Error: this.__lambda2 has no value

[Andrey via Digitalmars-d-learn]

Hello,
My code:

import std.string : join;

enum Key : string
{
    First = "qwerty",
    Last = "zaqy"
}

struct Qaz
{

enum text(alias Values) = Values.map!(value => "bool has" ~ value ~ " = false;").join();

}

//enum text(alias Values) = Values.map!(value => "bool has" ~ value ~ " = false;").join();

void main()
{
    pragma(msg, Qaz.text!([Key.First, Key.Last]));
}

During compilation I get:

/dlang/dmd/linux/bin64/../../src/phobos/std/algorithm/iteration.d(475): Error: 
this.__lambda2 has no value

onlineapp.d(33): Error: template instance `onlineapp.Qaz.text!(["qwerty", "zaqy"])` error instantiating onlineapp.d(33): while evaluating pragma(msg, (Qaz).text!(["qwerty", "zaqy"]))

If I uncomment that line and use

pragma(msg, text!([Key.First, Key.Last]));

then compilation is passed.
What happens?