Assert when moving object parented to curve vertex #57583

New Issue

Dalai Felinto · 2018-11-02T16:06:30+01:00

Dalai Felinto commented

2018-11-02 16:06:30 +01:00

Blender Version
Broken: f2873b3ce5 (blender2.8 HEAD)
Worked: 2.79

Short description of error
Assert when moving object parented to a curve vertex.

Exact steps for others to reproduce the error

Add an empty and a curve
With the empty selected, select the curve, go to edit mode and create vertex parent (Ctrl+P)
Go to object mode
Or open simple file:
curve_vertex_parent.blend

Now Move the empty:

BLI_assert failed: //source/blender/blenkernel/intern/object.c:2129, give_parvert(), at 'par->runtime.curve_cache != ((void *)0)'

Full backtrace: P816

**Blender Version** Broken: f2873b3ce540 (blender2.8 HEAD) Worked: 2.79 **Short description of error** Assert when moving object parented to a curve vertex. **Exact steps for others to reproduce the error** * Add an empty and a curve * With the empty selected, select the curve, go to edit mode and create vertex parent (Ctrl+P) * Go to object mode *Or open simple file:* [curve_vertex_parent.blend](https://archive.blender.org/developer/F5337776/curve_vertex_parent.blend) Now Move the empty: `BLI_assert failed: //source/blender/blenkernel/intern/object.c:2129, give_parvert(), at 'par->runtime.curve_cache != ((void *)0)'` Full backtrace: [P816](https://archive.blender.org/developer/P816.txt)

Dalai Felinto commented

2018-11-02 16:06:30 +01:00

Added subscriber: @dfelinto

Sergey Sharybin was assigned by Dalai Felinto

2018-11-02 16:07:24 +01:00

Dalai Felinto commented

2018-11-02 16:07:24 +01:00

Added subscriber: @Sergey

Dalai Felinto commented

2018-11-02 16:07:24 +01:00

@Sergey want to tackle this one? It is probably some deg relation missing.

Sergey Sharybin commented

2018-11-16 10:46:57 +01:00

Added subscriber: @brecht

Sergey Sharybin commented

2018-11-16 10:46:57 +01:00

This is nothing to do with the relations, it is to do with the copies and access to evaluated/original data (internal project codename "COW FIASCO" :)

Here is a patch which fixes the issue, but we might want to reconsider something on a global scale, to make sure things like studio/blender-studio#55494 also work.

Wouldn't mind discussing it with @brecht here.

#57583.patch

This is nothing to do with the relations, it is to do with the copies and access to evaluated/original data (internal project codename "COW FIASCO" :) Here is a patch which fixes the issue, but we might want to reconsider something on a global scale, to make sure things like studio/blender-studio#55494 also work. Wouldn't mind discussing it with @brecht here. [#57583.patch](https://archive.blender.org/developer/F5582842/T57583.patch)

Sergey Sharybin commented

2019-02-19 15:41:49 +01:00

The proposed patch is not correct, the parent solving is used from dependency graph evaluation as well (and not only for the transformation tools and such). Testing alternative solution now.

blender-admin commented

2019-02-19 15:53:10 +01:00

This issue was referenced by 13f28798de

This issue was referenced by 13f28798de5d501ed8867bbc0d7a25ca6f1dbe9b

Sergey Sharybin commented

2019-02-19 15:56:14 +01:00

Changed status from 'Open' to: 'Resolved'

Sergey Sharybin closed this issue

2019-02-19 15:56:14 +01:00

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Reference: blender/blender#57583

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Assert when moving object parented to curve vertex #57583