Re: [Nano-devel] misbehavior while creating a new file (was: 2.2.2 pre-release)

[Mike Frysinger]

On Wednesday 13 January 2010 11:25:54 Mike Frysinger wrote:
> On Wednesday 13 January 2010 11:03:46 Chris Allegretta wrote:
> > Interesting, that may be related to the fix in r4467.  Having a little
> > trouble reproducing right off the bat, is it easily reproducible with
> > a certain set of steps?
> 
> nano file-that-doesnt-exist
> ctrl+o (to save file)
> ctrl+o (to save file)
> 
> ive only had it crash once so far, but i get the incorrect modified notice
> every time

ok, here's how to make it crash every time (needs multibuffer):
rm -f doesnt-exist
> exists
nano doesnt-exist exists
ctrl+o # save the new "doesnt-exist" file
ctrl+x # try to close the new "doesnt-exist" file and switch to "exists"
segfault

here's a backtrace with -O0
(gdb) bt f
#0  0x00007f34425ae1b5 in *__GI_raise (sig=<value optimized out>) at 
../nptl/sysdeps/unix/sysv/linux/raise.c:64
        pid = <value optimized out>
        selftid = <value optimized out>
#1  0x00007f34425af5e0 in *__GI_abort () at abort.c:92
        act = {
          __sigaction_handler = {
            sa_handler = 0x7fffcfdd48c0,
            sa_sigaction = 0x7fffcfdd48c0
          },
          sa_mask = {
            __val = {0x7fffcfdd4980, 0x7fffcfdd7205, 0xa, 0x7f344269b18d, 0x3, 
0x7fffcfdd498a, 0x6, 0x7f344269b191, 0x2, 0x7fffcfdd497e, 0x2, 0x7f3442698f48, 
0x1, 0x7f344269b18d, 0x3, 0x7fffcfdd4984}
          },
          sa_flags = 0xc,
          sa_restorer = 0x7f344269b191
        }
        sigs = {
          __val = {0x20, 0x0 <repeats 15 times>}
        }
#2  0x00007f34425e8e77 in __libc_message (do_abort=<value optimized out>, 
fmt=<value optimized out>) at ../sysdeps/unix/sysv/linux/libc_fatal.c:186
        ap = {{
            gp_offset = 0x28,
            fp_offset = 0x30,
            overflow_arg_area = 0x7fffcfdd5300,
            reg_save_area = 0x7fffcfdd5210
          }}
        ap_copy = {{
            gp_offset = 0x10,
            fp_offset = 0x30,
            overflow_arg_area = 0x7fffcfdd5300,
            reg_save_area = 0x7fffcfdd5210
          }}
        fd = 0x3
        on_2 = <value optimized out>
        list = <value optimized out>
        nlist = 0x0
        cp = <value optimized out>
        written = 0x0
#3  0x00007f34425ee406 in malloc_printerr (action=0x3, str=0x7f344269cb18 
"munmap_chunk(): invalid pointer", ptr=<value optimized out>) at malloc.c:6264
        buf = "00007fffcfdd5100"
        cp = 0x7f34426932c0 "0123456789abcdefghijklmnopqrstuvwxyz"
#4  0x0000000000413192 in delete_opennode (fileptr=0x101d250) at nano.c:561
No locals.
#5  0x0000000000413148 in unlink_opennode (fileptr=0x101d250) at nano.c:549
No locals.
#6  0x0000000000408126 in close_buffer () at files.c:286
No locals.
#7  0x0000000000413e42 in do_exit () at nano.c:1054
        i = 0x0
#8  0x000000000040f127 in iso_me_harder_funcmap (func=0x12) at global.c:1242
No locals.
#9  0x00000000004149eb in do_input (meta_key=0x7fffcfdd545f, 
func_key=0x7fffcfdd545e, s_or_t=0x7fffcfdd545d, ran_func=0x7fffcfdd545c, 
finished=0x7fffcfdd545b, allow_funcs=0x1) at nano.c:1626
        f = 0x100a0b0
        input = 0x18
        kbinput = 0x0
        kbinput_len = 0x0
        cut_copy = 0x0
        s = 0x100c6d0
        have_shortcut = 0x1
#10 0x00000000004161d5 in main (argc=0x3, argv=0x7fffcfdd5ab8) at nano.c:2663
        func_key = 0x0
        s_or_t = 0x0
        ran_func = 0x1
        finished = 0x0
        meta_key = 0x0
        optchr = 0xffffffff
        startline = 0x1
        startcol = 0x1
        fill_used = 0x0
        old_multibuffer = 0x1
        long_options = {{
            name = 0x42c490 "help",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x68
          }, {
            name = 0x42c495 "boldtext",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x44
          }, {
            name = 0x42c49e "multibuffer",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x46
          }, {
            name = 0x42c4aa "ignorercfiles",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x49
          }, {
            name = 0x42c4b8 "rebindkeypad",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x4b
          }, {
            name = 0x42c4c5 "nonewlines",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x4c
          }, {
            name = 0x42c4d0 "morespace",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x4f
          }, {
            name = 0x42c4da "restricted",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x52
          }, {
            name = 0x42c4e5 "tabsize",
            has_arg = 0x1,
            flag = 0x0,
            val = 0x54
          }, {
            name = 0x42c4ed "version",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x56
          }, {
            name = 0x42c4f5 "syntax",
            has_arg = 0x1,
            flag = 0x0,
            val = 0x59
          }, {
            name = 0x42c4fc "const",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x63
          }, {
            name = 0x42c502 "rebinddelete",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x64
          }, {
            name = 0x42c50f "nofollow",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x6c
          }, {
            name = 0x42c518 "mouse",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x6d
          }, {
            name = 0x42c51e "operatingdir",
            has_arg = 0x1,
            flag = 0x0,
            val = 0x6f
          }, {
            name = 0x42c52b "preserve",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x70
          }, {
            name = 0x42c534 "quiet",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x71
          }, {
            name = 0x42c53a "fill",
            has_arg = 0x1,
            flag = 0x0,
            val = 0x72
          }, {
            name = 0x42c53f "speller",
            has_arg = 0x1,
            flag = 0x0,
            val = 0x73
          }, {
            name = 0x42c547 "tempfile",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x74
          }, {
            name = 0x42c550 "view",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x76
          }, {
            name = 0x42c555 "nowrap",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x77
          }, {
            name = 0x42c55c "nohelp",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x78
          }, {
            name = 0x42c563 "suspend",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x7a
          }, {
            name = 0x42c56b "smarthome",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x41
          }, {
            name = 0x42c575 "backup",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x42
          }, {
            name = 0x42c57c "backupdir",
            has_arg = 0x1,
            flag = 0x0,
            val = 0x43
          }, {
            name = 0x42c586 "tabstospaces",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x45
          }, {
            name = 0x42c593 "historylog",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x48
          }, {
            name = 0x42c59e "noconvert",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x4e
          }, {
            name = 0x42c5a8 "smooth",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x53
          }, {
            name = 0x42c5af "quickblank",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x55
          }, {
            name = 0x42c5ba "undo",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x75
          }, {
            name = 0x42c5bf "wordbounds",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x57
          }, {
            name = 0x42c5ca "autoindent",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x69
          }, {
            name = 0x42c5d5 "cut",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x6b
          }, {
            name = 0x42c5d9 "softwrap",
            has_arg = 0x0,
            flag = 0x0,
            val = 0x24
          }, {
            name = 0x0,
            has_arg = 0x0,
            flag = 0x0,
            val = 0x0
          }}
-mike

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