ERROR in 'prompt.cc' at line 387: slot not a letter: null (0)

Version: Dungeon Crawl Stone Soup 0.34-a0-377-g2aa8828f32
Platform: unix
Bits: 64
Game mode: normal
Tiles: online

Seed: 7297704716943983673, deterministic pregen: 1
Command line: /usr/games/crawl-git-2aa8828f32 -name psychicmeow -rc /dgldir/rcfiles/crawl-git/psychicmeow.rc -macro /dgldir/rcfiles/crawl-git/psychicmeow.macro -morgue /dgldir/morgue/psychicmeow/ -webtiles-socket /crawl-master/webserver/sockets/psychicmeow:2025-07-17.18:49:21.sock -await-connection

RC options:
restart_after_game = false


Crash caused by signal #6: Aborted

Obtained 23 stack frames.
/usr/games/crawl-git-2aa8828f32(_Z17write_stack_traceP8_IO_FILE+0x3e) [0x615a534974fe]: write_stack_trace(_IO_FILE*)
/usr/games/crawl-git-2aa8828f32(_Z13do_crash_dumpv+0x43a) [0x615a534a55ca]: do_crash_dump()
/usr/games/crawl-git-2aa8828f32(_Z20crash_signal_handleri+0x1fa) [0x615a534979da]: crash_signal_handler(int)
/lib/x86_64-linux-gnu/libc.so.6(+0x42910) [0x7cb0e1a42910]: 
/lib/x86_64-linux-gnu/libc.so.6(pthread_kill+0x11b) [0x7cb0e1a9999b]: 
/lib/x86_64-linux-gnu/libc.so.6(raise+0x16) [0x7cb0e1a42866]: 
/usr/games/crawl-git-2aa8828f32(+0x4e499d) [0x615a534a499d]: 
/usr/games/crawl-git-2aa8828f32(_Z3diePKciS0_z+0x166) [0x615a534a5016]: die(char const*, int, char const*, ...)
/usr/games/crawl-git-2aa8828f32(_Z15letter_to_indexi+0x85) [0x615a539b2ea5]: letter_to_index(int)
/usr/games/crawl-git-2aa8828f32(+0x6e386d) [0x615a536a386d]: 
/usr/games/crawl-git-2aa8828f32(_ZSt16__insertion_sortIN9__gnu_cxx17__normal_iteratorIPP8InvEntrySt6vectorIS3_SaIS3_EEEENS0_5__ops15_Iter_comp_iterI21menu_entry_comparatorEEEvT_SD_T0_+0xd8) [0x615a536af098]: void std::__insertion_sort<__gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > >, __gnu_cxx::__ops::_Iter_comp_iter<menu_entry_comparator> >(__gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > >, __gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > >, __gnu_cxx::__ops::_Iter_comp_iter<menu_entry_comparator>)
/usr/games/crawl-git-2aa8828f32(_ZN7InvMenu10load_itemsERKSt6vectorIPK8item_defSaIS3_EESt8functionIFP9MenuEntrySA_EE11menu_letterbb+0x82d) [0x615a536ab1dd]: InvMenu::load_items(std::vector<item_def const*, std::allocator<item_def const*> > const&, std::function<MenuEntry* (MenuEntry*)>, menu_letter, bool, bool)
/usr/games/crawl-git-2aa8828f32(_ZN11UseItemMenu13populate_menuEv+0x411) [0x615a536b7591]: UseItemMenu::populate_menu()
/usr/games/crawl-git-2aa8828f32(_ZN11UseItemMenu5resetE15operation_typesPKc+0x128) [0x615a536b7ed8]: UseItemMenu::reset(operation_types, char const*)
/usr/games/crawl-git-2aa8828f32(_ZN11UseItemMenuC1E15operation_typesiPKc+0x133) [0x615a536b8183]: UseItemMenu::UseItemMenu(operation_types, int, char const*)
/usr/games/crawl-git-2aa8828f32(_Z16use_an_item_menuRP8item_def15operation_typesiPKcSt8functionIFbvEE+0x40) [0x615a536b8200]: use_an_item_menu(item_def*&, operation_types, int, char const*, std::function<bool ()>)
/usr/games/crawl-git-2aa8828f32(_Z11use_an_item15operation_typesP8item_def+0x2ca) [0x615a536bda3a]: use_an_item(operation_types, item_def*)
/usr/games/crawl-git-2aa8828f32(+0xc80c1a) [0x615a53c40c1a]: 
/usr/games/crawl-git-2aa8828f32(+0xc817a5) [0x615a53c417a5]: 
/usr/games/crawl-git-2aa8828f32(main+0x1f7) [0x615a533cc627]: 
/lib/x86_64-linux-gnu/libc.so.6(+0x280d0) [0x7cb0e1a280d0]: 
/lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0x89) [0x7cb0e1a28189]: 
