It seems to be some kind of incompatibility in swig. Upstream .cc files
are built with swig 3, debian has swig 4. If the package is built with
the upstream .cc files (ditching the associated lines in debian/rules)
it seems to work fine.
- Bug#1005044: python3-subnettree: package completely broken, ... Michael Stone
- Bug#1005044: python3-subnettree: package completely bro... Michael Stone