transliterate - Inappropriate ioctl for device

[inputsprocket]

Hi,
I can't get php-postal to work at all!

The issue seems to be related to this I guess -

WARN invalid UTF-8 at transliterate (transliterate.c:791) errno: Inappropriate ioctl for device

which appears whenever I try to run eg:
$expansions = Postal\Expand::expand_address("Quatre vingt douze Ave des Champs-Élysées");

Running that very simple one liner on the command line gives:
WARN invalid UTF-8 at transliterate (transliterate.c:791) errno: Inappropriate ioctl for device WARN invalid UTF-8 at transliterate (transliterate.c:791) errno: Inappropriate ioctl for device WARN invalid UTF-8 at transliterate (transliterate.c:791) errno: Inappropriate ioctl for device WARN invalid UTF-8 at transliterate (transliterate.c:791) errno: Inappropriate ioctl for device ^C

And it just hangs - forcing Ctrl-C to get out

Any ideas?