[31] in bug-owl
apparent memory corruption of fmtext?
daemon@ATHENA.MIT.EDU (Erik Nygren)
Wed Jun 26 01:03:19 2002
To: bug-owl@mit.edu
Date: Wed, 26 Jun 2002 01:03:05 -0400
From: Erik Nygren <nygren@MIT.EDU>
Message-Id: <E17N4xO-0007Xa-00@gaia.bay13.org>
When scrolling around in a help message:
(gdb) where
#0 0x4017621f in ?? ()
#1 0x40176074 in ?? ()
#2 0x0805b235 in owl_malloc (size=5) at util.c:301
#3 0x08058a9a in owl_fmtext_init_null (f=0xbfffe16c) at fmtext.c:8
#4 0x080596a1 in owl_fmtext_truncate_cols (in=0xbfffe17c, acol=0, bcol=96, out=0xbfffe16c)
at fmtext.c:426
#5 0x08062001 in owl_viewwin_redisplay (v=0x8075120, update=1) at viewwin.c:56
#6 0x0805d58d in owl_keys_popless_postalways (j=338) at keys.c:281
#7 0x08066a72 in owl_keyhandler_process (kh=0x80733dc, j=338) at keymap.c:243
#8 0x080532b3 in main (argc=3, argv=0xbffffbf4, env=0xbffffc04) at owl.c:355
It's possible that this is something I introduced, though, as I haven't
been able to reliably reproduce it.
At stack level 4:
(gdb) print *v
$5 = {fmtext = {textlen = 970,
textbuff = 0x80c29d8 "OWL HELP\n\nNAME\n\n show - show information\n\nSYNOPSIS\n show variables\n show variable <variable>\n show filters\n show filter <filter>\n show keymaps\n show keymap <keymap>\n show commands\n s"..., fmbuff = 0x80c2db0 '\001' <repeats 16 times>,
colorbuff = 0x80c3188 '\b' <repeats 200 times>...}, textlines = 46, topline = 32, rightshift = 0,
winlines = 15, wincols = 97, curswin = 0x80c1e14}
My guess is that owl_fmtext_truncate_lines is overwriting something
or double-freeing which is then causing owl_fmtext_truncate_cols to bail.
Erik
