apache child pid exit signal Segmentation fault (11)

$ gcb /usr/sbin/httpd

  use: debuginfo-install httpd-2.4.6-90.el7.centos.x86_64

$ debuginfo-install httpd-2.4.6-90.el7.centos.x86_64
$ gcb /usr/sbin/httpd
(gdb) run -X
(gdb) list
(gdb) where

quit

# ulimit -a | grep 'core file size'
# ulimit -S -c unlimited

# ulimit -a | grep 'core file size'