[BUG] zend_mm_heap corrupted / Segmentation fault: 11

[blieb]

Environment (please complete the following information):

• PHP IMAP version: 3.0.14 / 3.0.15
• PHP Version: 7.1.12 / 7.2.1
• Type of execution: CLI

Describe the bug
Since PHP IMAP Version 3.0.14 I get error when I try to use getMail.

I've tried it on 2 php versions,
on php 7.1.12 I get the error: "zend_mm_heap corrupted"
on php 7.2.1 I get the error: "Segmentation fault: 11"

I'm running this on CLI on MacOS. Php versions from MAMP PRO.
PHP IMAP Version 3.0.13 works fine.
To Reproduce
Steps to reproduce the behavior.

The used code:

        $mailbox = new \PhpImap\Mailbox(
            $config['server'],
            $config['username'],
            $config['password']
        );
        $mailsIds = $mailbox->searchMailbox('ALL');
        $mail = $mailbox->getMail($mailIds[0]);

Expected behavior
Getting email

Screenshots / Outputs
WHen I run it I get on php 7.1 "zend_mm_heap corrupted"
I also tried it on php 7.2 but then I get error "Segmentation fault: 11"

[Sebbo94BY]

From which mail server do you try to get emails from? GMail / G Suite, Microsoft Exchange, Own?

Do you have installed and configured any kind of caching? On the CLI, you may want to disable caching in your php.ini: opcache.enable_cli=0 (if opcache is used for example)

See https://stackoverflow.com/questions/2247977/what-does-zend-mm-heap-corrupted-mean.

[blieb]

Yes already played with that. but no success, I do not have caching enabled.

The mailserver I use is an own mailserver. Running dovecot imap server. (directadmin server)

[Sebbo94BY]

My server is running with Dovecot 2.2.27, but I don't have these problems.

Can you please show your customized Dovecot configuration (only non-default settings)? doveconf -an

Then I can compare these settings with those from mine and check, what's causing the issue.

[blieb]

I also have this problem when I try to use gmail. So it is not server specific.

I'm going to try it on an other system. Mac and linux.

[blieb]

I've running the code inside cakephp framework. Looks like it only fails in combination with that. I continue testing to see if I can find the reason.

[Sebbo94BY]

CakePHP also provides a caching solution: https://book.cakephp.org/3.0/en/core-libraries/caching.html

Is this maybe causing this issue?

[blieb]

Cakephp only caches data. and only when you ask it too.

I've created a new cakephp 3.7 project. Here an updated reproduce step by step:
composer create-project --prefer-dist cakephp/app

go to project folder (app)

composer require php-imap/php-imap

add file: src/Command/testCommand.php (create folder Command)

<?php

namespace App\Command;
use Cake\Console\Arguments;
use Cake\Console\Command;
use Cake\Console\ConsoleIo;

class TestCommand extends Command {

    public function execute(Arguments $args, ConsoleIo $io)
    {
        $mailbox = new \PhpImap\Mailbox(
            '{imap.gmail.com:993/imap/ssl}INBOX', // IMAP server and mailbox folder
            '', // Username for the before configured mailbox
            '' // Password for the before configured username
        );
        $mailsIds = $mailbox->searchMailbox('ALL');
        foreach ($mailsIds as $mailId) {
            $mail = $mailbox->getMail($mailId);
            print_r($mail);
            exit;
        }
    }
}

(fill in username/password)

run command by running: bin/cake test

[blieb]

Looks like a problem with iconv. It crashes at this line:

php-imap/src/PhpImap/Mailbox.php

Line 1013 in c0750ec

$convertedString = function_exists('iconv') ? @iconv($fromEncoding, $toEncoding . '//IGNORE', $string) : null;

[Sebbo94BY]

With which error message does it crash?

Just remove the @ sign in front of iconv(, if you don't see any error messages.

[Sebbo94BY]

@blieb I've changed a few things. Can you please test it again?

• Commit f2cb352
• Commit caee2a6

Use the current code of the develop branch:
composer require php-imap/php-imap:dev-develop

[blieb]

Yes the current dev version works without problems

[Sebbo94BY]

Great! These changes are already included in the latest release v3.0.16. :)