Can everybody help me to find a problem?
Sorry for my English.

Reboot everynight when run freebsd statistic generate.
Only on i386 platforms.

Problem very strange.
Maybe it's NOT a problem BOINC client.

If everyday reboot these computer's or just stop program (/usr/local/etc/rc.d/boinc-client stop) kernel panic is not happened.

On amd64 problem is not persist.
On other i386 computer witch 2Gb memory problem is persist too.

boinc-client-7.2.33_6 installed from ports.

These i386 computers visible on statistic site:
https://setiathome.berkeley.edu/show_user.php?userid=9680271
https://setiathome.berkeley.edu/results.php?hostid=8251298
https://setiathome.berkeley.edu/results.php?hostid=8251101

Now uname -a

FreeBSD gw1 10.3-RELEASE FreeBSD 10.3-RELEASE #1: Mon Jul  3 12:23:43 MSK 2017     demis@gw1:/usr/obj/usr/src/sys/GW1  i386

Custom for "debug options" only, this perhaps on generic too.

CPU: Intel(R) Pentium(R) D CPU 2.80GHz (2810.00-MHz 686-class CPU)
Origin="GenuineIntel"  Id=0xf44  Family=0xf  Model=0x4  Stepping=4
Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
Features2=0x641d<SSE3,DTES64,MON,DS_CPL,CNXT-ID,CX16,xTPR>
AMD Features=0x20100000<NX,LM>

real memory  = 536870912 (512 MB)
avail memory = 497954816 (474 MB)

kernel: WARNING: / was not properly dismounted
WARNING: /: mount pending error: blocks 16 files 1

cat /var/log/messages | grep "panic"

Jul  1 03:04:00 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jul  1 03:04:00 gw1 kernel: #1 0xc0b3c1db at vpanic+0x11b
Jul  1 03:04:00 gw1 kernel: #2 0xc0b3c0bb at panic+0x1b
Jul  1 03:04:01 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jul  2 03:03:38 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jul  7 03:03:48 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jul  7 03:03:48 gw1 kernel: #1 0xc0b2ae7b at vpanic+0x11b
Jul  7 03:03:48 gw1 kernel: #2 0xc0b2aedb at panic+0x1b
Jul  7 03:03:49 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jul  8 04:17:38 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jul  9 03:04:30 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jul  9 03:04:30 gw1 kernel: #1 0xc0b2ae7b at vpanic+0x11b
Jul  9 03:04:30 gw1 kernel: #2 0xc0b2aedb at panic+0x1b
Jul  9 03:04:31 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jul 10 03:04:31 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jul 10 03:04:31 gw1 kernel: #1 0xc0b2ae7b at vpanic+0x11b
Jul 10 03:04:31 gw1 kernel: #2 0xc0b2aedb at panic+0x1b
Jul 10 03:04:33 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps

bzcat /var/log/messages.2.bz2 | grep "panic"

Apr 29 03:03:02 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps

bzcat /var/log/messages.0.bz2 | grep "panic"

Jun  3 04:16:51 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jun  3 04:16:51 gw1 kernel: #1 0xc0b3c1db at vpanic+0x11b
Jun  3 04:16:51 gw1 kernel: #2 0xc0b3c0bb at panic+0x1b
Jun  3 04:16:53 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun  4 03:04:06 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jun  4 03:04:06 gw1 kernel: #1 0xc0b3c1db at vpanic+0x11b
Jun  4 03:04:06 gw1 kernel: #2 0xc0b3c0bb at panic+0x1b
Jun  4 03:04:08 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun  6 03:04:04 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun 18 03:03:00 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun 19 03:04:08 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun 20 03:04:08 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun 24 03:03:51 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jun 24 03:03:51 gw1 kernel: #1 0xc0b3c1db at vpanic+0x11b
Jun 24 03:03:51 gw1 kernel: #2 0xc0b3c0bb at panic+0x1b
Jun 24 03:03:53 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps
Jun 25 03:04:03 gw1 kernel: panic: softdep_deallocate_dependencies: dangling deps
Jun 25 03:04:03 gw1 kernel: #1 0xc0b3c1db at vpanic+0x11b
Jun 25 03:04:03 gw1 kernel: #2 0xc0b3c0bb at panic+0x1b
Jun 25 03:04:04 gw1 savecore: reboot after panic: softdep_deallocate_dependencies: dangling deps

More info.
This include correct reboot too.
bzcat /var/log/messages.2.bz2 | grep "/boot/kernel/kernel"

Apr  8 22:21:42 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  8 23:34:03 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  8 23:37:55 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  8 23:44:16 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  9 00:44:46 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  9 00:54:42 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  9 00:59:07 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  9 01:11:22 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr  9 22:13:10 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Apr 29 03:03:01 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- FIRST reboot (kernel panic)

bzcat /var/log/messages.1.bz2 | grep "/boot/kernel/kernel"

May  8 03:02:11 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May  9 03:03:29 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 10 12:31:47 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 03:05:24 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 12 03:07:03 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 03:08:40 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 03:10:16 gw1 syslogd: kernel boot file is /boot/kernel/kernel

