Re: Swig + Python + C++ + overloading + None = SEGV.

Thanks,

now it doesn't crash via seg fault, but by using a python error message,

Marcelo



Timo Korvola wrote:

> Hello,
>
> I just noticed that if you pass None from Python to an overloaded C++
> function as the argument overloading resolution is based on, you will
> probably crash the interpreter.  The reason is that it uses
> SWIG_ConvertPtr for typechecking and that will always succeed on None,
> converting it to a null pointer, which usually gets dereferenced later.
>
> Example:
> ----8<----
> %module oltest
>
> %{
> #include <iostream>
> using namespace std;
> %}
>
> %inline %{
> struct foo {
>  int x;
> };
> struct bar {
>  float y;
> };
>
> static void
> foobar( foo x) {
>  cout << "foo " << x.x << endl;
> }
>
> static void
> foobar( bar x) {
>  cout << "bar " << x.y << endl;
> }
> %}
> ---->8----
> Compile and import to Python, then try oltest.foobar( None).
>
>  

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