Description of problem:
Test ./tests/features/ipc.t is fails on executing ./tests/features/ipctest.py
Script received signal SIGSEGV, Segmentation Error (Core Dumb) in __GLFS_ENTRY_VALIDATE_FS (fs, invalid_fs); at glfs.c:


Version-Release number of selected component (if applicable):
3.10.7

How reproducible:
Build and install glusterfs on System Z (s390x) 
run ./tests/features/ipc.t testcase


Steps to Reproduce:
1. git clone https://github.com/gluster/glusterfs && cd glusterfs
2. git checkout v3.10.7
3. ./autogen.sh
4. ./configure
5. make
6. make install
7. ./run-tests.sh ./tests/features/ipc.t



Actual results:

ok
All tests successful.
Files=1, Tests=78, 45 wallclock secs ( 0.14 usr  0.03 sys +  9.27 cusr  4.64 csys = 14.08 CPU)
Result: PASS



Expected results:

Failed 1/6 subtests

Test Summary Report
-------------------
./tests/features/ipc.t (Wstat: 0 Tests: 6 Failed: 1)
  Failed test:  6
Files=1, Tests=6,  3 wallclock secs ( 0.03 usr  0.00 sys +  0.50 cusr  0.34 csys =  0.87 CPU)
Result: FAIL
./tests/features/ipc.t: bad status 1

       *********************************
       *       REGRESSION FAILED       *
       * Retrying failed tests in case *
       * we got some spurous failures  *
       *********************************



Additional info:
Thread 1 "python" received signal SIGSEGV, Segmentation fault.
0x000003fffd89c8e4 in pub_glfs_set_volfile_server (fs=0x33f110, transport=0x3fffdc2466c "tcp", host=0x3fffdc126e4 "73da538ef028", port=<optimized out>) at glfs.c:425
425             __GLFS_ENTRY_VALIDATE_FS (fs, invalid_fs);