[wingide-users] Difference between Debug I/O and normal execution
support at wingware.com
Wed Nov 4 11:42:45 MST 2009
Krishna Sandeep Reddy wrote:
> I am using a package called pyswip which is bridge between python and
> swi-prolog. It has some issues with 64-bit machines and give
> segmentation fault with some stuff (especially int).
> When I run a program that uses pyswip from wing it gives segmentation
> fault. But when I run in debug mode from wing it works fine and shows
> correct output. What is the difference between Debug I/O and normal
> run wrt 64-bit processing? Or is it the way Debug I/O handles the
That's a difficult question to answer as it could be just about anything.
You could try to see if it crashes if you enable the Debugger / I/O / Use
External Console preference. That would at least rule in/out whether I/O
has anything to do with it. You could also try whether the Debugger / I/O /
Debug I/O Encoding preference has any effect.
It could also be a thread invocation order issue, if you are using threads.
In general, it's not entirely uncommon that debuggers can mask problems
like this. Despite trying very hard to make a minimal impact on runtime
environment, there are many subtle differences.
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