C / C++ / MFC

Windows has triggered a breakpoint in ABC.exe.
This may be due to a corruption of the heap, which indicates a bug in ABC.exe or any of the DLLs it has loaded.
This may also be due to the user pressing F12 while ABC.exe has focus.
The output window may have more diagnostic information.

void Toto( const CString& s )
{
  std::stringstream ss(s.GetBuffer());
  // do some stuff with the ss string.
}
void Something( )
{
  CString s("some string");
  Toto ( s );
}

void Toto( const CString& s )
{
  CString s1 = s;
  std::stringstream ss(s1.GetBuffer());
  // do some stuff with the ss string.
}