Report unused variable for non-by-ref use

[muglug]

<?php

$data = [];

return function () use ($data) {
    $data[] = 1;
};

https://psalm.dev/r/9a4fc7e7e6

[psalm-github-bot]

I found these snippets:

https://psalm.dev/r/9a4fc7e7e6

<?php

$data = [];

return function () use ($data) {
    $data[] = 1;
};

Psalm output (using commit 086237a):

No issues!