BUG: missing interpret for Crystal::Splat

[ysbaddaden]

The compiler allows to splat a Tuple inside a new Tuple, but the interpreter doesn't like it.

Here is a simple reproduce:

# bug.cr
foo = {1, 2, 3}
bar = {*foo, 4, 5}
p bar

The compiler is fine:

$ crystal run bug.cr
{1, 2, 3, 4, 5}

The interpreter doesn't:

$ crystal i bug.cr
In bug.cr:2:5

 2 | b = {*foo, 4, 5}
         ^
Error: BUG: missing interpret for Crystal::Splat