[Python-modules-team] Bug#909529: python3-alembic and python3-astroid: file conflict on /usr/lib/python3/dist-packages/.pytest_cache/v/cache/nodeids

[Helmut Grohne]

Package: python3-alembic,python3-astroid
Severity: serious

When installing python3-alembic and python3-astroid in a fresh sid
chroot, this is what I get:

| ...
| Unpacking python3-sqlalchemy (1.2.8+ds1-1) ...
| Selecting previously unselected package python3-alembic.
| Preparing to unpack .../11-python3-alembic_1.0.0-1_all.deb ...
| Unpacking python3-alembic (1.0.0-1) ...
| Selecting previously unselected package python3-lazy-object-proxy.
| Preparing to unpack .../12-python3-lazy-object-proxy_1.3.1-1+b1_amd64.deb ...
| Unpacking python3-lazy-object-proxy (1.3.1-1+b1) ...
| Selecting previously unselected package python3-wrapt.
| Preparing to unpack .../13-python3-wrapt_1.10.11-1_amd64.deb ...
| Unpacking python3-wrapt (1.10.11-1) ...
| Selecting previously unselected package python3-setuptools.
| Preparing to unpack .../14-python3-setuptools_40.2.0-1_all.deb ...
| Unpacking python3-setuptools (40.2.0-1) ...
| Selecting previously unselected package python3-astroid.
| Preparing to unpack .../15-python3-astroid_2.0.4-1_all.deb ...
| Unpacking python3-astroid (2.0.4-1) ...
| dpkg: error processing archive /tmp/apt-dpkg-install-PRg25B/15-python3-astroid_2.0.4-1_all.deb (--unpack):
|  trying to overwrite '/usr/lib/python3/dist-packages/.pytest_cache/v/cache/nodeids', which is also in package python3-alembic 1.0.0-1
| dpkg-deb: error: paste subprocess was killed by signal (Broken pipe)
| Errors were encountered while processing:
|  /tmp/apt-dpkg-install-PRg25B/15-python3-astroid_2.0.4-1_all.deb
| E: Sub-process /usr/bin/dpkg returned an error code (1)

Helmut