Is this expected?: ``` import std.stdio; import std.algorithm; import std.array;
void main()
{
auto d = Appender!string();
//auto d = appender!string(); // works
string[] arr = ["foo", "bar", "baz"];
arr.joiner("\n").copy(d);
writeln(d.data);
}
```
Using Appender outpust nothing, using appender works ok.
