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Geometry Nodes repeatable crash when setting position
Closed, ResolvedPublicBUG


System Information
Operating system: Windows-10-10.0.19042-SP0 64 Bits
Graphics card: NVIDIA GeForce GTX 1080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 497.09

Blender Version
Broken: version: 3.0.0, branch: master, commit date: 2021-12-02 18:35, hash: rBf1cca3055776

Short description of error
I'm getting a repeatable crash when trying to set position for debug purposes. I'm getting a vector out of a group node and try to use "Set Position" to visualize the vector in the viewport.
Unfortunately I wasn't able to simplify the group more, if I do that, after reloading blender it doesn't crash any more, even though the resulting set position still produces the wrong result.

Exact steps for others to reproduce the error

In the attached scene, please connect the Vector output of the Donut Field group node with the Position input of the "Set Position" node, and blender will crash.

Event Timeline

Hans Goudey (HooglyBoogly) changed the task status from Needs Triage to Confirmed.Dec 16 2021, 8:30 PM
Hans Goudey (HooglyBoogly) triaged this task as High priority.
Hans Goudey (HooglyBoogly) changed the subtype of this task from "Report" to "Bug".

Thanks for the report, I can confirm this.

The problem is that the Donut Field node group has two Group Output nodes. Only one is supported currently. It shouldn't crash though.