Crash when adding hook to curve with vertex parenting #69257

New Issue

Alex · 2019-08-28T18:23:54+02:00

Alex commented

2019-08-28 18:23:54 +02:00

System Information
Operating system: Windows-10-10.0.17763 64 Bits
Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.02

Blender Version
Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: f6cb5f5449

Short description of error
If you add object as hook to curve vertex when it's vertex parented to this object, you get a crash.

Exact steps for others to reproduce the error
Add curve. Add mesh. Select curve, then mesh, vertex parent curve to mesh.
Select mesh, than curve, select vertex of curve and add object as hook.

crash_curve.blend

**System Information** Operating system: Windows-10-10.0.17763 64 Bits Graphics card: GeForce GTX 1050 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 436.02 **Blender Version** Broken: version: 2.80 (sub 75), branch: master, commit date: 2019-07-29 14:47, hash: `f6cb5f5449` **Short description of error** If you add object as hook to curve vertex when it's vertex parented to this object, you get a crash. **Exact steps for others to reproduce the error** Add curve. Add mesh. Select curve, then mesh, vertex parent curve to mesh. Select mesh, than curve, select vertex of curve and add object as hook. [crash_curve.blend](https://archive.blender.org/developer/F7707945/crash_curve.blend) ![Безымянный.png](https://archive.blender.org/developer/F7707958/Безымянный.png)

Alex commented

2019-08-28 18:23:54 +02:00

Added subscriber: @Fluffyrescent

Abid Maqbool commented

2019-08-28 19:33:17 +02:00

Added subscriber: @AbidMaqbool

Abid Maqbool commented

2019-08-28 19:33:17 +02:00

In Blender 2.80 stable can confirm bug/error
Same Proposed Steps:

Add Curve Object (e.g. Bezier Curve)
Add Mesh Object (e.g. Cube)
Select Mesh then Curve (important step) (I think @Fluffyrescent forget this step)
Ctrl + P Parent -> Vertex
Enter Edit Mode & Select a vertex of Curve
Apply Ctrl + H Hooks -> Hook to Selected Object
Crash Blender

Further Checking...

In Blender 2.80 stable **can confirm bug/error** Same **Proposed** Steps: * Add **Curve** Object (e.g. Bezier Curve) * Add **Mesh** Object (e.g. Cube) * Select **Mesh** then **Curve** (important step) (I think @Fluffyrescent forget this step) * **Ctrl + P** `Parent` -> **Vertex** * Enter **Edit Mode** & Select **a vertex** of `Curve` * Apply **Ctrl + H** `Hooks` -> **Hook to Selected Object** **Crash Blender** **Further Checking...**

Abid Maqbool commented

2019-08-28 19:38:56 +02:00

Hum! Blender 2.81 (sub 3) 2019-08-28 03:44 f88022b96f seems fine for me!
I think, It's already resolved in latest blender version
@Fluffyrescent You can confirm in latest daily build! https://builder.blender.org/download/

Hum! Blender **2.81 (sub 3)** `2019-08-28 03:44` f88022b96f seems **fine for me**! I think, It's **already resolved** in latest blender version @Fluffyrescent You can confirm in latest daily build! https://builder.blender.org/download/

Philipp Oeser commented

2019-08-30 13:07:57 +02:00

Added subscriber: @lichtwerk

Philipp Oeser commented

2019-08-30 13:07:57 +02:00

Changed status from 'Open' to: 'Resolved'

Philipp Oeser closed this issue

2019-08-30 13:07:57 +02:00

Philipp Oeser self-assigned this 2019-08-30 13:07:57 +02:00

Philipp Oeser commented

2019-08-30 13:07:57 +02:00

It's a weird setup (in that it results in a dependency cycle):

Dependency cycle detected:
  OBBezierCurve/Geometry Component/GEOMETRY_EVAL() depends on
  OBCube/Transform Component/TRANSFORM_FINAL() via 'Hook Modifier'
  OBCube/Transform Component/TRANSFORM_SIMULATION_INIT() via 'Simulation -> Final Transform'
  OBCube/Transform Component/TRANSFORM_EVAL() via 'Transform Eval -> Simulation Init'
  OBCube/Transform Component/TRANSFORM_PARENT() via 'Eval'
  OBCube/Transform Component/TRANSFORM_LOCAL() via 'ObLocal -> ObParent'
  OBCube/Transform Component/TRANSFORM_INIT() via 'Transform Init'
  OBBezierCurve/Geometry Component/GEOMETRY_EVAL() via 'Vertex Parent'
Detected 1 dependency cycles

But can confirm the crash is resolved in master (assume this was fixed by blender/blender-staging@3566b81c8b, not sure though)

Anyways, lets close this, @Fluffyrescent: feel free to comment again / reopen if issues persist...

It's a weird setup (in that it results in a dependency cycle): ``` Dependency cycle detected: OBBezierCurve/Geometry Component/GEOMETRY_EVAL() depends on OBCube/Transform Component/TRANSFORM_FINAL() via 'Hook Modifier' OBCube/Transform Component/TRANSFORM_SIMULATION_INIT() via 'Simulation -> Final Transform' OBCube/Transform Component/TRANSFORM_EVAL() via 'Transform Eval -> Simulation Init' OBCube/Transform Component/TRANSFORM_PARENT() via 'Eval' OBCube/Transform Component/TRANSFORM_LOCAL() via 'ObLocal -> ObParent' OBCube/Transform Component/TRANSFORM_INIT() via 'Transform Init' OBBezierCurve/Geometry Component/GEOMETRY_EVAL() via 'Vertex Parent' Detected 1 dependency cycles ``` But can confirm the crash is resolved in master (assume this was fixed by blender/blender-staging@3566b81c8b, not sure though) Anyways, lets close this, @Fluffyrescent: feel free to comment again / reopen if issues persist...

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Crash when adding hook to curve with vertex parenting #69257