Alembic export with multiple hair systems crash blender #49249

New Issue

Miika Puustinen (miikap) · 2016-09-04T17:27:39+02:00

2016-09-04 17:27:39 +02:00

System Information
Windows 10 2x GTX960

Blender Version
Broken: 2.78RC1, 0e5089c

Short description of error
If you export an alembic file from blender with multiple hair systems, it crashes Blender when that alembic is imported. It crashes also other software (tested with Houdini 15.5 NC)

Exact steps for others to reproduce the error

Select the default cube
Create a 2x particle system, change type to hair
Export to alembic

**System Information** Windows 10 2x GTX960 **Blender Version** Broken: 2.78RC1, 0e5089c **Short description of error** If you export an alembic file from blender with multiple hair systems, it crashes Blender when that alembic is imported. It crashes also other software (tested with Houdini 15.5 NC) **Exact steps for others to reproduce the error** 1. Select the default cube 2. Create a 2x particle system, change type to hair 3. Export to alembic

Miika Puustinen (miikap) commented

2016-09-04 17:27:39 +02:00

Changed status to: 'Open'

Miika Puustinen (miikap) commented

2016-09-04 17:27:39 +02:00

Added subscriber: @MiikaPuustinen

Kévin Dietrich commented

2016-09-04 17:35:18 +02:00

Added subscriber: @kevindietrich

Kévin Dietrich self-assigned this 2016-09-04 17:35:18 +02:00

Kévin Dietrich commented

2016-09-04 17:35:18 +02:00

I can't reproduce the crash, but I can see there is an issue doubled with a memory leak. Will check on it later.

blender-admin commented

2016-09-05 03:32:36 +02:00

This issue was referenced by 2024cd09a0

This issue was referenced by 2024cd09a09afdaac63ca060dc1e0b33eb75fbdc

Kévin Dietrich commented

2016-09-05 03:51:43 +02:00

Changed status from 'Open' to: 'Resolved'

Kévin Dietrich closed this issue

2016-09-05 03:51:43 +02:00

Sybren A. Stüvel commented

2017-02-07 19:21:39 +01:00

Added subscriber: @dr.sybren

Sybren A. Stüvel commented

2017-02-07 19:21:39 +01:00

Changed status from 'Resolved' to: 'Open'

Sybren A. Stüvel reopened this issue

2017-02-07 19:21:39 +01:00

Kévin Dietrich was unassigned by Sybren A. Stüvel

2017-02-07 19:21:39 +01:00

Sybren A. Stüvel self-assigned this 2017-02-07 19:21:39 +01:00

Sybren A. Stüvel commented

2017-02-07 19:21:39 +01:00

Commit 2024cd09a0 seems to have introduced a crash. I tried exporting Rinky , and it fails. A "git bisect" showed that 2024cd09 was responsible. I'll try and investigate & fix this.

...
read blend: /home/sybren/workspace/blender-git/blender/Rinky.blend
/home/sybren/workspace/blender-git/blender/blender-debug(BLI_system_backtrace+0x35) [0x55b463910472]
/home/sybren/workspace/blender-git/blender/blender-debug(CustomData_from_bmeshpoly+0x46) [0x55b463421a79]
/home/sybren/workspace/blender-git/blender/blender-debug(DM_update_tessface_data+0xea) [0x55b463397461]
/home/sybren/workspace/blender-git/blender/blender-debug(_ZN13AbcHairWriter8do_writeEv+0xc8) [0x55b4639d2800]
/home/sybren/workspace/blender-git/blender/blender-debug(_ZN15AbcObjectWriter5writeEv+0x23) [0x55b4639fd407]
/home/sybren/workspace/blender-git/blender/blender-debug(_ZN11AbcExporterclEP4MainRfRb+0x84a) [0x55b4639cb758]
/home/sybren/workspace/blender-git/blender/blender-debug(+0x2bd7250) [0x55b46398f250]
/home/sybren/workspace/blender-git/blender/blender-debug(+0x1a9118f) [0x55b46284918f]
/home/sybren/workspace/blender-git/blender/blender-debug(+0x2b5a61a) [0x55b46391261a]
/lib/x86_64-linux-gnu/libpthread.so.0(+0x76ca) [0x7f80c2fa46ca]
/lib/x86_64-linux-gnu/libc.so.6(clone+0x5f) [0x7f80c01ef0af]
BLI_assert failed: /home/sybren/workspace/blender-git/blender/source/blender/blenkernel/intern/customdata.c:2543, CustomData_from_bmeshpoly(), at '!CustomData_from_bmeshpoly_test(fdata, pdata, ldata, 0)'
zsh: abort      blender-debug Rinky.blend

Commit 2024cd09a09afdaac63ca060dc1e0b33eb75fbdc seems to have introduced a crash. I tried exporting [Rinky](https://cloud.blender.org/p/characters/57711c61c379cf02d1a87855) , and it fails. A "git bisect" showed that 2024cd09 was responsible. I'll try and investigate & fix this. ``` ... read blend: /home/sybren/workspace/blender-git/blender/Rinky.blend /home/sybren/workspace/blender-git/blender/blender-debug(BLI_system_backtrace+0x35) [0x55b463910472] /home/sybren/workspace/blender-git/blender/blender-debug(CustomData_from_bmeshpoly+0x46) [0x55b463421a79] /home/sybren/workspace/blender-git/blender/blender-debug(DM_update_tessface_data+0xea) [0x55b463397461] /home/sybren/workspace/blender-git/blender/blender-debug(_ZN13AbcHairWriter8do_writeEv+0xc8) [0x55b4639d2800] /home/sybren/workspace/blender-git/blender/blender-debug(_ZN15AbcObjectWriter5writeEv+0x23) [0x55b4639fd407] /home/sybren/workspace/blender-git/blender/blender-debug(_ZN11AbcExporterclEP4MainRfRb+0x84a) [0x55b4639cb758] /home/sybren/workspace/blender-git/blender/blender-debug(+0x2bd7250) [0x55b46398f250] /home/sybren/workspace/blender-git/blender/blender-debug(+0x1a9118f) [0x55b46284918f] /home/sybren/workspace/blender-git/blender/blender-debug(+0x2b5a61a) [0x55b46391261a] /lib/x86_64-linux-gnu/libpthread.so.0(+0x76ca) [0x7f80c2fa46ca] /lib/x86_64-linux-gnu/libc.so.6(clone+0x5f) [0x7f80c01ef0af] BLI_assert failed: /home/sybren/workspace/blender-git/blender/source/blender/blenkernel/intern/customdata.c:2543, CustomData_from_bmeshpoly(), at '!CustomData_from_bmeshpoly_test(fdata, pdata, ldata, 0)' zsh: abort blender-debug Rinky.blend ```

Sybren A. Stüvel commented

2017-02-07 19:59:03 +01:00

Ok, that commit isn't the root cause of the crash. Before that commit multiple particle systems would not even be written to the Alembic file due to them using the same name; after the commit they are written, which is crashing for some reason. More investigation tomorrow.

blender-admin commented

2017-02-08 11:47:16 +01:00

This issue was referenced by 8cda364d6f

This issue was referenced by 8cda364d6f2e6e8da454034f19fb959739045813

Sybren A. Stüvel commented

2017-02-08 12:52:21 +01:00

Changed status from 'Open' to: 'Resolved'

Sybren A. Stüvel closed this issue

2017-02-08 12:52:21 +01:00

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Alembic export with multiple hair systems crash blender #49249