Re: exceptions and resource deallocation

Dear list,

I have problems understanding what exactly goes on during stack
unwinding and resource deallocation. Here is my sample code:

#include <memory>

class exception{};
class dummy{};

void f ( int a ) {
   if ( a == 7 )
     throw exception();
}

int main() {
   std::auto_ptr<dummy> temp( new dummy() );
   f ( 7 );

   return 1;
}
//sample code end

Now, i must admit, with great surprise, feeding this to valgrind, i
get back a byte leaked, besides a mysterious error that has to do with
the exception throwing itself: