Assert fail with AI game on Ice Wars, tested with https://code.launchpad.net/~widelands-dev/widelands/bug-1829471-worker-preciousness
I can't reproduce on trunk because I get some other, earlier assert failures from the AI.
Autosave: save took 1627 ms
7: attacking site at 250x242, score 4, with 3 soldiers, attacking 2 times, after 42 seconds
8: attacking site at 251x237, score 4, with 1 soldiers, attacking 1 times, after 7611 seconds
Forcing flag at (250, 242)
Cmd_EnemyFlagAction::execute player(8): flag->owner(7) number=1
widelands: ../src/logic/map_objects/tribes/militarysite.cc:887: void Widelands::MilitarySite::send_attacker(Widelands::Soldier&, Widelands::Building&): Assertion `is_present(soldier)' failed.
Thread 1 "widelands" received signal SIGABRT, Aborted.
__GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
51 ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) backtrace
#0 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#1 0x00007ffff434c801 in __GI_abort () at abort.c:79
#2 0x00007ffff433c39a in __assert_fail_base (fmt=0x7ffff44c37d8 "%s%s%s:%u: %s%sAssertion `%s' failed.\n%n", assertion=assertion@entry=0x555557819f40 "is_present(soldier)",
file=file@entry=0x555557818d00 "../src/logic/map_objects/tribes/militarysite.cc", line=line@entry=887,
function=function@entry=0x55555781bec0 <Widelands::MilitarySite::send_attacker(Widelands::Soldier&, Widelands::Building&)::__PRETTY_FUNCTION__> "void Widelands::MilitarySite::send_attacker(Widelands::Soldier&, Widelands::Building&)") at assert.c:92
#3 0x00007ffff433c412 in __GI___assert_fail (assertion=0x555557819f40 "is_present(soldier)", file=0x555557818d00 "../src/logic/map_objects/tribes/militarysite.cc", line=887,
function=0x55555781bec0 <Widelands::MilitarySite::send_attacker(Widelands::Soldier&, Widelands::Building&)::__PRETTY_FUNCTION__> "void Widelands::MilitarySite::send_attacker(Widelands::Soldier&, Widelands::Building&)") at assert.c:101
#4 0x0000555556d5f0cb in Widelands::MilitarySite::send_attacker (this=0x6140011b1440, soldier=..., target=...) at ../src/logic/map_objects/tribes/militarysite.cc:887
#5 0x00005555566cf57d in Widelands::Player::enemyflagaction (this=0x619000af8c80, flag=..., attacker=8 '\b', soldiers=std::vector of length 1, capacity 1 = {...})
at ../src/logic/player.cc:966
#6 0x0000555557097d01 in Widelands::CmdEnemyFlagAction::execute (this=0x604005f86d90, game=...) at ../src/logic/playercommand.cc:1614
#7 0x0000555557086759 in Widelands::CmdQueue::run_queue (this=0x7fffffff5968, interval=1953, game_time_var=@0x7fffffff50e8: 7622701) at ../src/logic/cmd_queue.cc:122
#8 0x00005555566a45a7 in Widelands::Game::think (this=0x7fffffff50e0) at ../src/logic/game.cc:598
#9 0x0000555556a78857 in InteractiveBase::think (this=0x62000006d080) at ../src/wui/interactive_base.cc:518
#10 0x0000555556903cde in UI::Panel::do_think (this=0x62000006d080) at ../src/ui_basic/panel.cc:483
#11 0x0000555556901043 in UI::Panel::do_run (this=0x62000006d080) at ../src/ui_basic/panel.cc:184
#12 0x000055555639c5ae in UI::Panel::run<UI::Panel::Returncodes> (this=0x62000006d080) at ../src/ui_basic/panel.h:104
#13 0x00005555566a3dcc in Widelands::Game::run (this=0x7fffffff50e0, loader_ui=0x614001182640, start_game_type=Widelands::Game::Loaded, script_to_run="", replay=false,
prefix_for_replays="nethost") at ../src/logic/game.cc:568
#14 0x00005555567ce31b in GameHost::run (this=0x7fffffff7440) at ../src/network/gamehost.cc:697
#15 0x0000555556386e4f in WLApplication::mainmenu_multiplayer (this=0x611000000180) at ../src/wlapplication.cc:1279
#16 0x00005555563855fa in WLApplication::mainmenu (this=0x611000000180) at ../src/wlapplication.cc:1117
#17 0x000055555637c5cc in WLApplication::run (this=0x611000000180) at ../src/wlapplication.cc:470
#18 0x000055555637831f in main (argc=1, argv=0x7fffffffde78) at ../src/main.cc:44
had the same crash today in a 4 AI player test on Fullmoon. Reloading the last savegame did not trigger the bug again. Seems to be non deterministic, so it might be a pain to track this down.