[Bug libstdc++/25719] ostringstream::str().c_str() returns pointer to unallocated memory

["pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #4 from pinskia at gcc dot gnu dot org  2006-01-09 16:24 -------
Here is the testcase from the tar ball for us lazy people:
#include <iostream>
#include <sstream>
using namespace std;

int printit(const char * const str) {
   return *str;
}

int main()
{
   ostringstream ostr;
   ostr << "test test test" << ends;
   const char * const str = ostr.str().c_str();
   printit(str);
   return 0;
}


-----
ostr.str() returns a temporary variable which dies right after the end of the
statement which means that the return value of c_str() becomes invalid after
the statement finishes.

 This is exactly what Paolo said in comment #2.


-- 

pinskia at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |INVALID


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25719