[Issue 19566] Warn when the same argument is passed two times, once as ref or out, the other not

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19566

apham <apz28 at hotmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |apz28 at hotmail.com

--- Comment #2 from apham <apz28 at hotmail.com> ---
This should be an error as below


```
void stuff(I,O)(const I input, out O output){}

void other()
{
    ubyte[] data = void;
    stuff(data, data);
}
```

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