern/draw_manager.c:994
- 5  0x0000000004c21a5f in view3d_main_region_draw (C=0x7ffff470bee8, region=0x7fffba822e48) at /media/data/blender_guest/blender_master/source/blender/editors/space_view3d/view3d_draw.c:1626
- 6  0x00000000044e3a46 in ED_region_do_draw (C=0x7ffff470bee8, region=0x7fffba822e48) at /media/data/blender_guest/blender_master/source/blender/editors/screen/area.c:558
- 7  0x0000000003a0345b in wm_draw_window_offscreen (C=0x7ffff470bee8, win=0x7fffba973788, stereo=false) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:731
- 8  0x0000000003a03a1d in wm_draw_window (C=0x7ffff470bee8, win=0x7fffba973788) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:872
- 9  0x0000000003a04069 in wm_draw_update (C=0x7ffff470bee8) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:1073
- 10 0x0000000003a00694 in WM_main (C=0x7ffff470bee8) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm.c:643
# 11 0x00000000033eb805 in main (argc=1, argv=0x7fffffffe568) at /media/data/blender_guest/blender_master/source/creator/creator.c:522```

[fire_test_1.blend](https://archive.blender.org/developer/F9608825/fire_test_1.blend)

**Exact steps for others to reproduce the error**
Don't know how to reproduce from scratch.
With the file:
Also no reliable trigger, but usually for me it crashes after about half a minute of doing anything.

**System Information** Operating system: Linux-5.8.0-7630-generic-x86_64-with-debian-bullseye-sid 64 Bits Graphics card: Quadro RTX 6000/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.32.03 **Blender Version** Broken: version: 2.93.0 Alpha, branch: master, commit date: 2021-02-02 08:36, hash: `356c62fe32` Worked: (newest version of Blender that worked as expected) **Short description of error** Random crashes in a specific file. Often on trying to move the viewport. My wild guess is that it's something with the dependency graph. I ran it through a debug build and here is where it crashes: ```#0 0x000000000e36a1f6 in ghash_keyhash (key=0x7fffffffd580, gh=0x0) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/BLI_ghash.c:148 - 1 ghash_lookup_entry (key=0x7fffffffd580, gh=0x0) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/BLI_ghash.c:427 - 2 BLI_ghash_lookup (gh=0x0, key=0x7fffffffd580) at /media/data/blender_guest/blender_master/source/blender/blenlib/intern/BLI_ghash.c:805 - 3 0x0000000003563711 in BKE_scene_get_depsgraph (scene=0x7fffbb0b2408, view_layer=0x7fff8ec76448) at /media/data/blender_guest/blender_master/source/blender/blenkernel/intern/scene.c:3462 - 4 0x0000000003ce849c in DRW_cache_free_old_batches (bmain=0x7fff950cee08) at /media/data/blender_guest/blender_master/source/blender/draw/intern/draw_manager.c:994 - 5 0x0000000004c21a5f in view3d_main_region_draw (C=0x7ffff470bee8, region=0x7fffba822e48) at /media/data/blender_guest/blender_master/source/blender/editors/space_view3d/view3d_draw.c:1626 - 6 0x00000000044e3a46 in ED_region_do_draw (C=0x7ffff470bee8, region=0x7fffba822e48) at /media/data/blender_guest/blender_master/source/blender/editors/screen/area.c:558 - 7 0x0000000003a0345b in wm_draw_window_offscreen (C=0x7ffff470bee8, win=0x7fffba973788, stereo=false) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:731 - 8 0x0000000003a03a1d in wm_draw_window (C=0x7ffff470bee8, win=0x7fffba973788) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:872 - 9 0x0000000003a04069 in wm_draw_update (C=0x7ffff470bee8) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm_draw.c:1073 - 10 0x0000000003a00694 in WM_main (C=0x7ffff470bee8) at /media/data/blender_guest/blender_master/source/blender/windowmanager/intern/wm.c:643 # 11 0x00000000033eb805 in main (argc=1, argv=0x7fffffffe568) at /media/data/blender_guest/blender_master/source/creator/creator.c:522``` [fire_test_1.blend](https://archive.blender.org/developer/F9608825/fire_test_1.blend) **Exact steps for others to reproduce the error** Don't know how to reproduce from scratch. With the file: Also no reliable trigger, but usually for me it crashes after about half a minute of doing anything.

Simon Thommes commented

2021-02-02 10:22:04 +01:00

Added subscriber: @SimonThommes

Robert Guetzkow commented

2021-02-02 10:42:35 +01:00

Closed as duplicate of #85291

Robert Guetzkow closed this issue

2021-02-02 10:42:35 +01:00

Falk David commented

2021-02-02 10:43:40 +01:00

Added subscribers: @Sergey, @filedescriptor

Falk David commented

2021-02-02 10:43:40 +01:00

Looking at the code and the trace it seems as though scene->depsgraph_hash was null. The function BKE_scene_get_depsgraph makes sure that the scene has a view layer but just assumes that the depsgraph_hash exists. That is just stating the obvious though. The question is why that pointer was null.

There is a comment that suggests that this can be the case:

/* In some cases, e.g. when undo has to perform multiple steps at once, no depsgraph will be built so this pointer may be NULL. */

So the solution may be as simple as checking that scene->depsgraph_hash is not null or calling BKE_scene_ensure_depsgraph_hash. @Sergey any ideas?

Looking at the code and the trace it seems as though `scene->depsgraph_hash` was `null`. The function `BKE_scene_get_depsgraph` makes sure that the scene has a view layer but just assumes that the `depsgraph_hash` exists. That is just stating the obvious though. The question is why that pointer was `null`. There is a comment that suggests that this can be the case: ``` /* In some cases, e.g. when undo has to perform multiple steps at once, no depsgraph will be built so this pointer may be NULL. */ ``` So the solution may be as simple as checking that `scene->depsgraph_hash` is not null or calling `BKE_scene_ensure_depsgraph_hash`. @Sergey any ideas?

Robert Guetzkow commented

2021-02-02 10:47:41 +01:00

Added subscriber: @rjg

Robert Guetzkow commented

2021-02-02 10:47:41 +01:00

@filedescriptor That does seem to be the case, see the ticket I've merged this one into. You might want to post your comment there as well.

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Blender 'randomly' crashes after a while #85304