[C++-sig] boost.python crush

[Ralf W. Grosse-Kunstleve]

Is this under Windows? If yes you have to be very careful how you link. Certain
combinations of DLL's lead to obscure failures like yours. There was a thread
about this recently; should be in the archieve:

http://mail.python.org/pipermail/c++-sig/

Look for "windows", "dll", "debug".
If you are using a different platform post the exact details.
Ralf

--- Max Khesin <MKhesin at liquidnet.com> wrote:
> I have the following sample class exposed via boost.python:
> 
> class String
> {
> public:
>     String(const std::string& v):m_val(v){}
>     bool lessThan(const std::string& other)                  const{return
> this->m_val<other;}
>     bool greaterThan(const std::string& other)               const{return
> this->m_val>other;}
>     bool equals(const std::string& other)                    const{return
> this->m_val==other;}
>     bool regexMatch(const std::string& other)                const{return
> this->m_val==other;}
>     bool withinDistance(const std::string& other, int dist)  const{return
> distance(this->m_val, other)<=dist;}       
> private:
>     std::string m_val;
> };
> 
> 
> BOOST_PYTHON_MODULE(test)
> {
>     class_<String>("String", init<const std::string&>())
>         .def("lessThan",        &String::lessThan)
>         .def("greaterThan",     &String::greaterThan)
>         .def("equals",          &String::equals)
>         .def("regexMatch",      &String::regexMatch)
>         .def("withinDistance",  &String::withinDistance)
>         ;
> }
> 
> I am calling this from python:
> 
> >> import test
> >> s = test.String('hallo')
> >> s.lessThen('hello')   #### <<< CRUSH
> 
> the debugger seems to point to an access violation in std::string dtor. I
> palyed around with making the argument a plain std::string (instead of const
> std::string&) and const char* - both of those crush, albeit in a different
> place (also dtors, from the looks of it)
> 
> Any idea?
> 
> thanks,
> 
> max
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