Segfault when playing baked particle + explode simulation #52832

New Issue

Bastien · 2017-09-19T17:02:38+02:00

Bastien commented

2017-09-19 17:02:38 +02:00

System Information
Linux amd64 (Debian Sid), Intel graphics (same bug with optirun, NVidia GM107M [GeForce GTX 960M])

Blender Version
Broken: 2.79 hash 36f5972ed0 (current latest version from builder.blender.org).
Also affected is the version shipped with Debian (2.78c).

Short description of error
I created a particle system from a mesh and added an explode modifier. I then duplicated it with alt-d (link) a few times and baked the simulation. While the simulation before baking looked fine, when I replaid it only one particle system would show, instead of one for each mesh. I unlinked the particle settings (by clicking on the number in the particles tab) for each mesh and baked again. The simulation again looked alright before baking. But now when I replay it, blender crashes after frame 5.

The scene also includes three force fields (force, vortex, turbulence)

Exact steps for others to reproduce the error
Open the attached file and try to play it (alt-a or the play button).

condensation.blend

I'm going to do a few tests to see what influences this behavior, but I wanted to upload the file as it is now before that.

Crash log

condensation.crash.txt

**System Information** Linux amd64 (Debian Sid), Intel graphics (same bug with optirun, NVidia GM107M [GeForce GTX 960M]) **Blender Version** Broken: 2.79 hash 36f5972ed01 (current latest version from builder.blender.org). Also affected is the version shipped with Debian (2.78c). **Short description of error** I created a particle system from a mesh and added an explode modifier. I then duplicated it with alt-d (link) a few times and baked the simulation. While the simulation before baking looked fine, when I replaid it only one particle system would show, instead of one for each mesh. I unlinked the particle settings (by clicking on the number in the particles tab) for each mesh and baked again. The simulation again looked alright before baking. But now when I replay it, blender crashes after frame 5. The scene also includes three force fields (force, vortex, turbulence) **Exact steps for others to reproduce the error** Open the attached file and try to play it (alt-a or the play button). [condensation.blend](https://archive.blender.org/developer/F825123/condensation.blend) I'm going to do a few tests to see what influences this behavior, but I wanted to upload the file as it is now before that. **Crash log** [condensation.crash.txt](https://archive.blender.org/developer/F825134/condensation.crash.txt)

Bastien commented

2017-09-19 17:02:38 +02:00

Changed status to: 'Open'

Bastien commented

2017-09-19 17:02:38 +02:00

Added subscriber: @Pik-1

Bastien commented

2017-09-19 17:14:06 +02:00

The result of my tests so far:

If I free all bakes and invalidate the cache, the simulation runs ok at first. Replaying it makes it crash.
Disabling the disk cache makes it crash.condensation.disable-disk-cache.crash.txt
If I free all bakes, invalidate the cache, and run the simulation again, it doesn't crash. I still have the bug where I can't see all particle systems though. Strangely enough, this time I see two of them, the active one and another that "jumps" between meshes. Here's a video.jumping-particles.mkv

The result of my tests so far: * If I free all bakes and invalidate the cache, the simulation runs ok at first. Replaying it makes it crash. * Disabling the disk cache makes it crash.[condensation.disable-disk-cache.crash.txt](https://archive.blender.org/developer/F825137/condensation.disable-disk-cache.crash.txt) * If I free all bakes, invalidate the cache, and run the simulation again, it doesn't crash. I still have the bug where I can't see all particle systems though. Strangely enough, this time I see two of them, the active one and another that "jumps" between meshes. Here's a video.[jumping-particles.mkv](https://archive.blender.org/developer/F825170/jumping-particles.mkv)

Bastien commented

2017-09-21 13:57:11 +02:00

Disabling the disk cache (after invalidating it) for all objects solves both problems.

Ray molenkamp commented

2017-09-28 16:30:00 +02:00

Added subscriber: @LazyDodo

Ray molenkamp commented

2017-09-28 16:30:00 +02:00

Changed status from 'Open' to: 'Archived'

Ray molenkamp closed this issue

2017-09-28 16:30:00 +02:00

Ray molenkamp self-assigned this 2017-09-28 16:30:00 +02:00

Ray molenkamp commented

2017-09-28 16:30:00 +02:00

I can't seem to be repro at all, given you solved the issue your self i'm gonna close the ticket, if you ever come up with a fool proof set of steps to trigger the issue we'd happily take a look at it though.

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Segfault when playing baked particle + explode simulation #52832