haxe.macro.Field.doc doesn't contain docs?

gistfile1.txt

// Test.hx

@:build(Builder.build()) class Test
{
	/**
	Docs!
	*/
	public static function main() {}
}

// Builder.hx

class Builder
{
	public static function build()
	{
		var fields = haxe.macro.Context.getBuildFields();
		for (field in fields)
		{
			trace(field.name + ":" + field.doc);
		}
		return fields;
	}
}

// haxe -x Test