PHPParser error.

[golaod]

I know it's not your library and you just use it here, but maybe you know whether new version of that library ( after you told me to use dev-master ) or something else, makes the line
$countries = $this->country ?: ['US'] + array_keys(\CountryState::getCountries());
to throw an error in padawan-server
exception 'PhpParser\Error' with message 'Syntax error, unexpected T_STRING on line 52'

[mkusher]

I think the problem with php version used, I'm not sure what exactly wrong here