/usr/games/crawl-git-2aa8828f32(_start+0x25) [0x615a533cd115]: 

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[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
0x00007cb0e1b0fbf7 in __GI___wait4 (pid=1041273, stat_loc=0x0, options=0, usage=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:30
#0  0x00007cb0e1b0fbf7 in __GI___wait4 (pid=1041273, stat_loc=0x0, options=0, usage=0x0) at ../sysdeps/unix/sysv/linux/wait4.c:30
        sc_ret = -512
        sc_ret = <optimized out>
#1  0x0000615a53497bac in call_gdb (file=0x7cb0e1bff6c0 <_IO_2_1_stderr_>) at crash.cc:438
        gdb = <optimized out>
        attach_cmd = "attach 1041117\000\000\000\000\000"
#2  0x0000615a534a55e8 in do_crash_dump () at dbg-asrt.cc:673
        t = 1752778484
        dir = "/dgldir/morgue/psychicmeow/"
        name = "/dgldir/morgue/psychicmeow/crash-psychicmeow-20250717-185444.txt", '\000' <repeats 115 times>
        signal_info = "Crash caused by signal #6: Aborted"
        cause_msg = "ERROR in 'prompt.cc' at line 387: slot not a letter: null (0)"
        file = 0x7cb0e1bff6c0 <_IO_2_1_stderr_>
#3  0x0000615a534979da in crash_signal_handler (sig_num=6) at crash.cc:198
No locals.
#4  <signal handler called>
No locals.
#5  __pthread_kill_implementation (no_tid=0, signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:44
        tid = <optimized out>
        ret = 0
        pd = <optimized out>
        old_mask = {__val = {140735134253328}}
        ret = <optimized out>
        pd = <optimized out>
        old_mask = <optimized out>
        ret = <optimized out>
        tid = <optimized out>
        ret = <optimized out>
        resultvar = <optimized out>
        resultvar = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
        __futex = <optimized out>
        resultvar = <optimized out>
        __arg3 = <optimized out>
        __arg2 = <optimized out>
        __arg1 = <optimized out>
        _a3 = <optimized out>
        _a2 = <optimized out>
        _a1 = <optimized out>
        __futex = <optimized out>
        __private = <optimized out>
        __oldval = <optimized out>
#6  __pthread_kill_internal (signo=6, threadid=<optimized out>) at ./nptl/pthread_kill.c:78
No locals.
#7  __GI___pthread_kill (threadid=<optimized out>, signo=signo@entry=6) at ./nptl/pthread_kill.c:89
No locals.
#8  0x00007cb0e1a42866 in __GI_raise (sig=6) at ../sysdeps/posix/raise.c:26
        ret = <optimized out>
#9  0x0000615a534a499d in _BreakStrToDebugger (mesg=mesg@entry=0x7fff73af4910 "ERROR in 'prompt.cc' at line 387: slot not a letter: null (0)", assert=false) at dbg-asrt.cc:799
No locals.
#10 0x0000615a534a5016 in die (file=file@entry=0x615a53c7dcef "prompt.cc", line=line@entry=387, format=format@entry=0x615a53c7dd1a "slot not a letter: %s (%d)") at dbg-asrt.cc:859
        tmp = "slot not a letter: null (0)", '\000' <repeats 2020 times>
        mesg = "ERROR in 'prompt.cc' at line 387: slot not a letter: null (0)", '\000' <repeats 2009 times>
        args = {{gp_offset = 40, fp_offset = 48, overflow_arg_area = 0x7fff73af5210, reg_save_area = 0x7fff73af5130}}
#11 0x0000615a539b2ea5 in letter_to_index (the_letter=0) at prompt.cc:387
No locals.
#12 0x0000615a536a386d in sort_item_slot (a=<optimized out>) at invent.cc:786
No locals.
#13 compare_item_fn<int, sort_item_slot> (a=<optimized out>, b=0x615a56bfafb0) at invent.cc:750
No locals.
