(gdb) bt
#0  __pthread_kill_implementation (threadid=<optimized out>,
    signo=signo@entry=6, no_tid=no_tid@entry=0) at pthread_kill.c:44
#1  0x00007fa924aa15b3 in __pthread_kill_internal (signo=6,
    threadid=<optimized out>) at pthread_kill.c:78
#2  0x00007fa924a54d46 in __GI_raise (sig=sig@entry=6)
    at ../sysdeps/posix/raise.c:26
#3  0x00007fa924a28885 in __GI_abort () at abort.c:100
#4  0x00007fa924a29130 in __libc_message (fmt=<optimized out>,
    fmt@entry=0x7fa924bbb6bd "%s\n") at ../sysdeps/posix/libc_fatal.c:150
#5  0x00007fa924aab617 in malloc_printerr (
    str=str@entry=0x7fa924bbe240 "free(): invalid next size (fast)")
    at malloc.c:5515
#6  0x00007fa924aacf23 in _int_free (av=0x7fa924bfac80 <main_arena>,
    p=0x55966176fa20, have_lock=0) at malloc.c:4389
#7  0x00007fa924aaf955 in __GI___libc_free (mem=<optimized out>)
    at malloc.c:3258
#8  0x00005596615bfd24 in array_dispose_element (ae=0x559661770f70)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/array.c:545
#9  restore_funcarray_state (fa=0x559661923f00)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:4887
#10 0x000055966166d119 in unwind_frame_run_internal.constprop.0 (
    tag=0x55966168705e "function_calling", ignore=0x0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/unwind_prot.c:325
#11 0x00005596615c0b9f in without_interrupts (arg2=0x0,
    arg1=0x55966168705e "function_calling", function=<optimized out>)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/unwind_prot.c:117
#12 run_unwind_frame (tag=0x55966168705e "function_calling")
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/unwind_prot.c:143
#13 execute_function (var=<optimized out>, words=0x559661911de0,
    flags=<optimized out>, fds_to_close=0x55966191baa0, async=0, subshell=0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:5133
#14 0x00005596615b739a in execute_builtin_or_function (flags=8,
    fds_to_close=0x55966191baa0, redirects=<optimized out>,
    var=0x5596617ca160, builtin=0x0, words=0x559661911de0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:5355
--Type <RET> for more, q to quit, c to continue without paging--
#15 execute_simple_command (simple_command=<optimized out>, pipe_in=-1,
    pipe_out=-1, async=0, fds_to_close=<optimized out>)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:4609
#16 0x00005596615b85ba in execute_command_internal (command=0x5596619579f0,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966191baa0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:857
#17 0x00005596615ba758 in execute_command (command=0x5596619579f0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#18 0x00005596615b9300 in execute_connection (fds_to_close=0x559661943a80,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x559661887eb0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2789
#19 execute_command_internal (command=0x559661887eb0,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x559661943a80)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#20 0x00005596615b93db in execute_connection (fds_to_close=0x559661943a80,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x55966191d640)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2727
#21 execute_command_internal (command=0x55966191d640,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x559661943a80)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#22 0x00005596615ba758 in execute_command (command=0x55966191d640)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#23 0x00005596615b939e in execute_connection (fds_to_close=0x559661955380,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x559661946bc0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#24 execute_command_internal (command=0x559661946bc0,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x559661955380)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#25 0x00005596615ba758 in execute_command (command=0x559661946bc0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#26 0x00005596615b939e in execute_connection (fds_to_close=0x55966190e8e0,
--Type <RET> for more, q to quit, c to continue without paging--
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x55966193ba80)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#27 execute_command_internal (command=0x55966193ba80,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966190e8e0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#28 0x00005596615ba758 in execute_command (command=0x55966193ba80)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#29 0x00005596615b939e in execute_connection (fds_to_close=0x559661905150,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x5596619212b0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#30 execute_command_internal (command=0x5596619212b0,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x559661905150)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#31 0x00005596615ba758 in execute_command (command=0x5596619212b0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#32 0x00005596615b939e in execute_connection (fds_to_close=0x55966190aed0,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x55966176e910)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#33 execute_command_internal (command=0x55966176e910,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966190aed0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#34 0x00005596615ba758 in execute_command (command=0x55966176e910)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#35 0x00005596615b939e in execute_connection (fds_to_close=0x559661772510,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x5596619276f0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#36 execute_command_internal (command=0x5596619276f0,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x559661772510)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#37 0x00005596615ba758 in execute_command (command=0x5596619276f0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
