Seeing ´Undefined property: Less_Tree_Operation::$value with v5.1.1 on PHP 8.3

[kdambekalns]

I see

Warning: Undefined property: Less_Tree_Operation::$value in /…/wikimedia/less.php/lib/Less/Tree/Dimension.php line 79

Fun fact: At this point $other is no the expected Less_Tree_Dimension but an instance of Less_Tree_Operation (type safety would be great).

I would love to help debugging this, but I can't even tell if this can be caused by faulty LESS input (it should not lead to such a warning, though) or is a programmatic error.

[Krinkle]

@kdambekalns

We'll a reduced example input that reproduces the error to investigate.

I suggest comparing also to upstream Less.js at http://lesscss.org/less-preview/, to see how the same input behaves there.