From: George Foot <mert0407 AT sable DOT ox DOT ac DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: What dose this mean?? SIGSEGV....
Date: 16 Feb 1998 04:48:53 GMT
Organization: Oxford University, England
Lines: 37
Message-ID: <6c8gfl$2pk$1@news.ox.ac.uk>
References: <34E4AB9E DOT 59EB4997 AT bigfoot DOT com>
NNTP-Posting-Host: sable.ox.ac.uk
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

On Fri, 13 Feb 1998 15:22:55 -0500 in comp.os.msdos.djgpp s yoshida
<syoshida AT bigfoot DOT com> wrote:

: I'm having trouble with with my program using Allegro and Grabber...
: When I added 1 RLE Sprite into my DAT file, which was working fine b4 i
: added this 1 file and saved....
: I didnt do anything to my code, but when i run the same program it now
: says the following

Did you recompile the program, or just rerun it?  If you add an object
to a datafile, it will change the order of objects in the file.  If
you reference them in your program by number (e.g. through the macros
in the header file that the grabber creates) then your program will
try to use the wrong datafile objects.  If you're using the header
file, you must recompile to let the changes the grabber made when you
added the sprite take effect.

: can ne1 tell me which part of my program is doing something wrong?  or
: those numbers above dont mean anything?

The numbers do mean something -- they show where your program got to
when it crashed.  You should run symify while the crash information is
still on the screen.  Provided you didn't link with the `-s' switch,
this will add the function names to the call frame traceback, which
will help you to debug the problem.  If you compiled your source files
with the `-g' switch then you will get additional debugging
information (filenames and line numbers).

Under some circumstances though (yours looks like one of them) the
call frame traceback will be incorrect or incomplete.  This occurs if
for example the stack gets corrupted.  To debug this you need more
sophisticated tools, such as gdb or RHGDB.

-- 
george DOT foot AT merton DOT oxford DOT ac DOT uk

ma tavla fo la lojban