Accessing an empty array sometimes works

[iacore]

Example

echo "Hello world"
let a: array[0, int] = []
let b = 9999999
echo a[b]

Current Output

Hello world
0

Expected Output

Hello world
/usr/lib/nim/system/fatal.nim(49) sysFatal
Error: unhandled exception: index 9999999 not in 0 .. -1 [IndexDefect] (something like this)

~> nim -v
Nim Compiler Version 1.4.8 [Linux: amd64]
Compiled at 2021-06-07
Copyright (c) 2006-2021 by Andreas Rumpf

active boot switches: -d:release -d:nativeStackTrace