...
Cyclic reboot from "May 12 03:05:24" to "May 12 07:29:53"
...
May 12 07:28:17 gw1 syslogd: kernel boot file is /boot/kernel/kernel

May 12 07:29:53 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 08:14:58 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 10:29:52 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 17:24:51 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 12 17:50:41 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 17 11:40:06 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 21 03:03:15 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 22 03:03:25 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 24 03:03:18 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 24 14:16:03 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 24 14:31:04 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 26 03:02:18 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 26 11:29:54 gw1 syslogd: kernel boot file is /boot/kernel/kernel
May 29 03:02:16 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
May 31 12:40:41 gw1 syslogd: kernel boot file is /boot/kernel/kernel

bzcat /var/log/messages.0.bz2 | grep "/boot/kernel/kernel"

Jun  3 04:16:51 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun  4 03:04:06 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun  6 03:04:02 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun  6 10:01:10 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 18 03:02:58 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun 19 03:04:06 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun 20 03:04:06 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun 24 03:03:51 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun 25 03:04:03 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jun 26 11:30:05 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 26 11:44:14 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 26 11:52:44 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 26 14:00:36 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 26 20:58:33 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 27 12:58:37 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 28 19:26:47 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 28 20:30:40 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 29 16:26:22 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 30 16:03:56 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jun 30 16:07:14 gw1 syslogd: kernel boot file is /boot/kernel/kernel

cat /var/log/messages | grep "/boot/kernel/kernel"

Jul  1 03:04:00 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jul  2 03:03:37 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jul  2 16:40:31 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jul  3 09:53:46 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jul  3 11:17:00 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jul  3 12:30:02 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jul  7 03:03:48 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jul  8 04:17:36 gw1 syslogd: kernel boot file is /boot/kernel/kernel
Jul  9 03:04:30 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot
Jul 10 03:04:31 gw1 syslogd: kernel boot file is /boot/kernel/kernel <--- Next reboot

Log of start calculate:

09-Apr-2017 22:16:58 [LHC@home] Scheduler request completed: got 3 new tasks
09-Apr-2017 22:17:00 [LHC@home] Started download of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__76.5_1_sixvf_boinc47932.zip
09-Apr-2017 22:17:00 [LHC@home] Started download of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__78_1_sixvf_boinc47933.zip
09-Apr-2017 22:17:04 [LHC@home] Finished download of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__76.5_1_sixvf_boinc47932.zip
09-Apr-2017 22:17:04 [LHC@home] Finished download of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__78_1_sixvf_boinc47933.zip
09-Apr-2017 22:17:04 [LHC@home] Started download of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__79.5_1_sixvf_boinc47934.zip
09-Apr-2017 22:17:04 [LHC@home] Starting task w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__78_1_sixvf_boinc47933_0 using sixtrack version 45107 (pni) in slot 0
09-Apr-2017 22:17:04 [LHC@home] Starting task w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__76.5_1_sixvf_boinc47932_1 using sixtrack version 45107 (pni) in slot 1
09-Apr-2017 22:17:06 [LHC@home] Finished download of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__79.5_1_sixvf_boinc47934.zip
09-Apr-2017 22:17:17 [LHC@home] Computation for task w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__76.5_1_sixvf_boinc47932_1 finished
09-Apr-2017 22:17:17 [LHC@home] Starting task w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__79.5_1_sixvf_boinc47934_0 using sixtrack version 45107 (pni) in slot 1
09-Apr-2017 22:17:19 [LHC@home] Computation for task w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__78_1_sixvf_boinc47933_0 finished
09-Apr-2017 22:17:20 [LHC@home] Started upload of w-c7_lhc2016_40_MD-115-16-476-2.5-0.9247__14__s__64.31_59.32__8_9__6__76.5_1_sixvf_boinc47932_1_0
09-Apr-2017 22:17:20 [LHC@home] Sending scheduler request: To fetch work.

Work correct. No problem.
Software:
pkg version -v

autoconf-2.69_1                    =   up-to-date with port
autoconf-wrapper-20131203          =   up-to-date with port
automake-1.15_1                    =   up-to-date with port
automake-wrapper-20131203          =   up-to-date with port
boinc-client-7.2.33_6              =   up-to-date with port
boinc_curses-0.2.2_1               =   up-to-date with port
ca_root_nss-3.26                   =   up-to-date with port
curl-7.50.1                        =   up-to-date with port
dialog4ports-0.1.5_2               =   up-to-date with port
gettext-runtime-0.19.8.1           =   up-to-date with port
gettext-tools-0.19.8.1             =   up-to-date with port
gmake-4.2.1                        =   up-to-date with port
gmake-lite-4.2.1                   =   up-to-date with port
help2man-1.43.3_1                  =   up-to-date with port
indexinfo-0.2.4                    =   up-to-date with port
libtool-2.4.6                      =   up-to-date with port
linux_base-c6-6.8                  =   up-to-date with port
m4-1.4.17_1,1                      =   up-to-date with port
p5-Locale-gettext-1.06             =   up-to-date with port
perl5-5.20.3_15                    =   up-to-date with port
pkg-1.10.1                         >   succeeds port (port has 1.8.7_1)
pkgconf-0.9.12_1                   =   up-to-date with port
texinfo-6.1.20160425               =   up-to-date with port

boinc-client-7.2.33_6 installed from ports.
cat /var/db/ports/net_boinc-client/options

