Segfault on pkg upgrade wit php5-pgsql locked

[list_freebsd at bluerosetech.com]

This is happening on 10.1-p3 amd64 after upgrading pkg from 1.4.4 to 1.4.12:

# pkg upgrade
Updating FreeBSD repository catalogue...
FreeBSD repository is up-to-date.
All repositories are up-to-date.
Checking for upgrades (48 candidates): 100%
Processing candidates (48 candidates): 100%

php5-pgsql-5.4.36 is locked and may not be modified
Child process pid=69616 terminated abnormally: Segmentation fault

Doing `pkg install -f pkg` then `pkg update -f` does not resolve this, 
but the problem is related to php5-pgsql being locked:

# pkg info -k php5-pgsql
php5-pgsql-5.4.36              yes

# pkg upgrade
Updating FreeBSD repository catalogue...
FreeBSD repository is up-to-date.
All repositories are up-to-date.
Checking for upgrades (48 candidates): 100%
Processing candidates (48 candidates): 100%

php5-pgsql-5.4.36 is locked and may not be modified
Child process pid=69731 terminated abnormally: Segmentation fault

# pkg unlock -xy php5-pgsql
Unlocking php5-pgsql-5.4.36

# pkg upgrade
Updating FreeBSD repository catalogue...
FreeBSD repository is up-to-date.
All repositories are up-to-date.
Checking for upgrades (48 candidates): 100%
Processing candidates (48 candidates): 100%
The following 50 packages will be affected (of 0 checked):

New packages to be INSTALLED:
         postgresql93-client: 9.3.6_1
         php56-session: 5.6.6
         php56: 5.6.6
         php56-xmlrpc: 5.6.6
         php56-xml: 5.6.6
         php56-mysql: 5.6.6
         php56-mbstring: 5.6.6
         php56-pgsql: 5.6.6

Installed packages to be UPGRADED:
         vim-lite: 7.4.560 -> 7.4.657
         unzip: 6.0_2 -> 6.0_6
         unbound: 1.5.1_2 -> 1.5.3_1
         tevent: 0.9.21 -> 0.9.22
         tdb: 1.2.13,1 -> 1.3.4,1
         tcpdump: 4.5.1 -> 4.6.2
         talloc: 2.1.0 -> 2.1.1
         sqlite3: 3.8.7.4 -> 3.8.8.2
         screen: 4.2.1_3 -> 4.2.1_5
         samba36: 3.6.24_2 -> 3.6.25
         postgresql92-server: 9.2.9_1 -> 9.2.10
         postgresql92-client: 9.2.9_1 -> 9.2.10_1
         pkgconf: 0.9.7 -> 0.9.8
         php5-xmlrpc: 5.4.36 -> 5.4.38
         php5-xml: 5.4.36 -> 5.4.38
         php5-session: 5.4.36 -> 5.4.38
         php5-pgsql: 5.4.36 -> 5.4.38
         php5-mysql: 5.4.36 -> 5.4.38
         php5-mbstring: 5.4.36 -> 5.4.38
         php5: 5.4.36 -> 5.4.38
         p5-Net-DNS: 0.81_1 -> 0.83_1
         p5-BerkeleyDB: 0.54_2 -> 0.55
         openssl: 1.0.1_16 -> 1.0.1_18
         ntp: 4.2.8_3 -> 4.2.8p1
         nsd: 4.1.0_1 -> 4.1.1
         libtool: 2.4.2.418 -> 2.4.5
         libpcap: 1.5.2 -> 1.6.2
         libevent2: 2.0.21_3 -> 2.0.22_1
         ldns: 1.6.17_3 -> 1.6.17_4
         isc-dhcp42-server: 4.2.7 -> 4.2.8
         gettext-tools: 0.19.3 -> 0.19.4
         gettext-runtime: 0.19.3 -> 0.19.4
         gettext: 0.19.3 -> 0.19.4
         curl: 7.39.0_1 -> 7.41.0
         cmake-modules: 3.1.0 -> 3.1.3
         cmake: 3.1.0 -> 3.1.3
         ca_root_nss: 3.17.3_1 -> 3.17.4_1
         bind-tools: 9.10.1P1 -> 9.10.2
         bash-static: 4.3.30_1 -> 4.3.33
         automake: 1.14_1 -> 1.15

Installed packages to be REINSTALLED:
         postfixadmin-2.3.7_1 (direct dependency changed)
         phppgadmin-5.1 (direct dependency changed)

The process will require 30 MiB more space.
62 MiB to be downloaded.

Proceed with this action? [y/N]: