Reinterpret is not aware that tuples are bitstypes now

[mschauer]

julia> Tuple{UInt}
Tuple{UInt64}

julia> isbits(Tuple{UInt})
true

julia> isbits((1, 1))
true

julia> reinterpret(Tuple{UInt}, (1, 1))
ERROR: reinterpret: expected bits type as first argument
 in reinterpret at essentials.jl:116

The same problem with Complex{Real} for example.

[yuyichao]

I think this is probably a dup of #11822

AFAIK, the issue is that reinterpret is expecting a bitstype, not only isbits() == true.

[vtjnash]

while, they do qualify as isbits, Tuples aren't bitstypes. (I'm pretty sure there is already an issue open about whether the extend reinterpret to cover more types)