To reproduce, start a single player game with Golden Peninsula and build a barrier and a FOrtress to get north, then attack the AI.
revno: 7162
Log:
Vision check successful for player 2
took 30ms
Reading Player Message Data ... took 1ms
Reading Objective Data ... took 1ms
Reading Scripting Data ... took 4ms
WL_Map_Loader::load_map_complete() took 172ms
Game: Read_Complete took: 176ms
Game: Reading Player Economies Info ... took 2ms
Game: Reading Command Queue Data ... took 32ms
Game: Parsing messages ... took 0ms
Game: Reading Interactive Player Data ... took 2ms
Game_Loader::load() took 728ms
Done reloading the game from replay
Replay writer has started
[sync] Reset
ComputerPlayer(2): initializing (2)
Forcing flag at (43, 59)
Message: adding (wh) (warehouse) 1
Forcing flag at (42, 21)
Message: adding (wh) (warehouse) 2
Cmd_EnemyFlagAction::execute player(1): flag->owner(2) number=11
Fata exception: boost::too_many_args: format-string referred to less arguments than were passed
Game: Writing Preload Data ... took 192ms
Game: Writing Game Class Data ... took 0ms
Game: Writing Player Info ... took 9ms
Game: Writing Map Data!
Writing Elemental Data ... took 12ms
Writing Player Names And Tribe Data ... took 0ms
Writing Port Spaces Data ... took 0ms
Writing Heights Data ... took 1ms
Writing Terrain Data ... took 14ms
Writing Player Start Position Data ... took 0ms
Writing Player Message Data ... took 2ms
Writing Resources Data ... took 5ms
Writing Map Extra Data ... took 43ms
Writing Map Version ... took 0ms
Writing Allowed Worker Types Data ... took 0ms
Writing Flag Data ... took 2ms
Writing Road Data ... took 0ms
Writing Building Data ... took 1ms
Writing Map Objects ... took 34ms
Writing Flagdata Data ... took 1ms
Writing Roaddata Data ... took 1ms
Writing Buildingdata Data ... took 51ms
Writing Node Ownership Data ... took 2ms
Writing Exploration Data ... took 3ms
Writing Players Unseen Data ... took 18ms
Writing Scripting Data ... took 45ms
Writing Objective Data ... took 4ms
Map_Saver::save() took 239ms
Game: Writing Map Data took 251ms
Game: Writing Player Economies Info ... took 0ms
Game: Writing Command Queue Data ... took 1041ms
Game: Writing Interactive Player Data ... took 0ms
Game_Saver::save() took 1493ms
SaveHandler::save_game() took 1570ms
terminate called after throwing an instance of 'boost::exception_detail::clone_impl<boost::exception_detail::error_info_injector<boost::io::too_many_args> >'
what(): boost::too_many_args: format-string referred to less arguments than were passed
Aborted (core dumped)
I got the same crash here by following your steps to reproduce. Interesting note; I first launched one attack which failed without seeing any problems. Though on the second attack wave it crashed. It might have been triggered by winning the battle/conquering the enemy building.
I've attached a stacktrace.