jmes bug

correct.php

<?php

// data[?start_date == `2014-02`]|[0]
function jmespath_9326e1bbd5d5f072d89fb1f6b627aa45(JmesPath\Runtime\RuntimeInterface $runtime, $value)
{
    $current = $value;
    // Visiting projection node
    $value = is_array($value) && isset($value['data']) ? $value['data'] : null;

    if (!is_array($value)) {
        $value = null;
    } elseif ($value) {
        $collected_530677dda6f6e = array();
        foreach ($value as $key => $v530677dda6f58) {
            $value = $v530677dda6f58;
            // Visiting projection node
            // Visiting comparator node
            $val_530677dda7017 = $value;
            $cur_530677dda7020 = $current;
            $value = is_array($value) && isset($value['start_date']) ? $value['start_date'] : null;
            $left_530677dda7026 = $value;
            $value = $val_530677dda7017;
            $value = '2014-02';
            $right_530677dda702d = $value;
            $result = $left_530677dda7026 === $right_530677dda702d;
            $value = $result === true ? $val_530677dda7017 : null;
            $current = $cur_530677dda7020;
            if ($value !== null) {
                // Visiting current node (no-op)
            }
            if ($value !== null) {
                $collected_530677dda6f6e[] = $value;
            }
        }
        $value = $collected_530677dda6f6e;
    }
    $current = $value;
    $value = is_array($value) && isset($value[0]) ? $value[0] : null;

    return $value;
}

incorrect.php

<?php

// data[?start_date == `2014-02`]|[0]
function jmespath_9326e1bbd5d5f072d89fb1f6b627aa45(JmesPath\Runtime\RuntimeInterface $runtime, $value)
{
    $current = $value;
    // Visiting projection node
    $value = is_array($value) && isset($value['data']) ? $value['data'] : null;

    if (!is_array($value)) {
        $value = null;
    } elseif ($value) {
        $collected_530677968631f = array();
        foreach ($value as $key => $v53067796862a6) {
            $value = $v53067796862a6;
            // Visiting projection node
            // Visiting comparator node
            $val_53067796863cb = $value;
            $cur_5306779686446 = $current;
            $value = is_array($value) && isset($value['start_date']) ? $value['start_date'] : null;
            $left_53067796864bd = $value;
            $value = $val_53067796863cb;
            $value = 2014;
            $right_5306779686532 = $value;
            $result = $left_53067796864bd === $right_5306779686532;
            $value = $result === true ? $val_53067796863cb : null;
            $current = $cur_5306779686446;
            if ($value !== null) {
                // Visiting current node (no-op)
            }
            if ($value !== null) {
                $collected_530677968631f[] = $value;
            }
        }
        $value = $collected_530677968631f;
    }
    $current = $value;
    $value = is_array($value) && isset($value[0]) ? $value[0] : null;

    return $value;
}