[Freeciv-Dev] Re: (PR#10415) segfault in map_distance_vector()

["Marko Lindqvist" <marko.lindqvist@xxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=10415 >


  Another map_distance_vector() segfault. This time it originates from 
hut_get_barbarians().

  "CVS Oct 2 08:31 EEST", attached autogame.


Program received signal SIGSEGV, Segmentation fault.
map_distance_vector (dx=0x22ea80, dy=0x22ea84, tile0=0x1028f638, tile1=0x0)
     at ../../freeciv-src/common/map.c:1541
1541      base_map_distance_vector(dx, dy,


(gdb) bt
#0  map_distance_vector (dx=0x22ea80, dy=0x22ea84, tile0=0x1028f638, 
tile1=0x0)
     at ../../freeciv-src/common/map.c:1541
#1  0x004672a6 in real_map_distance (tile0=0x1028f638, tile1=0x0)
     at ../../freeciv-src/common/map.c:649
#2  0x00468b48 in is_tiles_adjacent (tile0=0x1028f638, tile1=0x0)
     at ../../freeciv-src/common/map.c:1277
#3  0x004b678a in test_unit_move_to_tile (type=20, unit_owner=0x5cc4b0, 
activity=ACTIVITY_IDLE,
     pfromtile=0x1028f638, ptotile=0x0, igzoc=true) at 
../../freeciv-src/common/unit.c:1505
#4  0x004b673f in can_unit_move_to_tile (punit=0x10ceb458, dst_tile=0x0, 
igzoc=1)
     at ../../freeciv-src/common/unit.c:1468
#5  0x00445df0 in unleash_barbarians (ptile=0x1028f638)
     at ../../freeciv-src/server/barbarian.c:249
#6  0x00442b43 in hut_get_barbarians (punit=0x1120ed80)
     at ../../freeciv-src/server/unittools.c:2298
#7  0x00442d64 in unit_enter_hut (punit=0x1120ed80) at 
../../freeciv-src/server/unittools.c:2379
#8  0x00443c7a in move_unit (punit=0x1120ed80, pdesttile=0x1028f638, 
move_cost=3)
     at ../../freeciv-src/server/unittools.c:2777
#9  0x0045301e in handle_unit_move_request (punit=0x1120ed80, 
pdesttile=0x1028f638, igzoc=false,
     move_diplomat_city=false) at ../../freeciv-src/server/unithand.c:1133
#10 0x004c7578 in ai_unit_attack (punit=0x1120ed80, ptile=0x1028f638)
     at ../../freeciv-src/ai/aitools.c:480
#11 0x004c6721 in ai_unit_execute_path (punit=0x1120ed80, path=0x10e52240)
     at ../../freeciv-src/ai/aitools.c:123
#12 0x004ca346 in ai_military_rampage (punit=0x1120ed80, thresh_adj=1, 
thresh_move=1)
     at ../../freeciv-src/ai/aiunit.c:754
#13 0x004cd165 in ai_military_attack (pplayer=0x5a9eb0, punit=0x1120ed80)
     at ../../freeciv-src/ai/aiunit.c:1769
#14 0x004cdc6c in ai_manage_military (pplayer=0x5a9eb0, punit=0x1120ed80)
     at ../../freeciv-src/ai/aiunit.c:2043
#15 0x004ce484 in ai_manage_units (pplayer=0x5a9eb0) at 
../../freeciv-src/ai/aiunit.c:2203
#16 0x004056d8 in ai_start_turn () at 
../../freeciv-src/server/srv_main.c:469
#17 0x004059af in begin_phase (is_new_phase=true) at 
../../freeciv-src/server/srv_main.c:542
#18 0x004078b5 in main_loop () at ../../freeciv-src/server/srv_main.c:1509
#19 0x00407b5b in srv_main () at ../../freeciv-src/server/srv_main.c:1628
#20 0x0040140f in main (argc=3, argv=0x10101c48) at 
../../freeciv-src/server/civserver.c:170


