Bug#758488: python3: float conversion broken on s390x

[Philipp Kern <pkern@debian.org>]

Package: python3-minimal
Version: 3.4.1-1
Severity: serious
X-Debbugs-Cc: debian-s390@lists.debian.org

The datetime module fails its initialization assertions on s390x with 
python3 upon import:

> > > import datetime
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python3.4/datetime.py", line 619, in <module>
    microseconds=999999)
  File "/usr/lib/python3.4/datetime.py", line 395, in __new__
    assert abs(microseconds) < 3.1e6
AssertionError

(Disregard slight shifts in the line numbers.)

The actual problem is this:

> > > float(999999)
1073740750258176.0

Sadly python3-minimal fails to configure because of this, which in turn 
lets other packages being upgraded fail to fully install.

int to float casts are working with python2, but are completely broken 
with python3:

> > > float(1)
1073741824.0
> > > float(-1)
-1073741824.0

Kind regards
Philipp Kern