Bug#1015912: mpi4py FTBFS on IPV6-only buildds

[Adrian Bunk]

Source: mpi4py
Version: 3.1.3-2
Severity: serious
Tags: ftbfs

https://buildd.debian.org/status/fetch.php?pkg=mpi4py&arch=amd64&ver=3.1.3-2%2Bb1&stamp=1658589239&raw=0

...
======================================================================
ERROR: testJoin (test_dynproc.TestDPM)
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Traceback (most recent call last):
  File "/<<PKGBUILDDIR>>/test/test_dynproc.py", line 175, in testJoin
    server.bind((host, 0))
socket.gaierror: [Errno -5] No address associated with hostname

----------------------------------------------------------------------
Ran 547 tests in 17.493s

FAILED (errors=1, skipped=10)
--------------------------------------------------------------------------
MPI_ABORT was invoked on rank 0 in communicator MPI_COMM_WORLD
with errorcode 1.

NOTE: invoking MPI_ABORT causes Open MPI to kill all MPI processes.
You may or may not see output from other processes, depending on
exactly when Open MPI kills them.
--------------------------------------------------------------------------
make[1]: *** [debian/rules:91: override_dh_auto_test] Error 1