Toit

I have some basic code, simplified, it is as follows...

```
  constructor.fromList list/List:
    d := list[12:]
```

but I get the following error

```
<pkg:..>: error: Can't call result of evaluating expression
    d := list[12:]
              ^~
Compilation failed
Error: exit status 1
```

As far as I can tell im following the docs per https://libs.toit.io/core/collections/class-List#operator%20%5B..%5D(2%2C0%2C0%2Cfrom%2Cto)

The `12:` is interpreted as a call to `12` with the block `:` (empty block).

.. looks like : to me too 😛 I was staring at the docs and all! 😄