Comment 3 for bug 1572807

It's possible the stacktrace in the Error Tracker contains sensitive information, that's why access to it is restricted and it's not automatically added to the bug report here.

Here's the Stacktrace though:

#0 0x00007f38ce77e428 in __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:54
        resultvar = 0
        pid = 6528
        selftid = 6528
#1 0x00007f38ce78002a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x2020202020383939, sa_sigaction = 0x2020202020383939}, sa_mask = {__val = {2314885530818453536, 2314885530818453536, 7091318039310988591, 3257288213055174703, 7955377262162766188, 3420042391722602357, 8029123697353646951, 7017503717531088228, 4049692876519860323, 3472328519700276835, 3559641648514610989, 8606977229197436472, 3472328296226648109, 3475143045726351408, 3703708260188037168, 3472387704235647800}}, sa_flags = 1714892080, sa_restorer = 0x4f}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2 0x00007f38ce7c07ea in __libc_message (do_abort=do_abort@entry=2, fmt=fmt@entry=0x7f38ce8d92e0 "*** Error in `%s': %s: 0x%s ***\n") at ../sysdeps/posix/libc_fatal.c:175
        ap = <error reading variable ap (Attempt to dereference a generic pointer.)>
        fd = 4
        on_2 = <optimized out>
        list = <optimized out>
        nlist = <optimized out>
        cp = <optimized out>
        written = <optimized out>
#3 0x00007f38ce7c8e0a in malloc_printerr (ar_ptr=<optimized out>, ptr=<optimized out>, str=0x7f38ce8d9410 "double free or corruption (!prev)", action=3) at malloc.c:5004
        buf = "0000000000692690"
        cp = <optimized out>
        ar_ptr = <optimized out>
        str = 0x7f38ce8d9410 "double free or corruption (!prev)"
        action = 3
#4 _int_free (av=<optimized out>, p=<optimized out>, have_lock=0) at malloc.c:3865
        size = <optimized out>
        fb = <optimized out>
        nextchunk = <optimized out>
        nextsize = <optimized out>
        nextinuse = <optimized out>
        prevsize = <optimized out>
        bck = <optimized out>
        fwd = <optimized out>
        errstr = <optimized out>
        locked = <optimized out>
#5 0x00007f38ce7cc98c in __GI___libc_free (mem=mem@entry=0x692690) at malloc.c:2966
        ar_ptr = <optimized out>
        p = 0x692680
        hook = <optimized out>
#6 0x0000000000408b56 in do_lockfile (filename=filename@entry=0x7ffee0fb074d "**removed**/COMMIT_EDITMSG") at ../../src/files.c:374
        readtot = <optimized out>
        promptstr = 0x692690 "File **removed**/COMMIT_EDITMSG is being edited (by **removed** with nano 2.5.3, PID 12547); continue?"
        readamt = <optimized out>
        lockbuf = <optimized out>
        ans = 1
        namecopy1 = <optimized out>
        namecopy2 = <optimized out>
        locknamesize = <optimized out>
        lockfilename = 0x6999c0 "**removed**/.COMMIT_EDITMSG.swp"
        lockprog = "nano 2.5.3"
        lockuser = "khazizovroman\000\000\000"
        fileinfo = {st_dev = 2050, st_ino = 3733172, st_nlink = 1, st_mode = 33204, st_uid = 1000, st_gid = 1000, __pad0 = 0, st_rdev = 0, st_size = 1024, st_blksize = 4096, st_blocks = 8, st_atim = {tv_sec = 1472024225, tv_nsec = 596574479}, st_mtim = {tv_sec = 1468485463, tv_nsec = 186453909}, st_ctim = {tv_sec = 1468485463, tv_nsec = 186453909}, __glibc_reserved = {0, 0, 0}}
        lockpid = 12547
        retval = -1
