`variable` is never used, is used

[mitchuman]

Describe the bug Warning: variable is never used appears, but the variable is in fact used as in index for an array.

Expected Not give a warning

Actual

{%- liquid
  for _ in (1..2)
    assign product_num = 'product_' | append: forloop.index
    render 'product-item', product: all_products[block.settings[product_num]]
  endfor
-%}

Debugging information

• mcOS
• VSCode extension v1.10.0

Additional context