[issue27350] Compact and ordered dict

[STINNER Victor]

STINNER Victor added the comment:

For an unknown reason, the code fails on a few buildbots, but not all of them.

* PPC64 Fedora 3.x: GNU/Linux ppc64 POWER7 Fedora 20 GCC Compile Farm host gcc110.fsffrance.org
* PPC64LE Fedora 3.x: GNU/Linux ppc64le POWER8 Fedora 21 GCC Compile Farm host gcc112.fsffrance.org
* s390x Debian 3.x: GNU/Linux s390x System Z Debian Jessie
* s390x RHEL 3.x: GNU/Linux s390x System Z RHEL 7.1
* s390x SLES 3.x: GNU/Linux s390x System Z SLES 12

These buildbot slaves use non-Intel CPU: POWER7, POWER8, s390x System Z (I don't know this platform at all!).

gcc -pthread   -o Programs/_freeze_importlib Programs/_freeze_importlib.o (...) -lpthread -ldl  -lutil   -lm  
./Programs/_freeze_importlib \
    ./Lib/importlib/_bootstrap.py Python/importlib.h
_freeze_importlib: Objects/dictobject.c:805: lookdict_unicode_nodummy: Assertion `ep->me_key != ((void *)0)' failed.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue27350>
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