How can I read 0xFF in a file with libc ++ istream_iterator?

Consider the following code example:

#include <iostream>

using namespace std;

int main()
{
  istreambuf_iterator<char> eos;
  istreambuf_iterator<char> iit(cin.rdbuf());
  int i;
  for (i = 0; iit != eos; ++i, ++iit) {
    cout << *iit;
  }
  cout << endl << i << endl;
}

And an input file containing the following: "foo \ xffbar":

$ hexdump testin
0000000 66 6f 6f ff 62 61 72
0000007

Now for the test using clang lib ++ vs gnu libstd ++:

$ make test
clang++ -std=c++11 -stdlib=libc++ -Wall -stdlib=libc++ -o bug-libcc bug.cpp
clang++ -std=c++11 -stdlib=libc++ -Wall -stdlib=libstdc++ -o bug-libstd bug.cpp
./bug-libcc < testin
foo
3
./bug-libstd < testin
foo bar
7

As you can see, the libC ++ version considers 0xff to be the end of the stream and it stops reading. Thus, this leads to two questions.

1) Is this a bug in libC ++ that I should report? My Google searches were not found.

2) Is there a good way around this problem?

EDIT

The following code works:

#include <iostream>
#include <fstream>

using namespace std;

int main()
{
  ifstream ifs ("testin", ios::binary);
  istreambuf_iterator<char> eos;
  istreambuf_iterator<char> iit(ifs.rdbuf());
  int i;
  for (i = 0; iit != eos; ++i, ++iit) {
    cout << *iit;
  }
  cout << endl << i << endl;
}

I suppose this is a binary conversion problem, but that does not explain why libstdc ++ is working correctly.

EDIT2

Using a file without binaries works fine:

ifstream ifs ("testin");

, - . , cin, .