g++ 4.8.2: help on vector

[Francis ANDRE]

Hi

On this sytem
$ uname -a
CYGWIN_NT-6.1 idefix 1.7.29(0.272/5/3) 2014-04-07 13:46 x86_64 Cygwin


I do not understand the output of this small program usinf the <vector> 
container.

#include <iostream>
#include <vector>
using namespace std;

int main() {
     cout << "!!!Hello World!!!" << endl;
     int i = 1;
     int j = 2;
     int k = 3;
     vector<int*>    v(5);
     v.push_back(&i);
     v.push_back(&j);
     v.push_back(&k);

     for( auto &n : v) {
         cout << "int* =" << n;
         if (n != 0)
             cout << ", int=" << *n;
         cout << endl;
     }
     return 0;
}

!!!Hello World!!!
int* =0
int* =0
int* =0
int* =0
int* =0
int* =0x22aa60, int=1
int* =0x22aa5c, int=2
int* =0x22aa58, int=3


Is this could be a bug?

FA

$ g++ -v
Using built-in specs.
COLLECT_GCC=g++
COLLECT_LTO_WRAPPER=/usr/lib/gcc/x86_64-pc-cygwin/4.8.2/lto-wrapper.exe
Target: x86_64-pc-cygwin
Configured with: 
/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-3/src/gcc-4.8.2/configure 
--srcdir=/cygdrive/i/szsz/tmpp/cygwin64/gcc/gcc-4.8.2-3/src/gcc-4.8.2 
--prefix=/usr --exec-prefix=/usr --bindir=/usr/bin --sbindir=/usr/sbin 
--libexecdir=/usr/libexec --datadir=/usr/share --localstatedir=/var 
--sysconfdir=/etc --libdir=/usr/lib --datarootdir=/usr/share 
--docdir=/usr/share/doc/gcc --htmldir=/usr/share/doc/gcc/html -C 
--build=x86_64-pc-cygwin --host=x86_64-pc-cygwin 
--target=x86_64-pc-cygwin --without-libiconv-prefix 
--without-libintl-prefix --enable-shared --enable-shared-libgcc 
--enable-static --enable-version-specific-runtime-libs 
--enable-bootstrap --disable-__cxa_atexit --with-dwarf2 
--with-tune=generic 
--enable-languages=ada,c,c++,fortran,lto,objc,obj-c++ --enable-graphite 
--enable-threads=posix --enable-libatomic --enable-libgomp 
--disable-libitm --enable-libquadmath --enable-libquadmath-support 
--enable-libssp --enable-libada --enable-libgcj-sublibs 
--disable-java-awt --disable-symvers 
--with-ecj-jar=/usr/share/java/ecj.jar --with-gnu-ld --with-gnu-as 
--with-cloog-include=/usr/include/cloog-isl --without-libiconv-prefix 
--without-libintl-prefix --with-system-zlib --libexecdir=/usr/lib
Thread model: posix
gcc version 4.8.2 (GCC)