drifting pirate ship crashes server

[stm2]

The following test causes a segfault (don't know why) function test_pirate() local r1 = region.create(0, 0, "ocean") local r2 = region.create(1, 0, "ocean") local f1 = faction.create("[email protected]", "human", "de") local f2 = faction.create("[email protected]", "human", "de") local u1 = unit.create(f1, r1, 1) u1.ship = ship.create(r1, "boat") u1.ship.owner = u1 u1:add_item("money", 100) u1:set_skill("sailing", 5)

local u2 = unit.create(f2, r1, 1)
u2.ship = ship.create(r1, "boat")
u2:add_item("money", 100)

-- ship will drift and then attempt to do piracy ==> segfault -- u2:set_skill("sailing", 5) u2.ship.owner = u2

u2:add_order("PIRATERIE")

process_orders()
write_reports()

end

e2 run-tests (1) [C/C++ Application]
/home/steffen/git/server-stm/build-x86_64-gcc-Debug/eressea/eressea [1363] [cores: 1]
Thread [1] 1363 [core: 1](Suspended : Signal : SIGSEGV:Segmentation fault) _IO_vfprintf_internal() at /build/buildd/eglibc-2.19/stdio-common/vfprintf.c:1,661 0x7ffff6abea03
_IO_vsnprintf() at /build/buildd/eglibc-2.19/libio/vsnprintf.c:119 0x7ffff6ae5579
slprintf() at /home/steffen/git/server-stm/src/util/bsdstring.c:121 0x4f2642
write_unitname() at /home/steffen/git/server-stm/src/kernel/unit.c:1,860 0x4e6e90
unitname() at /home/steffen/git/server-stm/src/kernel/unit.c:1,869 0x4e6eff eval_unit() at /home/steffen/git/server-stm/src/reports.c:1,842 0x46263b
parse_symbol() at /home/steffen/git/server-stm/src/util/translation.c:222 0x4f8bc2
parse_string() at /home/steffen/git/server-stm/src/util/translation.c:290 0x4f8d90
parse() at /home/steffen/git/server-stm/src/util/translation.c:352 0x4f8fef translate() at /home/steffen/git/server-stm/src/util/translation.c:397 0x4f928f nr_render() at /home/steffen/git/server-stm/src/util/nrmessage.c:151 0x4f76fe
log_orders() at /home/steffen/git/server-stm/src/reports.c:2,249 0x464098
msg_create() at /home/steffen/git/server-stm/src/util/message.c:157 0x4f6cdb
msg_feedback() at /home/steffen/git/server-stm/src/kernel/messages.c:143 0x4d05ee
ship_ready() at /home/steffen/git/server-stm/src/move.c:1,726 0x43757a
sail() at /home/steffen/git/server-stm/src/move.c:1,814 0x437a41
move_cmd() at /home/steffen/git/server-stm/src/move.c:2,274 0x43962e
piracy_cmd() at /home/steffen/git/server-stm/src/piracy.c:208 0x43b0d0
move_pirates() at /home/steffen/git/server-stm/src/move.c:2,483 0x43a011
movement() at /home/steffen/git/server-stm/src/move.c:2,598 0x43a3de
<...more frames...> gdb