Missed errors in search method

[ikarol]

Hi,
It's my first time posting there, so please forgive for any mistake made.

I've recently encountered a weird error when I was doing search with Since date condition(that returned 0 messages as a result, which is incorrect in my case):

PHP Notice: Unknown: SEARCH Database is not full text indexed (errflg=2) in Unknown on line 0

It appears to be a system caused issue and was resolved by our admins.
However, I think it will be better if this library will gracefully catch and address all similar errors.

So, we could move error checking logic above like this

public function getMessages(ConditionInterface $search = null, int $sortCriteria = null, bool $descending = false, string $charset = null): MessageIteratorInterface
    {
        ...
       if (false !== ($error = \imap_last_error())) {
            throw new InvalidSearchCriteriaException(\sprintf('Invalid search criteria [%s] - %s', $query, $error));
       }
       if (false === $messageNumbers) {
            // imap_search can also return false
            $messageNumbers = [];
        }

        return new MessageIterator($this->resource, $messageNumbers);
    }

This way any unexpected error will be reported right away without producing imprecise results.