Bug#949732: package ftbfs on some archs, and has missing dependencies

[Matthias Klose]

Package: src:mlpack
Version: 3.2.2-2
Severity: serious
Tags: sid bullseye

package ftbfs on some archs, and has missing dependencies:

missing build on i386
missing build on mipsel
uninstallable on arch amd64, autopkgtest delayed there
uninstallable on arch arm64, autopkgtest delayed there
Additional info:
python3-mlpack/amd64 unsatisfiable Depends: python3.7-mlpack
python3-mlpack/arm64 unsatisfiable Depends: python3.7-mlpack
python3-mlpack/armel unsatisfiable Depends: python3.7-mlpack
python3-mlpack/armhf unsatisfiable Depends: python3.7-mlpack
python3-mlpack/mips64el unsatisfiable Depends: python3.7-mlpack
python3-mlpack/ppc64el unsatisfiable Depends: python3.7-mlpack
python3-mlpack/s390x unsatisfiable Depends: python3.7-mlpack