Unable to serialize const classes to Bson

[japplegame]

import vibe.data.bson;

class Foo {
    int a;
    Bson toBson() const { return serializeToBson(["a": a]); }
    static Foo fromBson(Bson bson) { return new Foo; }
}

void main() { 
    const auto foo = new Foo;
    auto bson = serializeToBson(foo);
}

vibe\data\serialization.d(146): Error: function vibe.data.bson.BsonSerializer.writeValue!(Foo).writeValue (Foo value) is not callable using argument types (const(Foo))

[japplegame]

Doesn't compile again. :(

[s-ludwig]

Turns out the unit test for this was flawed (copy/past error). I've fixed both, the test and the code again now. Sorry, that was definitely quite unfortunate. I had to revert the use of auto ref to make things compile on 2.064 and GDC/LDC and trusted the test.

[japplegame]

Thanks.