Hi,

I have a problem with a little piece of code but
I attached the whole thing since i cannot reproduce
the "bug" in reduced environement with the same values.
I'm using the num library for doing exact maths.

here extracted from the function line 280
see the code attached, i commented the section with details
try
   let (graph_x, graph_y) = scale_point (!index, yval) in
             fill_circle graph_x graph_y 1;
with Failure _ -> exit 0;

If I try to catch the exception like that the process
wont even go beyond the "try with" block
I tested printing something instead of trying to exit
but nothing is writed to the console and the cpu is at 100%
All I can do is to kill the process.
But if I don't try catch the Failure all works fine.
I don't think doing unsafe things since there is no C code,
no black magic, only some maths.

To test, just launch the attached file with the points file:
    ocamlc nums.cma graphics.cma proj309.ml -o proj309
    ./proj309 points.txt

It should draw a graph from the points in the file
but in my computer it is ending into an infinite-loop
if I uncomment the "try .. with" bloc line 303 and 313.
I don't understand since there is no raised exception
when the bloc is commented and the code works
great without problems without the "try .. with"

Any clues on where is the mess ?

Thanks,
  Michel

PS: I'm using ocaml 3.08.2
PS2: I'm think this language is really very good
        and I only wish It could even become better
        congratulations :)