[Issue 19906] __traits(isRef) always yields false for auto ref parameter

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=19906

--- Comment #3 from Sprink <sprink.noreply at gmail.com> ---
Just to clarify the logic would still be incorrect.

It would always be true unless there was some kind of error in __traits().

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