Reading unicode string with readf ("%s")

[Ivan Kazmenko via Digitalmars-d-learn]

Hi!

The following code does not correctly handle Unicode strings.
-----
import std.stdio;
void main () {
	string s;
	readf ("%s", &s);
	write (s);
}
-----

Example input ("Test." in cyrillic):
-----
Тест.
-----
(hex: D0 A2 D0 B5 D1 81 D1 82 2E 0D 0A)

Example output:
-----
Тест.
-----
(hex: C3 90 C2 A2 C3 90 C2 B5 C3 91 C2 81 C3 91 C2 82 2E 0D 0A)

Here, the input bytes are handled separately: D0 -> C3 90, A2 -> 
C2 A2, etc.

On the bright side, reading the file with readln works properly.

Is this an expected shortcoming of "%s"-reading a string?
Could it be made to work somehow?
Is it worth a bug report?

Ivan Kazmenko.