Adding Perspective LPE to purely horizontal or vertical path causes crash
When adding a Perspective LPE to a path, Inkscape crashes for me. This might be related to #1415
Steps to reproduce:
- open Inkscape and load ekman.svg
- click on any arrow (I tested with top two)
- go to Path -> Effects -> add effect -> perspective
Inkscape crashes with
gsl: lu.c:311: ERROR: matrix is singular Default GSL error handler invoked.
What should have happened?
Inkscape shouldn't crash.
- Inkscape Version: Inkscape 1.0.1 (3bc2e813f5, 2020-09-07, custom), Pango version: 1.48.0 - Operating System: Arch Linux - Operating System version: 5.10.9-arch1-1
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