string or null pack / unpack crashes

[anton-dutov]

Code

string src;
writefln("Packed '%s'", src.pack);
writefln("Unpacked '%s'", src.pack.unpack);

Output

Packed '[192]'
object.Exception@../../../.dub/packages/msgpack-d-1.0.0-beta.2/src/msgpack.d(4599): front is called with non array object. type = nil

Same issue for code

writefln("Packed '%s'", null.pack);
writefln("Unpacked '%s'", null.pack.unpack);

Packing is 192 == 0xC0 == Nil
AFAIK should be 160 == 0xA0 == Fixed string

Ok now trying unpack empty string

writefln("Unpacked '%s'", [0xA0].unpack);

Fails

msgpack.UnpackException@../../../.dub/packages/msgpack-d-1.0.0-beta.2/src/msgpack.d(305): Deserialization failure

[repeatedly]

Packed '[192]'
object.Exception@../../../.dub/packages/msgpack-d-1.0.0-beta.2/src/msgpack.d(4599): front is called with non array object. type = nil

This is expected behaviour. Unpacked is a range object so you should check value type before calling Range API.

writefln("Packed '%s'", null.pack);
Packing is 192 == 0xC0 == Nil
AFAIK should be 160 == 0xA0 == Fixed string

What does this sentence mean?
null is not string so msgpack can't serialize null as fixed string.

[anton-dutov]

Packing is 192 == 0xC0 == Nil
AFAIK should be 160 == 0xA0 == Fixed string

Sory, that description for first code sample