Hopefully fixed in devtoolset-6-gcc-6.1.1-5.el6
Tested using the related testcases against devtoolset-6-gcc-6.1.1-5.el6 and the issue seems to be gone. The other than x86_64 RHEL6 environments seem to pass with both -4.1 and -5. However, we will know more after we review the whole runs again. VERIFIED
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-2734.html