NURBS solid fillet on cone cut fails

### System information

- **SolveSpace version:** `3.0~`https://github.com/solvespace/solvespace/commit/b399d9a1ec50086cdfc827a43d661ef79052e175
- **Operating system:** Debian 10 buster

### Expected behavior

There should not be fails in NURBS fillet on cone cut edge.

### Actual behavior

NURBS solid fails.

### Additional information

- [slvs3x-cone_fillet.zip](https://github.com/solvespace/solvespace/files/7982820/slvs3x-cone_fillet.zip)
![Screenshot_2022-02-02_02-45-09](https://user-images.githubusercontent.com/13188580/152075663-54bf2ada-c80c-4aef-9be0-67b4c63597ec.png)

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NURBS solid fillet on cone cut fails #1208

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NURBS solid fillet on cone cut fails #1208

Description

System information

Expected behavior

Actual behavior

Additional information

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

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