Also, the game still crashes when expanding the map in both x and y direction:
=================================================================
==4203==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x631000038800 at pc 0x0000010f47ec bp 0x7ffdf2e83bf0 sp 0x7ffdf2e83be8
READ of size 4 at 0x631000038800 thread T0
#0 0x10f47eb in karte_t::calc_climate_map_region(short, short, short, short) /home/ceeac/Projects/code/simutrans/simworld.cc:6190:66
#1 0x10e997d in karte_t::enlarge_map(settings_t const*, signed char const*) /home/ceeac/Projects/code/simutrans/simworld.cc:1960:3
#2 0x8dfc61 in enlarge_map_frame_t::action_triggered(gui_action_creator_t*, value_t) /home/ceeac/Projects/code/simutrans/gui/enlarge_map_frame_t.cc:151:9
#3 0x8dfe53 in non-virtual thunk to enlarge_map_frame_t::action_triggered(gui_action_creator_t*, value_t) /home/ceeac/Projects/code/simutrans/gui/enlarge_map_frame_t.cc
#4 0x7c57f1 in gui_action_creator_t::call_listeners(value_t) /home/ceeac/Projects/code/simutrans/gui/components/gui_action_creator.h:32:11
#5 0x7cafa1 in button_t::infowin_event(event_t const*) /home/ceeac/Projects/code/simutrans/gui/components/gui_button.cc:276:4
#6 0x7e7f27 in gui_container_t::infowin_event(event_t const*) /home/ceeac/Projects/code/simutrans/gui/components/gui_container.cc:201:23
#7 0x9156e9 in gui_frame_t::infowin_event(event_t const*) /home/ceeac/Projects/code/simutrans/gui/gui_frame.cc:132:34
#8 0xa8cbf7 in check_pos_win(event_t*) /home/ceeac/Projects/code/simutrans/gui/simwin.cc:1521:20
#9 0xfd3055 in interaction_t::process_event(event_t&) /home/ceeac/Projects/code/simutrans/siminteraction.cc:366:5
#10 0xfd3b92 in interaction_t::check_events() /home/ceeac/Projects/code/simutrans/siminteraction.cc:439:7
#11 0x1140c37 in karte_t::interactive(unsigned int) /home/ceeac/Projects/code/simutrans/simworld.cc:7167:17
#12 0xff0356 in simu_main(int, char**) /home/ceeac/Projects/code/simutrans/simmain.cc:1472:9
#13 0x122a54f in sysmain(int, char**) /home/ceeac/Projects/code/simutrans/sys/simsys.cc:1098:9
#14 0x12b8741 in main /home/ceeac/Projects/code/simutrans/sys/simsys_s2.cc:790:9
#15 0x7f98765970b2 in __libc_start_main /build/glibc-ZN95T4/glibc-2.31/csu/../csu/libc-start.c:308:16
#16 0x42696d in _start (/media/ceeac/Projects/code/simutrans/build/default/sim+0x42696d)
0x631000038800 is located 0 bytes to the right of 65536-byte region [0x631000028800,0x631000038800)
allocated by thread T0 here:
#0 0x4ce92d in operator new[](unsigned long) (/media/ceeac/Projects/code/simutrans/build/default/sim+0x4ce92d)
#1 0x10f40e2 in karte_t::calc_climate_map_region(short, short, short, short) /home/ceeac/Projects/code/simutrans/simworld.cc:6172:34
#2 0x10e997d in karte_t::enlarge_map(settings_t const*, signed char const*) /home/ceeac/Projects/code/simutrans/simworld.cc:1960:3
#3 0x8dfc61 in enlarge_map_frame_t::action_triggered(gui_action_creator_t*, value_t) /home/ceeac/Projects/code/simutrans/gui/enlarge_map_frame_t.cc:151:9
#4 0x8dfe53 in non-virtual thunk to enlarge_map_frame_t::action_triggered(gui_action_creator_t*, value_t) /home/ceeac/Projects/code/simutrans/gui/enlarge_map_frame_t.cc
#5 0x7c57f1 in gui_action_creator_t::call_listeners(value_t) /home/ceeac/Projects/code/simutrans/gui/components/gui_action_creator.h:32:11
#6 0x7cafa1 in button_t::infowin_event(event_t const*) /home/ceeac/Projects/code/simutrans/gui/components/gui_button.cc:276:4
#7 0x7e7f27 in gui_container_t::infowin_event(event_t const*) /home/ceeac/Projects/code/simutrans/gui/components/gui_container.cc:201:23
#8 0x9156e9 in gui_frame_t::infowin_event(event_t const*) /home/ceeac/Projects/code/simutrans/gui/gui_frame.cc:132:34
#9 0xa8cbf7 in check_pos_win(event_t*) /home/ceeac/Projects/code/simutrans/gui/simwin.cc:1521:20
#10 0xfd3055 in interaction_t::process_event(event_t&) /home/ceeac/Projects/code/simutrans/siminteraction.cc:366:5
#11 0xfd3b92 in interaction_t::check_events() /home/ceeac/Projects/code/simutrans/siminteraction.cc:439:7
#12 0x1140c37 in karte_t::interactive(unsigned int) /home/ceeac/Projects/code/simutrans/simworld.cc:7167:17
#13 0xff0356 in simu_main(int, char**) /home/ceeac/Projects/code/simutrans/simmain.cc:1472:9
#14 0x122a54f in sysmain(int, char**) /home/ceeac/Projects/code/simutrans/sys/simsys.cc:1098:9
#15 0x12b8741 in main /home/ceeac/Projects/code/simutrans/sys/simsys_s2.cc:790:9
#16 0x7f98765970b2 in __libc_start_main /build/glibc-ZN95T4/glibc-2.31/csu/../csu/libc-start.c:308:16
SUMMARY: AddressSanitizer: heap-buffer-overflow /home/ceeac/Projects/code/simutrans/simworld.cc:6190:66 in karte_t::calc_climate_map_region(short, short, short, short)
Shadow bytes around the buggy address:
0x0c627ffff0b0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c627ffff0c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c627ffff0d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c627ffff0e0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
0x0c627ffff0f0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
=>0x0c627ffff100:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c627ffff110: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c627ffff120: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c627ffff130: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c627ffff140: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
0x0c627ffff150: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
Shadow byte legend (one shadow byte represents 8 application bytes):
Addressable: 00
Partially addressable: 01 02 03 04 05 06 07
Heap left redzone: fa
Freed heap region: fd
Stack left redzone: f1
Stack mid redzone: f2
Stack right redzone: f3
Stack after return: f5
Stack use after scope: f8
Global redzone: f9
Global init order: f6
Poisoned by user: f7
Container overflow: fc
Array cookie: ac
Intra object redzone: bb
ASan internal: fe
Left alloca redzone: ca
Right alloca redzone: cb
Shadow gap: cc
==4203==ABORTING