#7 0x000000000040ccf1 in open_buffer (filename=0x7ffee0fb074d "**removed**/COMMIT_EDITMSG", undoable=undoable@entry=false) at ../../src/files.c:457
        lockstatus = <optimized out>
        quiet = false
        new_buffer = true
        f = 0x3b
        rc = <optimized out>
#8 0x000000000040431c in main (argc=2, argv=0x7ffee0fae2f8) at ../../src/nano.c:2599
        optchr = <optimized out>
        startline = 0
        startcol = 0
        fill_used = <optimized out>
        forced_wrapping = <optimized out>
        old_multibuffer = false
        long_options = {{name = 0x428236 "boldtext", has_arg = 0, flag = 0x0, val = 68}, {name = 0x42826d "multibuffer", has_arg = 0, flag = 0x0, val = 70}, {name = 0x4282c8 "ignorercfiles", has_arg = 0, flag = 0x0, val = 73}, {name = 0x4282d8 "rebindkeypad", has_arg = 0, flag = 0x0, val = 75}, {name = 0x4282e7 "nonewlines", has_arg = 0, flag = 0x0, val = 76}, {name = 0x42831e "morespace", has_arg = 0, flag = 0x0, val = 79}, {name = 0x42875d "quotestr", has_arg = 1, flag = 0x0, val = 81}, {name = 0x428371 "restricted", has_arg = 0, flag = 0x0, val = 82}, {name = 0x428766 "tabsize", has_arg = 1, flag = 0x0, val = 84}, {name = 0x4283cd "version", has_arg = 0, flag = 0x0, val = 86}, {name = 0x4298ca "syntax", has_arg = 1, flag = 0x0, val = 89}, {name = 0x4283fc "constantshow", has_arg = 0, flag = 0x0, val = 99}, {name = 0x42840e "rebinddelete", has_arg = 0, flag = 0x0, val = 100}, {name = 0x42843d "help", has_arg = 0, flag = 0x0, val = 104}, {name = 0x428474 "mouse", has_arg = 0, flag = 0x0, val = 109}, {name = 0x428487 "noread", has_arg = 0, flag = 0x0, val = 110}, {name = 0x42876e "operatingdir", has_arg = 1, flag = 0x0, val = 111}, {name = 0x4284c9 "preserve", has_arg = 0, flag = 0x0, val = 112}, {name = 0x4284d7 "quiet", has_arg = 0, flag = 0x0, val = 113}, {name = 0x42877b "fill", has_arg = 1, flag = 0x0, val = 114}, {name = 0x428526 "speller", has_arg = 1, flag = 0x0, val = 115}, {name = 0x428530 "tempfile", has_arg = 0, flag = 0x0, val = 116}, {name = 0x42855e "view", has_arg = 0, flag = 0x0, val = 118}, {name = 0x428583 "nowrap", has_arg = 0, flag = 0x0, val = 119}, {name = 0x4285ad "nohelp", has_arg = 0, flag = 0x0, val = 120}, {name = 0x4285cb "suspend", has_arg = 0, flag = 0x0, val = 122}, {name = 0x428206 "smarthome", has_arg = 0, flag = 0x0, val = 65}, {name = 0x428212 "backup", has_arg = 0, flag = 0x0, val = 66}, {name = 0x428780 "backupdir", has_arg = 1, flag = 0x0, val = 67}, {name = 0x42825e "tabstospaces", has_arg = 0, flag = 0x0, val = 69}, {name = 0x428296 "locking", has_arg = 0, flag = 0x0, val = 71}, {name = 0x4282a0 "historylog", has_arg = 0, flag = 0x0, val = 72}, {name = 0x4282f4 "noconvert", has_arg = 0, flag = 0x0, val = 78}, {name = 0x42878a "poslog", has_arg = 0, flag = 0x0, val = 80}, {name = 0x42832a "positionlog", has_arg = 0, flag = 0x0, val = 80}, {name = 0x42837e "smooth", has_arg = 0, flag = 0x0, val = 83}, {name = 0x4283c0 "quickblank", has_arg = 0, flag = 0x0, val = 85}, {name = 0x4283d7 "wordbounds", has_arg = 0, flag = 0x0, val = 87}, {name = 0x428447 "autoindent", has_arg = 0, flag = 0x0, val = 105}, {name = 0x42a482 "cut", has_arg = 0, flag = 0x0, val = 107}, {name = 0x42853e "unix", has_arg = 0, flag = 0x0, val = 117}, {name = 0x4285f2 "softwrap", has_arg = 0, flag = 0x0, val = 36}, {name = 0x0, has_arg = 0, flag = 0x0, val = 0}}
        keyvalue = <optimized out>