--Type <RET> for more, q to quit, c to continue without paging--
#38 0x00005596615b939e in execute_connection (fds_to_close=0x55966178c3a0,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x55966193ed90)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#39 execute_command_internal (command=0x55966193ed90,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966178c3a0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#40 0x00005596615ba758 in execute_command (command=0x55966193ed90)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#41 0x00005596615b939e in execute_connection (fds_to_close=0x559661942bd0,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x559661965a30)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#42 execute_command_internal (command=0x559661965a30,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x559661942bd0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#43 0x00005596615ba758 in execute_command (command=0x559661965a30)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#44 0x00005596615b939e in execute_connection (fds_to_close=0x55966182b500,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x559661882280)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#45 execute_command_internal (command=0x559661882280,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966182b500)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#46 0x00005596615ba758 in execute_command (command=0x559661882280)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:399
#47 0x00005596615b939e in execute_connection (fds_to_close=0x55966188cac0,
    pipe_out=-1, pipe_in=-1, asynchronous=0, command=0x559661915470)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:2718
#48 execute_command_internal (command=0x559661915470,
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966188cac0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1032
#49 0x00005596615b8193 in execute_command_internal (command=0x559661911c10,
--Type <RET> for more, q to quit, c to continue without paging--
    asynchronous=<optimized out>, pipe_in=-1, pipe_out=-1,
    fds_to_close=0x55966188cac0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:1024
#50 0x00005596615c0da0 in execute_function (var=var@entry=0x5596618058a0,
    words=words@entry=0x5596619144a0, flags=flags@entry=0,
    fds_to_close=fds_to_close@entry=0x55966188cac0, async=async@entry=0,
    subshell=subshell@entry=0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:5110
#51 0x00005596615c160d in execute_shell_function (var=0x5596618058a0,
    words=0x5596619144a0)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/execute_cmd.c:5169
#52 0x0000559661610d93 in gen_shell_function_matches (cs=0x5596619269c0,
    cs=0x5596619269c0, nw=<optimized out>, foundp=<synthetic pointer>,
    cw=<optimized out>, lwords=0x55966193b420, ind=<optimized out>,
    line=0x559661882120 "cd cor", text=0x559661905cf0 "cor",
    cmd=0x559661961180 "cd")
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/pcomplete.c:1155
#53 gen_compspec_completions (cs=cs@entry=0x5596619269c0,
    cmd=cmd@entry=0x559661961180 "cd", word=word@entry=0x559661905cf0 "cor",
    start=start@entry=0, end=end@entry=6, foundp=foundp@entry=0x7ffd0d0f724c)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/pcomplete.c:1422
#54 0x0000559661611a2d in gen_progcomp_completions (
    ocmd=ocmd@entry=0x559661961180 "cd", cmd=cmd@entry=0x559661961180 "cd",
    word=word@entry=0x559661905cf0 "cor", start=start@entry=0,
    end=end@entry=6, foundp=foundp@entry=0x7ffd0d0f724c,
    retryp=0x7ffd0d0f7248, lastcs=0x7ffd0d0f7250)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/pcomplete.c:1594
#55 0x0000559661611b5e in programmable_completions (cmd=0x559661961180 "cd",
    word=0x559661905cf0 "cor", start=0, end=<optimized out>,
    foundp=0x7ffd0d0f72e4)
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/pcomplete.c:1649
#56 0x00005596616052d9 in attempt_shell_completion (text=0x559661905cf0 "cor",
    start=3, end=6) at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/bashline.c:1665
#57 0x000055966164692c in gen_completion_matches (
    text=text@entry=0x559661905cf0 "cor", start=start@entry=3,
--Type <RET> for more, q to quit, c to continue without paging--
    end=end@entry=6,
    our_func=0x559661647480 <rl_filename_completion_function>,
    found_quote=<optimized out>, quote_char=<optimized out>)
    at lib/readline/complete.c:1222
#58 0x0000559661648912 in rl_complete_internal (what_to_do=9)
    at lib/readline/complete.c:2031
#59 0x000055966163cd3f in _rl_dispatch_subseq (key=<optimized out>,
    map=<optimized out>, got_subseq=<optimized out>)
    at lib/readline/readline.c:934
#60 0x000055966163d49a in _rl_dispatch (map=<optimized out>,
    key=<optimized out>) at lib/readline/readline.c:880
#61 readline_internal_char () at lib/readline/readline.c:692
#62 0x000055966163d76d in readline_internal_charloop ()
    at lib/readline/readline.c:741
#63 readline_internal () at lib/readline/readline.c:753
#64 readline (prompt=<optimized out>) at lib/readline/readline.c:432
#65 0x000055966159fd9f in yy_readline_get () at ./parse.y:1488
#66 0x00005596615a2e09 in yy_getc () at ./parse.y:1422
#67 shell_getc (remove_quoted_newline=1) at ./parse.y:2358
#68 0x00005596615a4b9a in read_token (command=<optimized out>)
    at ./parse.y:3290
#69 0x00005596615a871a in read_token (command=0) at ./parse.y:3254
#70 yylex () at ./parse.y:2797
#71 yyparse () at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/y.tab.c:1824
#72 0x00005596615abb9d in parse_command ()
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/eval.c:348
#73 0x00005596615abd6d in read_command ()
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/eval.c:392
#74 0x00005596615ac035 in reader_loop ()
    at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/eval.c:138
#75 0x000055966159d95e in main (argc=1, argv=0x7ffd0d0f8718,
    env=0x7ffd0d0f8728) at /usr/src/debug/bash-5.1.8-6.el9_1.x86_64/shell.c:821