Using a variable when traversing an array with yq causes strange behaviour

[mikefarah]

Discussed in #1565

^{Originally posted by klimenkov February 22, 2023}
Consider an example: echo [1, 2] | yq '[.[] | . as $x | $x + 1]'
it returns a list of 4 elements:

- 2
- 3
- 2
- 3

but I expected a list of 2 values [2, 3].
Is it a feature of product traversal? If so, how to make it flat?

[mikefarah]

Fixed in v4.31.2