(I had never heard of this package before your d-d post: I'm looking at
it because of the number of to-be-autoremoved reverse dependencies)
I can't reproduce any of these test failures: dpkg-buildpackage -us -uc
-A in a sid/amd64 cowbuilder --login chroot (build-deps + ccache
eatmydata lintian fakeroot) works for me.
This raises the obvious question of what is different: single vs
multiple CPU core (this submitter has reported several other
single-CPU-only FTBFSs [0])? Network (allowed in cowbuilder, blocked on
buildds)?
----
If we can't actually fix these bugs, there is a potential way to limit
the consequences: the only (build-)dependency chain is execnet <-
pytest-xdist <- wand <- (33 more), and wand appears to use pytest-xdist
only for its tests [1], which are already disabled for other reasons [2].
Hence, it may well be possible for wand to drop this build-dependency
(though I haven't actually tried this).
[0] https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=844264#65
[1] http://sources.debian.net/src/wand/0.4.4-1/setup.py/?hl=50#L50
[2] http://sources.debian.net/src/wand/0.4.4-1/debian/rules/#L24
