Bug 1326004

Description of problem:

Fedora22-supplied python3-msgpack dies on attempt to use on ppc64 box, as evidenced by borg (https://github.com/borgbackup/borg/),
recompiling msgpack with pip locally makes the problem go away for both 0.4.6 (same version as in Fedora) and 0.4.7 (latest version).

Version-Release number of selected component (if applicable):
Name        : python3-msgpack
Arch        : ppc64
Epoch       : 0
Version     : 0.4.6
Release     : 1.fc22

How reproducible:

100% reproducible.


Steps to Reproduce:
install python3-msgpack (dnf install python3-msgpack)
Install borg (pip3.4 install "borgbackup==1.0.1")
borg init somehost:/tmp/backup

Actual results:

this crashes 100% of time with "Illegal instruction (core dumped)"

 abrt backtrace head is like this:
{   "signal": 4
,   "executable": "/usr/bin/python3.4"
,   "stacktrace":
      [ {   "crash_thread": true
        ,   "frames":
              [ {   "address": 70366574793944
                ,   "build_id": "b25b960673a0f2d02a6e873c24af1a5be471bc46"
                ,   "build_id_offset": 54488
                ,   "function_name": "00000017.plt_call.PyBytes_AsString"
                ,   "file_name": "/usr/lib64/python3.4/site-packages/msgpack/_unpacker.cpython-34m.so"
                }
              , {   "address": 70366714197868
                ,   "build_id": "dbdd62cb43c5dce605c9b89e55227a8cf62666ee"
                ,   "build_id_offset": 1177452
                ,   "file_name": "/lib64/libpython3.4m.so.1.0"
                }
              , {   "address": 70366713679904
                ,   "build_id": "dbdd62cb43c5dce605c9b89e55227a8cf62666ee"
                ,   "build_id_offset": 659488
                ,   "function_name": "PyObject_Call"
                ,   "file_name": "/lib64/libpython3.4m.so.1.0"
                }


Expected results:

the repo should be initialized.

Additional info:
dnf remove python3-rpcmsg followed by
pip3.4 install msgpack-python # Ths will compile a local version.
makes the problem to go away, so I believe the issue is in how Fedora compiled this.