Re: [Lynx-dev] Re: lynx: double free or corruption (fasttop)

[Thomas Dickey]

On Fri, 29 Oct 2010, Fr?d?ric L. W. Meunier wrote:

> On Fri, 29 Oct 2010, Fr?d?ric L. W. Meunier wrote:
>
> > Is this supposed to be a bug in lynx or glibc ? I get it randomly while 
> > removing a file with 'r'.
> >
> > How would one track it down ? gdb bt didn't return anything.
>
> Sometimes it exits immediately, printing what I send earlier and producing a 
> core file that doesn't return anything useful.
>
> But it can also just hang. I don't know if this gdb attach is useful.
>
> #0  0xb7803424 in __kernel_vsyscall ()
> #1  0xb77492f1 in __lll_lock_wait_private () from /lib/libc.so.6
> #2  0xb76d0e4b in _L_lock_9103 () from /lib/libc.so.6
> #3  0xb76cfdc9 in free () from /lib/libc.so.6
> #4  0x0808c1da in LYRemoveTemp (
>    name=0x9ba4598 "/home/fredlwm/tmp/L29757-4739TMP.html.gz")
>    at /usr/local/src/links/lynx/src/LYUtils.c:6375
> #5  0x0808c2e3 in LYCleanupTemp ()
>    at /usr/local/src/links/lynx/src/LYUtils.c:6391
> #6  0x0804b5db in cleanup_files ()
>    at /usr/local/src/links/lynx/src/LYClean.c:153
> #7  0x0804b67f in cleanup () at /usr/local/src/links/lynx/src/LYClean.c:210
> #8  0x0804b78d in cleanup_sig (sig=0)
>    at /usr/local/src/links/lynx/src/LYClean.c:117
> #9  0x0807753a in FatalProblem (sig=11)
>    at /usr/local/src/links/lynx/src/LYMain.c:4369
> #10 <signal handler called>

well, it's dead at this level, and trying to cleanup in LYClean.c
So I'd ignore LYClean and assume it's something wrong in LYStyle.c, etc.

> #11 0xb76c9f0b in malloc_consolidate () from /lib/libc.so.6
> #12 0xb76cd2a1 in _int_malloc () from /lib/libc.so.6
> #13 0xb76d033b in calloc () from /lib/libc.so.6
> #14 0x080d4104 in RefCachedStyle (y=22, x=<value optimized out>)
>    at /usr/local/src/links/lynx/src/LYStyle.c:745
> #15 0x080d4121 in SetCachedStyle (y=22, x=0, value=505)
>    at /usr/local/src/links/lynx/src/LYStyle.c:774
> #16 0x08086ca0 in curses_w_style (win=0x928c360, style=505, dir=1)
>    at /usr/local/src/links/lynx/src/LYCurses.c:522
> #17 0x08086fd1 in curses_style (style=505, dir=1)
>    at /usr/local/src/links/lynx/src/LYCurses.c:566
> #18 0x0808d740 in statusline (text=0x9d25c10 "Getting file://localhost/tmp")
>    at /usr/local/src/links/lynx/src/LYUtils.c:1531
> #19 0x0805b72f in user_message (message=0x812ea6b "Getting %s",
>    argument=<value optimized out>)
>    at /usr/local/src/links/lynx/src/GridText.c:8673
> #20 0x08071aec in getfile (doc=0x818e280, target=0xbfff44c0)
>    at /usr/local/src/links/lynx/src/LYGetFile.c:796
> #21 0x0807c0ad in mainloop ()
>    at /usr/local/src/links/lynx/src/LYMainLoop.c:5571
> #22 0x0807728f in main (argc=1, argv=0xbfff4854)
>    at /usr/local/src/links/lynx/src/LYMain.c:2167

--
Thomas E. Dickey
http://invisible-island.net
ftp://invisible-island.net