[Bug c++/37720] New: Copy constructors do not work with std::vector as they should

["ivranos at freemail dot gr" <gcc-bugzilla at gcc dot gnu dot org>]

The following code:

#include <iostream>
#include <vector>
#include <cstddef>


struct SomeClass
{
    typedef std::vector<int> TypeVector;

    TypeVector vec;

    enum { VectorSize= 10 };

    public:

    SomeClass();
    SomeClass(const SomeClass &);
};



SomeClass::SomeClass():vec(VectorSize)
{
    using namespace std;


    for(TypeVector::size_type i= 0; i< vec.size(); ++i)
    {
        vec[i]= i;

        cout<<vec[i]<<"  ";
    }

    cout<<"\n\n";
}


SomeClass::SomeClass(const SomeClass &arg):vec(arg.vec) {}



int main()
{
    using namespace std;

    const size_t SIZE=10;

    typedef vector<SomeClass> Vector;

    cout<< "\nCreating vector with "<< SIZE<< " SomeClass objects..."<< endl;
    Vector vec(SIZE);

}


produces 10 ints instead of 100:

john@john-desktop:~/Projects/Other/anjuta1/src$ ./foobar_cpp 

Creating vector with 10 SomeClass objects...
0  1  2  3  4  5  6  7  8  9  

john@john-desktop:~/Projects/Other/anjuta1/src$


Furthermore, if the copy constructor is not defined explicitly, the program
compiles and produces the same output.


-- 
           Summary: Copy constructors do not work with std::vector as they
                    should
           Product: gcc
           Version: 4.2.3
            Status: UNCONFIRMED
          Severity: blocker
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: ivranos at freemail dot gr
  GCC host triplet: Ubuntu 8.04 x86
GCC target triplet: Ubuntu 8.04 x86


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37720