#14 0x0000615a536af098 in item_comparator::compare (this=0x615a56005d70, b=<optimized out>, a=<optimized out>) at /home/crawl-dev/dgamelaunch-config/crawl-build/crawl-git-repository/crawl-ref/source/externs.h:297
No locals.
#15 _compare_invmenu_items (cmps=<optimized out>, b=0x615a56bfafb0, a=0x615a56bc24f0) at invent.cc:822
        cmp = <optimized out>
        comparator = @0x615a56005d70: {cmpfn = 0x615a536a3850 <compare_item_fn<int, sort_item_slot>(InvEntry const*, InvEntry const*)>, negated = false}
        __for_range = <optimized out>
        __for_begin = <optimized out>
        __for_end = <optimized out>
#16 menu_entry_comparator::operator() (this=<synthetic pointer>, b=<optimized out>, a=0x615a56bc24f0) at invent.cc:842
        ia = 0x615a56bc24f0
        ib = 0x615a56bfafb0
        ia = <optimized out>
        ib = <optimized out>
#17 __gnu_cxx::__ops::_Iter_comp_iter<menu_entry_comparator>::operator()<__gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > >, __gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > > > (__it2=0x615a56bfafb0, __it1=0x615a56bc24f0, this=<synthetic pointer>) at /usr/include/c++/13/bits/predefined_ops.h:158
No locals.
#18 std::__insertion_sort<__gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > >, __gnu_cxx::__ops::_Iter_comp_iter<menu_entry_comparator> > (__first=..., __last=..., __last@entry=0x30, __comp=__comp@entry=...) at /usr/include/c++/13/bits/stl_algo.h:1819
        __i = 0x615a56bc24f0
#19 0x0000615a536aa9a8 in std::__final_insertion_sort<__gnu_cxx::__normal_iterator<InvEntry**, std::vector<InvEntry*, std::allocator<InvEntry*> > >, __gnu_cxx::__ops::_Iter_comp_iter<menu_entry_comparator> > (__comp=..., __last=..., __first=...) at /usr/include/c++/13/bits/stl_algo.h:1864
No locals.
#20 0x0000615a536ab1dd in InvMenu::load_items(std::vector<item_def const*, std::allocator<item_def const*> > const&, std::function<MenuEntry* (MenuEntry*)>, menu_letter, bool, bool) (this=this@entry=0x7fff73af56a0, mitems=std::vector of length 4, capacity 4 = {...}, procfn=..., ckey=..., ckey@entry=..., sort=sort@entry=true, subkeys=<optimized out>, subkeys@entry=false) at invent.cc:1018
        i = <optimized out>
        subtitle = "Hand Weapons"
        forced_first = 0x0
        obj = <optimized out>
        inv_class = {mData = {4, 0 <repeats 19 times>}}
        items_in_class = std::vector of length 4, capacity 4 = {0x615a56bfafb0, 0x615a56bc24f0, 0x615a56f0ca70, 0x615a56b30f40}
        cond = <optimized out>
        select_all = ""
#21 0x0000615a536b7591 in UseItemMenu::populate_menu (this=0x7fff73af56a0) at item-use.cc:508
        use_category_selection = true
#22 0x0000615a536b7ed8 in UseItemMenu::reset (this=this@entry=0x7fff73af56a0, _oper=<optimized out>, prompt_override=prompt_override@entry=0x0) at item-use.cc:349
No locals.
#23 0x0000615a536b8183 in UseItemMenu::UseItemMenu (this=0x7fff73af56a0, _oper=<optimized out>, item_type=<optimized out>, prompt=0x0) at item-use.cc:371
No locals.
#24 0x0000615a536b8200 in use_an_item_menu(item_def*&, operation_types, int, char const*, std::function<bool ()>) (target=@0x7fff73af59c8: 0x0, oper=oper@entry=OPER_WIELD, item_type=item_type@entry=-1, prompt=prompt@entry=0x0, allowcancel=...) at item-use.cc:1728
        menu = {<InvMenu> = {<Menu> = {_vptr.Menu = 0x615a53fc0c00 <vtable for UseItemMenu+16>, f_selitem = 0x0, f_keyfilter = {<std::_Maybe_unary_or_binary_function<int, int>> = {<std::unary_function<int, int>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}, on_single_selection = {<std::_Maybe_unary_or_binary_function<bool, MenuEntry const&>> = {<std::unary_function<MenuEntry const&, bool>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}, on_examine = {<std::_Maybe_unary_or_binary_function<bool, MenuEntry const&>> = {<std::unary_function<MenuEntry const&, bool>> = {<No data fields>}, <No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}, on_show = {<std::_Maybe_unary_or_binary_function<bool>> = {<No data fields>}, <std::_Function_base> = {static _M_max_size = 16, static _M_max_align = 8, _M_functor = {_M_unused = {_M_object = 0x0, _M_const_object = 0x0, _M_function_pointer = 0x0, _M_member_pointer = NULL}, _M_pod_data = '\000' <repeats 15 times>}, _M_manager = 0x0}, _M_invoker = 0x0}, action_cycle = Menu::CYCLE_NONE, menu_action = Menu::ACT_EXECUTE, _title_prompt_help_tag = "", title = 0x615a564a0410, title2 = 0x0, m_indent_title = false, flags = 270914, tag = "use_item", cur_page = 1, num_pages = 24922, more = {ops = std::vector of length 0, capacity 0}, m_keyhelp_more = false, items = std::vector of length 6, capacity 8 = {0x615a56f4b8c0, 0x615a56f4b350, 0x615a56f4aa70, 0x615a56b5c370, 0x615a56c82090, 0x615a56c449e0}, sel = std::vector of length 0, capacity 0, select_filter = std::vector of length 0, capacity 0, highlighter = 0x615a563cddd0, num = -1, lastch = 0, alive = false, more_needs_init = true, remap_numpad = true, last_hovered = -1, m_kmc = KMC_MENU, m_filter = 0x0, m_ui = {popup = std::shared_ptr<ui::Popup> (empty) = {get() = 0x0}, menu = std::shared_ptr<UIMenu> (use count 2, weak count 1) = {get() = 0x615a56b01000}, scroller = std::shared_ptr<ui::Scroller> (use count 2, weak count 1) = {get() = 0x615a56c297a0}, title = std::shared_ptr<ui::Text> (use count 2, weak count 1) = {get() = 0x615a56f2b740}, more = std::shared_ptr<UIMenuMore> (use count 2, weak count 1) = {get() = 0x615a56ca1af0}, more_bin = std::shared_ptr<UIShowHide> (empty) = {get() = 0x0}, vbox = std::shared_ptr<ui::Box> (use count 1, weak count 1) = {get() = 0x615a56c4b4e0}}, _webtiles_title_changed = true, _webtiles_title = {ops = std::vector of length 2, capacity 2 = {{type = FSOP_COLOUR, colour = 15, text = ""}, {type = FSOP_TEXT, colour = -1, text = "Wield which item (- for none)?"}}}}, type = menu_type::invlist, pre_select = 0x0, title_annotate = 0x0, temp_title = "", _mode_special_drop = false}, display_all = false, is_inventory = true, item_type_filter = -2, oper = OPER_WIELD, saved_inv_item = 27000, saved_hover = -1, last_inv_pos = 3, item_inv = std::vector of length 1, capacity 1 = {0x615a541c92e0 <you+6080>}, item_floor = std::vector of length 4, capacity 4 = {0x615a54208928 <env+904>, 0x615a54208c28 <env+1672>, 0x615a54208ca8 <env+1800>, 0x615a54208ea8 <env+2312>}, do_easy_floor = false, inv_header = 0x615a56f4b350, floor_header = 0x615a56c82090, available_modes = std::vector of length 4, capacity 4 = {OPER_EQUIP, OPER_WIELD, OPER_WEAR, OPER_PUTON}}
        choice_made = <optimized out>
        tmp_tgt = <optimized out>
#25 0x0000615a536bda3a in use_an_item (oper=OPER_WIELD, target=<optimized out>) at item-use.cc:1011
No locals.
#26 0x0000615a53c40c1a in _input () at main.cc:1268
        cmd = CMD_WIELD_WEAPON
        real_prev_cmd = CMD_MOVE_DOWN_LEFT
        player_disabled = {was_disabled = false}
#27 0x0000615a53c417a5 in _launch_game () at main.cc:493
        game_start = <optimized out>
        ccon = {cstate = false}
#28 0x0000615a533cc627 in _launch_game_loop () at main.cc:392
        game_ended = false
        game_ended = <optimized out>
        ge = <optimized out>
        fe = <optimized out>
#29 main (argc=12, argv=0x7fff73af6058) at main.cc:342
        echo = {prev_state = {value = maybe_bool::mbool_t::maybe, static maybe =