Unguarded List.hd?

[djs55]

Against 0.9.3 attempting to bring up a VLAN:

Oct 30 14:10:55 brontitall xcp-networkd: [debug|brontitall|271|VLAN.create R:8442d0f031e0|network_server] Bringing up interf
ace brem2
Oct 30 14:10:55 brontitall xcp-networkd: [ info|brontitall|271|VLAN.create R:8442d0f031e0|network_utils] /sbin/ip link set b
rem2 up
Oct 30 14:10:55 brontitall xcp-networkd: [debug|brontitall|271|VLAN.create R:8442d0f031e0|network_server] Adding port em2 to
 bridge brem2 with interfaces em2
Oct 30 14:10:55 brontitall xcp-networkd: [debug|brontitall|271|VLAN.create R:8442d0f031e0|network_server] Bringing up interf
ace em2
Oct 30 14:10:55 brontitall xcp-networkd: [ info|brontitall|271|VLAN.create R:8442d0f031e0|network_utils] /sbin/ip link set e
m2 up
Oct 30 14:10:55 brontitall tapdisk[8275]: tapdisk-control: init, 10 x 4k buffers
Oct 30 14:10:55 brontitall tapdisk[8275]: I/O queue driver: lio
Oct 30 14:10:55 brontitall tapdisk[8275]: tapdisk-log: started, level 0
Oct 30 14:10:55 brontitall xcp-networkd: [debug|brontitall|271|VLAN.create R:8442d0f031e0|network_server] Creating bridge xa
pi1 (VLAN 12 on bridge brem2)
Oct 30 14:10:55 brontitall tapdisk[8275]: nbd: Set up local unix domain socket on path '/var/run/blktap-control/nbdclient827
5'
Oct 30 14:10:55 brontitall xcp-networkd: [ info|brontitall|271|VLAN.create R:8442d0f031e0|network_utils] /sbin/ip link set x
api1 address bc:30:5b:ce:ef:de
Oct 30 14:10:55 brontitall xapi: [debug|brontitall|24752 UNIX /var/lib/xcp/xapi|VLAN.create R:8442d0f031e0|backtrace] Raised
 at file \"ghost-location\", line 1, characters 0-0\nCalled from file \"nm.ml\", line 396, characters 3-54\nCalled from file
 \"network.ml\", line 30, characters 2-6\n
Oct 30 14:10:55 brontitall xapi: [error|brontitall|24752 UNIX /var/lib/xcp/xapi|VLAN.create R:8442d0f031e0|network] Caught I
NTERNAL_ERROR: [ Network_interface.Internal_error("Failure(\"hd\")") ] while trying to talk to xcp-networkd
Oct 30 14:10:55 brontitall xapi: [error|brontitall|24752 UNIX /var/lib/xcp/xapi|VLAN.create R:8442d0f031e0|network] Re-raisi
ng as PIF_CONFIGURATION_ERROR [ OpaqueRef:e1513f0d-cb72-1300-1405-4f4524def3a2;  ]

[robhoes]

I HATE unguarded List.hd calls...