Note that krb5 in utopic amd64 was compiled against gcc 4.9.0-10ubuntu2 (build log: https://launchpadlibrarian.net/179748030/buildlog_ubuntu-utopic-amd64.krb5_1.12.1%2Bdfsg-3ubuntu1_UPLOADING.txt.gz). So it looks like it might be wrong to believe that GCC 4.9 does not induce this problem.
Note that krb5 in utopic amd64 was compiled against gcc 4.9.0-10ubuntu2 (build log: https:/ /launchpadlibra rian.net/ 179748030/ buildlog_ ubuntu- utopic- amd64.krb5_ 1.12.1% 2Bdfsg- 3ubuntu1_ UPLOADING. txt.gz). So it looks like it might be wrong to believe that GCC 4.9 does not induce this problem.