Array(Bool)#[](start, count) always returns an array with all elements false

[nickpwhite]

Overview

When calling the [](start, count) on an array of Bool values, the resulting array always contains only false.

The same issue occurs using other variants of the #[] method that return sub-arrays (#[](range) and #[]? methods).

I think this line is breaking. It's (eventually) called from here

Code Example

[true, false, true, true][0, 2] #=> [false, false]

Version

$ crystal -v
Crystal 0.31.1 [0e2e1d067] (2019-09-30)

LLVM: 8.0.0
Default target: x86_64-unknown-linux-gnu