Ah, okay, I missed a separate core dump from another process, a minute earlier, that I think reflects an actual aberrant condition:
rogram terminated with signal 11, Segmentation fault. #0 0x00000000005fb62b in timer_list_expire (t=1749420105, h=0x7fc1b7046af0, slow_l=0x7fc1b70478f8, slow_mark=32972) at timer.c:877 877 _timer_rm_list(tl); /* detach */ Missing separate debuginfos, use: debuginfo-install cyrus-sasl-lib-2.1.23-15.el6_6.1.x86_64 glibc-2.12-1.149.el6_6.5.x86_64 keyutils-libs-1.4-5.el6.x86_64 krb5-libs-1.10.3-33.el6.x86_64 libcom_err-1.41.12-21.el6.x86_64 libselinux-2.0.94-5.8.el6.x86_64 nspr-4.10.6-1.el6_5.x86_64 nss-3.16.2.3-3.el6_6.x86_64 nss-softokn-freebl-3.14.3-22.el6_6.x86_64 nss-util-3.16.2.3-2.el6_6.x86_64 openldap-2.4.39-8.el6.x86_64 openssl-1.0.1e-30.el6_6.5.x86_64 postgresql92-libs-9.2.10-1PGDG.rhel6.x86_64 zlib-1.2.3-29.el6.x86_64 (gdb) where #0 0x00000000005fb62b in timer_list_expire (t=1749420105, h=0x7fc1b7046af0, slow_l=0x7fc1b70478f8, slow_mark=32972) at timer.c:877 #1 0x00000000005fbae3 in timer_handler () at timer.c:953 #2 0x00000000005fbf51 in timer_main () at timer.c:992 #3 0x00000000004a64ba in main_loop () at main.c:1700 #4 0x00000000004ab8bf in main (argc=11, argv=0x7fff1dbcda68) at main.c:2578