core dump

sbbs coredumped a short time ago core.sbbs!httpOutput.1416288

[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
--Type  for more, q to quit, c to continue without paging--c
Core was generated by `/sbbs/exec/sbbs d'.
Program terminated with signal SIGABRT, Aborted.
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
50      ../sysdeps/unix/sysv/linux/raise.c: No such file or directory.
[Current thread is 1 (Thread 0x7f661cbff700 (LWP 1624560))]
(gdb) bt
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
#1  0x00007f66dc984859 in __GI_abort () at abort.c:79
#2  0x00007f66dc9ef26e in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7f66dcb19298 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
#3  0x00007f66dc9f72fc in malloc_printerr (str=str@entry=0x7f66dcb1b600 "free(): invalid next size (fast)") at malloc.c:5347
#4  0x00007f66dc9f8bac in _int_free (av=0x7f6684000020, p=0x7f66844bc370, have_lock=have_lock@entry=0) at malloc.c:4249
#5  0x00007f66dc9fc88d in __GI___libc_free (mem=0x7f66844bc380) at malloc.c:3125
#6  tcache_thread_shutdown () at malloc.c:2964
#7  __malloc_arena_thread_freeres () at arena.c:951
#8  0x00007f66dca010a0 in __libc_thread_freeres () at thread-freeres.c:38
#9  0x00007f66dcb5c62f in start_thread (arg=) at pthread_create.c:491
#10 0x00007f66dca81133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
(gdb) bt full
#0  __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:50
        set = {__val = {24583, 0 }}
        pid = 
        tid = 
        ret = 
#1  0x00007f66dc984859 in __GI_abort () at abort.c:79
        save_stage = 1
        act = {__sigaction_handler = {sa_handler = 0x0, sa_sigaction = 0x0}, sa_mask = {__val = {0 }}, sa_flags = 0, sa_restorer = 0x0}
        sigs = {__val = {32, 0 }}
#2  0x00007f66dc9ef26e in __libc_message (action=action@entry=do_abort, fmt=fmt@entry=0x7f66dcb19298 "%s\n") at ../sysdeps/posix/libc_fatal.c:155
        ap = {{gp_offset = 24, fp_offset = 0, overflow_arg_area = 0x7f661cbfeda0, reg_save_area = 0x7f661cbfed30}}
        fd = 
        list = 
        nlist = 
        cp = 
#3  0x00007f66dc9f72fc in malloc_printerr (str=str@entry=0x7f66dcb1b600 "free(): invalid next size (fast)") at malloc.c:5347
No locals.
#4  0x00007f66dc9f8bac in _int_free (av=0x7f6684000020, p=0x7f66844bc370, have_lock=have_lock@entry=0) at malloc.c:4249
        fail = 
        idx = 
        old = 
        old2 = 
        size = 64
        fb = 
        nextchunk = 
        nextsize = 
        nextinuse = 
        prevsize = 
        bck = 
        fwd = 
        __PRETTY_FUNCTION__ = "_int_free"
#5  0x00007f66dc9fc88d in __GI___libc_free (mem=0x7f66844bc380) at malloc.c:3125
        ar_ptr = 
        p = 0x7f66844bc370
        hook = 
        ar_ptr = 
        p = 
        hook = 
        __x = 
#6  tcache_thread_shutdown () at malloc.c:2964
        e = 0x7f66844bc380
        i = 
        tcache_tmp = 0x7f6684012ad0
        i = 
        tcache_tmp = 
        e = 
--Type  for more, q to quit, c to continue without paging--c
#7  __malloc_arena_thread_freeres () at arena.c:951
        a = 
        __PRETTY_FUNCTION__ = "__malloc_arena_thread_freeres"
#8  0x00007f66dca010a0 in __libc_thread_freeres () at thread-freeres.c:38
No locals.
#9  0x00007f66dcb5c62f in start_thread (arg=) at pthread_create.c:491
        pd = 
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140076545734400, -5211240115315338387, 140076707116062, 140076707116063, 140076707116240, 140076545732416, 5287733689581376365, 5287311527882199917}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#10 0x00007f66dca81133 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
As always, let me know if you need me to provide anything else.