# This file is auto-generated by 'make config'.
# Options for boinc-client-7.2.33_6
_OPTIONS_READ=boinc-client-7.2.33_6
_FILE_COMPLETE_OPTIONS_LIST=CLIENT LINUX MANAGER NLS SKINS USER X11 NO_GUI_RPC NO_NET_INFO
OPTIONS_FILE_SET+=CLIENT
OPTIONS_FILE_SET+=LINUX
OPTIONS_FILE_UNSET+=MANAGER
OPTIONS_FILE_SET+=NLS
OPTIONS_FILE_UNSET+=SKINS
OPTIONS_FILE_SET+=USER
OPTIONS_FILE_UNSET+=X11
OPTIONS_FILE_UNSET+=NO_GUI_RPC
OPTIONS_FILE_SET+=NO_NET_INFO

from "09 Apr" till "29 Apr" computer good work:

Apr  9 22:14:23 gw1 su: creg to root on /dev/pts/0
Apr 10 00:45:20 gw1 su: creg to root on /dev/pts/0
Apr 10 01:47:55 gw1 kernel: ipfw: limit 500 reached on entry 65500
Apr 10 10:51:15 gw1 su: creg to root on /dev/pts/0
Apr 11 08:48:04 gw1 su: creg to root on /dev/pts/0
Apr 12 12:46:54 gw1 su: creg to root on /dev/pts/0
Apr 12 18:28:26 gw1 pkg-static: libsodium-1.0.3 installed
Apr 12 18:29:34 gw1 pkg-static: libevent2-2.0.22_1 installed
Apr 12 18:29:36 gw1 pkg-static: dnscrypt-wrapper-0.2_1 installed
Apr 13 15:23:07 gw1 su: creg to root on /dev/pts/0
Apr 14 09:46:34 gw1 su: creg to root on /dev/pts/0
Apr 14 11:08:19 gw1 su: creg to root on /dev/pts/0
Apr 15 20:25:55 gw1 su: creg to root on /dev/pts/0
Apr 17 10:31:08 gw1 su: creg to root on /dev/pts/0
Apr 18 10:37:41 gw1 su: creg to root on /dev/pts/0
Apr 19 20:56:15 gw1 su: BAD SU creg to root on /dev/pts/0
Apr 19 20:56:21 gw1 su: creg to root on /dev/pts/0
Apr 20 21:06:25 gw1 su: creg to root on /dev/pts/0
Apr 21 08:58:04 gw1 su: creg to root on /dev/pts/0
Apr 22 12:22:29 gw1 su: creg to root on /dev/pts/0
Apr 24 09:33:33 gw1 su: creg to root on /dev/pts/0
Apr 25 08:17:49 gw1 su: creg to root on /dev/pts/0
Apr 26 08:46:22 gw1 su: creg to root on /dev/pts/0
Apr 27 08:53:22 gw1 su: creg to root on /dev/pts/0
Apr 28 07:40:51 gw1 su: creg to root on /dev/pts/0

23-Apr-2017 added SETI@home

23-Apr-2017 18:13:13 [SETI@home] Requesting new tasks for CPU
23-Apr-2017 18:13:16 [SETI@home] Scheduler request completed: got 3 new tasks
23-Apr-2017 18:13:18 [SETI@home] Started download of 01mr08ab.18067.13160.15.42.103
23-Apr-2017 18:13:18 [SETI@home] Started download of 01mr08ab.18098.13160.16.43.137
23-Apr-2017 18:13:23 [SETI@home] Finished download of 01mr08ab.18067.13160.15.42.103
23-Apr-2017 18:13:23 [SETI@home] Finished download of 01mr08ab.18098.13160.16.43.137
23-Apr-2017 18:13:23 [SETI@home] Started download of 01mr08ab.18067.13160.15.42.209
23-Apr-2017 18:13:28 [SETI@home] Finished download of 01mr08ab.18067.13160.15.42.209
23-Apr-2017 19:33:20 [SETI@home] Computation for task 17fe08ab.17602.24203.12.39.184_1 finished
23-Apr-2017 19:33:20 [SETI@home] Starting task 19se08ab.6133.1299.8.35.127.vlar_0 using setiathome_v8 version 805 in slot 1
23-Apr-2017 19:33:23 [SETI@home] Started upload of 17fe08ab.17602.24203.12.39.184_1_r1506099239_0
23-Apr-2017 19:33:29 [SETI@home] Finished upload of 17fe08ab.17602.24203.12.39.184_1_r1506099239_0

Problem solved.
This is not a problem of boinc-client

reboot
load single mode
fsck -fy
tunefs -n disable

reboot
load single mode

newfs -N /dev/ada0
(get other super-block)

fsck_ffs -b [other super-block]

reboot
load single mode

fsck -fy
reboot