Would this be a bug in the glibc ?

whatthefloat.c

#include <stdio.h>

int
main()
{
    float f = 3.5;
    int i = 8;
    const char *format_previous = "%f";
    printf ("This will output the previous float, expecting the good one\n");
    printf (format_previous, f);
    printf (" (expected %f)\n", f);
    printf (format_previous, i);
    printf (" (expected %f)\n", (float) i);
    printf ("This will output the good float, expecting 0\n");
    const char *format_0 = "%f (expected %f)\n";
    printf (format_0, f, f);
    printf (format_0, i, (float) i);
    return 0;
}