#0  0x00007fb32f9ed428 in __GI_raise (sig=sig@entry=6) at 
../sysdeps/unix/sysv/linux/raise.c:54
        resultvar = 0
        pid = 3997
        selftid = 3997
#1  0x00007fb32f9ef02a in __GI_abort () at abort.c:89
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x2e33322e322d646c, 
sa_sigaction = 0x2e33322e322d646c}, sa_mask = {__val = {3689400710896185203, 
3256155515023405872, 3473454209073047095, 3276212736508309552, 
3474019345111195760, 3544397105330139184, 3689067352599901472, 
2314885530818453536, 2314885530818453536, 7091318037929795616, 
3257288213055174703, 7955377262162766188, 3615882721364815733, 
7090415181300444723, 3472328296294789939, 3473176235347488048}}, sa_flags = 
808529972, sa_restorer = 0x4d}
        sigs = {__val = {32, 0 <repeats 15 times>}}
#2  0x00007fb32fa2f7ea in __libc_message (do_abort=do_abort@entry=2, 
fmt=fmt@entry=0x7fb32fb482e0 "*** 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  0x00007fb32fa3bae8 in malloc_printerr (ar_ptr=0x0, ptr=<optimized out>, 
str=0x7fb32fb48308 "munmap_chunk(): invalid pointer", action=<optimized out>) 
at malloc.c:5004
        buf = "0000000001520410"
        cp = <optimized out>
        ar_ptr = 0x0
        ptr = <optimized out>
        str = 0x7fb32fb48308 "munmap_chunk(): invalid pointer"
        action = <optimized out>
#4  munmap_chunk (p=<optimized out>) at malloc.c:2840
        size = <optimized out>
        block = <optimized out>
        total_size = <optimized out>
#5  __GI___libc_free (mem=<optimized out>) at malloc.c:2961
        ar_ptr = <optimized out>
        p = <optimized out>
        hook = <optimized out>
#6  0x00007fb32ffbdd83 in _nc_freewin (win=0x15415b0) at 
/build/ncurses-pKZ1BN/ncurses-6.0+20160213/ncurses/base/lib_newwin.c:118
        p = 0x15415a0
        q = <optimized out>
        i = <optimized out>
        result = -1
#7  0x00007fb32ffb5f90 in delwin (win=<optimized out>) at 
/build/ncurses-pKZ1BN/ncurses-6.0+20160213/ncurses/base/lib_delwin.c:88
        result = -1
#8  0x0000000000412f87 in window_init () at ../../src/nano.c:726
No locals.
#9  0x0000000000414189 in regenerate_screen () at ../../src/nano.c:1378
        tty = <optimized out>
        result = 0
        win = {ws_row = 24, ws_col = 81, ws_xpixel = 0, ws_ypixel = 0}
#10 0x00000000004201b9 in get_key_buffer (win=0x1520d20) at 
../../src/winio.c:136
        input = -1
        errcount = 0
#11 0x00000000004203d2 in get_key_buffer (win=0x1520d20) at 
../../src/winio.c:300
No locals.
#12 get_input (win=win@entry=0x1520d20, input_len=input_len@entry=1) at 
../../src/winio.c:262
        input = <optimized out>
#13 0x00000000004224fd in parse_kbinput (win=win@entry=0x1520d20) at 
../../src/winio.c:345
        escapes = 0
        byte_digits = 0
        kbinput = <optimized out>
        retval = -1
#14 0x0000000000422ab8 in get_kbinput (win=0x1520d20) at ../../src/winio.c:316
        kbinput = <optimized out>
#15 0x000000000041619d in do_yesno_prompt (all=all@entry=false, 
msg=msg@entry=0x1520380 "File 
/etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla is 
being edited (by root with nano 2.5.3, PID 3956); continue?") at 
../../src/prompt.c:876
        kbinput = 32764
        func = <optimized out>
        mouse_x = 3956
        mouse_y = 0
        response = -2
        width = 16
        yesstr = 0x429778 "Yy"
        nostr = 0x42977b "Nn"
        allstr = 0x42977e "Aa"
        oldmenu = 0
#16 0x0000000000408b4c in do_lockfile (filename=filename@entry=0x7ffcc6f0d7c1 
"/etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla") at 
../../src/files.c:373
        readtot = <optimized out>
        promptstr = 0x1520380 "File 
/etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla is 
being edited (by root with nano 2.5.3, PID 3956); continue?"
        readamt = <optimized out>
        lockbuf = 0x1582390 "/dev/pts/1"
        ans = <optimized out>
        namecopy1 = <optimized out>
        namecopy2 = <optimized out>
        locknamesize = <optimized out>
        lockfilename = 0x1520440 
"/etc/polkit-1/localauthority/50-local.d/.com.ubuntu.enable-hibernate.pkla.swp"
        lockprog = "nano 2.5.3"
        lockuser = "root", '\000' <repeats 12 times>
        fileinfo = {st_dev = 64513, st_ino = 789642, st_nlink = 1, st_mode = 
33188, st_uid = 0, st_gid = 0, __pad0 = 0, st_rdev = 0, st_size = 1024, 
st_blksize = 4096, st_blocks = 8, st_atim = {tv_sec = 1477472655, tv_nsec = 
339666299}, st_mtim = {tv_sec = 1477472655, tv_nsec = 339666299}, st_ctim = 
{tv_sec = 1477472655, tv_nsec = 339666299}, __glibc_reserved = {0, 0, 0}}
        lockpid = 3956
        retval = -1
#17 0x000000000040ccf1 in open_buffer (filename=0x7ffcc6f0d7c1 
"/etc/polkit-1/localauthority/50-local.d/com.ubuntu.enable-hibernate.pkla", 
undoable=undoable@entry=false) at ../../src/files.c:457
        lockstatus = <optimized out>
        quiet = false
        new_buffer = true
        f = 0x3b
        rc = <optimized out>
#18 0x000000000040431c in main (argc=2, argv=0x7ffcc6f0bd28) 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}, {nam
 e = 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>

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https://bugs.launchpad.net/bugs/1650056

Title:
  /bin/nano:*** Error in `nano': munmap_chunk(): invalid pointer: ADDR
  ***

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