Fixed in POV-Ray v3.8.0 (currently under development). If you dare, try
the binaries available at:
https://github.com/POV-Ray/povray/releases/tag/v3.8.0-alpha.9387404
(Make sure to name them differently than the original v3.7 binaries. It
should also be possible to extract them to a different directory and run
them from there.)
