Nginx always return 502 using Homestead - php

Question

I`m using Laravel 5.2 with Homestead and I get this error on every request.
/var/log/nginx/dev.me-error.log
1415#1415: *1 recv() failed (104: Connection reset by peer) while reading response header from upstream, client: 192.168.10.1, server: dev.me, request: "POST /api/v1/auth/user/login HTTP/1.1", upstream: "fastcgi://unix:/var/run/php/php7.0-fpm.sock:", host: "dev.me", referrer: "http://dev.me/"
This is nginx config, but it is reset on every provision, so I don't think that I can change it.
server {
listen 80;
listen 443 ssl http2;
server_name dev.me;
root "/home/vagrant/Code/public";
index index.html index.htm index.php;
charset utf-8;
location / {
try_files $uri $uri/ /index.php?$query_string;
}
location = /favicon.ico { access_log off; log_not_found off; }
location = /robots.txt { access_log off; log_not_found off; }
access_log off;
error_log /var/log/nginx/dev.me-error.log error;
sendfile off;
client_max_body_size 100m;
location ~ \.php$ {
fastcgi_split_path_info ^(.+\.php)(/.+)$;
fastcgi_pass unix:/var/run/php/php7.0-fpm.sock;
fastcgi_index index.php;
include fastcgi_params;
fastcgi_param SCRIPT_FILENAME $document_root$fastcgi_script_name;
fastcgi_intercept_errors off;
fastcgi_buffer_size 16k;
fastcgi_buffers 4 16k;
fastcgi_connect_timeout 300;
fastcgi_send_timeout 300;
fastcgi_read_timeout 300;
}
location ~ /\.ht {
deny all;
}
ssl_certificate /etc/nginx/ssl/dev.me.crt;
ssl_certificate_key /etc/nginx/ssl/dev.me.key;
}
Update:
I finally found the problem. It turns out that Nginx respond with 502 when validation error occurs.
This method is used for validating the data in the project:
public static function make()
{
if ( ! static::$rules) {
throw new \Exception('Nothing to validate but expected to.');
}
$data = (self::$data ? self::$data : Request::all());
$validator = parent::make($data, static::$rules, static::$messages);
if ($validator->fails()) {
$messages = [];
foreach ($validator->getMessageBag()->getMessages() as $field => $message) {
$messages[$field] = array_pop($message);
}
throw new ValidationException($messages);
}
return true;
}
The problem was array_pop($message) inside foreach that causes a php error (only in Laravel context):
/var/log/php7.0-fpm.log
[31-Oct-2016 11:04:31] WARNING: [pool www] child 22235 exited on signal 11 (SIGSEGV) after 1534.070207 seconds from start
[31-Oct-2016 11:04:31] NOTICE: [pool www] child 22361 started
I could not find what this error means. I found similar errors only for old php versions.
The fix:
foreach ($validator->getMessageBag()->getMessages() as $field => $message) {
$messages[$field] = $message[0];
}
I also tried to use array_shift() but it causes the same error as array_pop().
If someone knows why is this happening, please tell me.