Array modification doesn't propagate for indexing after change the values for var array

[ynfle]

When resetting an entire var array using the values in the original array and then using [] to access the elements, some of the old values are still there.

Example

var a = [1, 2, 3, 4, 5]
echo a
echo [a[2], a[3], a[0], a[1], a[4]]
a = [a[2], a[3], a[0], a[1], a[4]]
echo a

Current Output

[1, 2, 3, 4, 5]
[3, 4, 1, 2, 5]
[3, 4, 3, 4, 5]

Expected Output

[1, 2, 3, 4, 5]
[3, 4, 1, 2, 5]
[3, 4, 1, 2, 5]

Possible Solution

🤷‍♂️ Possibly some optimization issue

Additional Information

Doesn't work from the current devel build all the way back until 0.18.x. Before that, there is some issue with array constructors that I am not familiar with and therefore couldn't test

I tested on latest back until 0.18.x on play.nim-lang.org and 1.5.1 with choosenim on my local machine (Mac OSX)

[cooldome]

Looks like an aliasing problem

[ynfle]

Any idea where I'd look to fix it or to even see if that's the issue and I'll give it a go?