I do not believe this is a bug. You should be able to print the
value by casting to string. (to!() will not work as it will
provide the same results)
Usually enumeration values are not descriptive for how they
should be used. And when printing to the screen it is usually for
debugging or some other task where a meaningful name would be
better.
String enum's are a little different since there value can be
fairly descriptive. But still they usually are not descriptive
about how they should be used. And it would be odd for enum of
int to print the enum name while string enum to print the value.
