[Issue 4927] writefln silently ignores arguments not present in the format string

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=4927

Mathias LANG <pro.mathias.lang at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
                 CC|                            |pro.mathias.lang at gmail.com
         Resolution|---                         |FIXED

--- Comment #7 from Mathias LANG <pro.mathias.lang at gmail.com> ---
As mentioned, the issue in the original message was per spec.
However, the part with positional argument was not, and has since been fixed:
```D
import std.stdio;
void main() {
    writefln("A%2$s B%1$s", 10);
}
```

This correctly errors out now.

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