[wingide-users] Difference between Debug I/O and normal execution
Krishna Sandeep Reddy
dksreddy at gmail.com
Thu Nov 5 08:12:33 MST 2009
This happens even if I use wingdbstub and call the program externally.
Looks like I can't use any of the wingide debugging facilities as it
completely changes the way the program runs. Are there any environment
settings related to 64-bit environment? I am using ctypes, may be I
will provide a simple example where this happens.
On Wed, Nov 4, 2009 at 6:42 PM, Wingware Support <support at wingware.com> wrote:
> 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.
> Stephan Deibel
> Wingware | Python IDE
> Advancing Software Development
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