Bug report

The simple check with isset() and !empty()stopped to work as expected, when I updated to 0.12.51. It worked without errors from 0.12.33 to 0.12.50. I couldn't reproduce it in the playground.

Code snippet that reproduces the problem

if (isset($description)) {
    echo $description;
}

Expected output

No errors.

Actual output

Undefined variable: $description