rustc claims that "array lengths can't depend on generic parameters" for exactly one type of expression, while various other far more complex expressions involving const generics work perfectly

[slightlyoutofphase]

Quite simply:

The fact that this playground link gives an error (which is literally the only syntactic way I'm aware of to get that error), while on the other hand I was able to write this fully-working-exactly-as-written crate that depends heavily on the error message in question being simply untrue, seems.... weird to me.

I don't intend to come off as abrasive or anything. Really my point here is that const generics actually work great! Really great! As it stands I rarely encounter any problems with them. Which makes me think this overly-specific error message that only surfaces with one exact (very simple) way you can use const generics is some kind of overlooked leftover from earlier development.

Of course I might be wrong, and absolutely disregard this issue if that's the case!

[Centril]

Duplicate of #43408.