OpenEuphoria

Re: Strange machine-level exception

• Posted by Derek Parnell <ddparnell at bigpond.com> Jun 17, 2007
• 526 views

Juergen Luethje wrote:
> 
> Hi all,
> 
> I've changed my private create_set() function a little, in order to take
> advantage of find_from(). Then I encountered a strange machine-level
> exception.
> 
> I've tested it on Windows XP Pro and Euphoria 3.1. The following code runs
> fine when interpreted by EX.exe, EXW.exe and EXWC.exe. When I uncomment
> the denoted line near the end, the program still runs fine with EX.exe but
> crashes reliably with EXW.exe and EXWC.exe. Renaming "safe.e" to "machine.e"
> and including it in the program didn't provide any hints.


> Can someone please confirm the problem?

Yes I can confirm it. There does appear to be a problem with find_from(). I
tried to get around it by not assigning back to the 's' sequence and that worked
for small sequence size but it failed for large ones. If you don't use
find_from() it works ...

eg.

function create_set (sequence s)
   -- create a set (= remove duplicate entries)
   sequence t
   object x

   if length(s) < 2 then
      return s
   end if

   t = {s[1]}
   for i = 2 to length(s) - 1 do
      x = s[i]
      if find(x, t) = 0 then
         t = append(t,x)
      end if
   end for
   return t
end function


-- 
Derek Parnell
Melbourne, Australia
Skype name: derek.j.parnell