C++: istream.eof on gcc 4.6

[Hugo Arregui]

Hi guys,

today I find a change on istream.eof when I upgrade from 4.5.2 to 4.6.0.

Here's a little example showing the change, this code will show "true,
true" using gcc 4.5.2 (and previous), and "true, false" using 4.6:

I don't know if it's a bug, or some expected change, or even if i'm
wrong blaming gcc. Can you confirm that?

-----
The code:

#include <iostream>
#include <sstream>

using namespace std;

static bool is_next_char_readable(istream& file)
{
    file.get();
    const bool result = file.eof();
    file.unget();
    return result;
}

int main()
{
    istringstream s("test");
    s.seekg(0, ios_base::end);
    std::cout << is_next_char_readable(s) << std::endl;
    std::cout << is_next_char_readable(s) << std::endl;
    return 0;
}