(gdb) frame 4
#4  0x004b673f in can_unit_move_to_tile (punit=0x10ceb458, dst_tile=0x0, 
igzoc=1)
     at ../../freeciv-src/common/unit.c:1468
1468      return MR_OK == test_unit_move_to_tile(punit->type, 
unit_owner(punit),


(gdb) p *punit
$1 = {type = 20, id = 2306, owner = 11, tile = 0x1028f638, homecity = 0, 
moves_left = 6,
   hp = 10, veteran = 0, unhappiness = 0, upkeep = 0, upkeep_food = 0, 
upkeep_gold = 0, fuel = 5,
   bribe_cost = -1, ai = {control = false, ai_role = AIUNIT_NONE, 
ferryboat = 0, passenger = 0,
     bodyguard = 0, charge = 0, prev_struct = 0x0, cur_struct = 0x0, 
prev_pos = 0x0,
     cur_pos = 0x0, target = 0, hunted = 0}, activity = ACTIVITY_IDLE, 
goto_tile = 0x0,
   activity_count = 0, activity_target = S_NO_SPECIAL, focus_status = 
FOCUS_AVAIL, ord_map = 0,
   ord_city = 0, foul = false, debug = false, moved = false, paradropped 
= false,
   done_moving = false, transported_by = -1, occupy = 0, client = {color 
= 0},
   has_orders = false, orders = {length = 0, index = 0, repeat = false, 
vigilant = false,
     list = 0x0}}


(gdb) p game.year
$2 = 1670


(gdb) p unit_name(punit->type)
$3 = 0x620160 "Knights"


(gdb) frame 6
#6  0x00442b43 in hut_get_barbarians (punit=0x1120ed80)
     at ../../freeciv-src/server/unittools.c:2298
2298        ok = unleash_barbarians(unit_tile);


(gdb) p *unit_tile
$4 = {x = 59, y = 47, nat_x = 59, nat_y = 47, index = 3725, terrain = 10,
   special = S_NO_SPECIAL, city = 0x0, units = {list = {nelements = 4, 
head_link = 0x111dcda8,
       tail_link = 0x10dfde98}}, known = 4079, assigned = 0, worked = 
0x0, continent = 8,
   move_cost = "\t\006HHHHHH", owner = 0x0, client = {hilite = 
HILITE_NONE}, spec_sprite = 0x0}


(gdb) frame 7
#7  0x00442d64 in unit_enter_hut (punit=0x1120ed80) at 
../../freeciv-src/server/unittools.c:2379
2379        ok = hut_get_barbarians(punit);


(gdb) p *punit
$5 = {type = 0, id = 1953719636, owner = 29285, tile = 0x0, homecity = 
0, moves_left = 0,
   hp = 0, veteran = 0, unhappiness = 0, upkeep = 1935765077, 
upkeep_food = 1852270963,
   upkeep_gold = 25701, fuel = 0, bribe_cost = 0, ai = {control = false, 
ai_role = AIUNIT_NONE,
     ferryboat = 0, passenger = 1, bodyguard = 2, charge = 2, 
prev_struct = 0x4e,
     cur_struct = 0xff, prev_pos = 0x0, cur_pos = 0xea, target = 1, 
hunted = -1},
   activity = ACTIVITY_POLLUTION, goto_tile = 0xe0, activity_count = 
660, activity_target = 5,
   focus_status = FOCUS_AVAIL, ord_map = 0, ord_city = 0, foul = true, 
debug = false,
   moved = false, paradropped = false, done_moving = 16, transported_by 
= 0, occupy = 20,
   client = {color = 0}, has_orders = false, orders = {length = 0, index 
= 16, repeat = false,
     vigilant = false, list = 0x0}}


(gdb) p unit_name(punit->type)
$6 = 0x61bf20 "Settlers"



  - Caz