Framework: Arr::flatten exception in PHP 7.3.0RC3

[kstych]

• Laravel Version: 5.7.9
• PHP Version: 7.3.0RC3
• Database Driver & Version:

Description:

Arr::flatten produces error "Unsupported operand types"
Possible related issue : https://bugs.php.net/bug.php?id=75533

Steps To Reproduce:

Create a Fresh Laravel App
change the welcome view to
<?php $a=\App\User::all(); ?>
reload browser

Exception in console (php-fpm error log)

[21-Oct-2018 09:08:01 UTC] PHP Fatal error: Uncaught Error: Unsupported operand types in /vendor/laravel/framework/src/Illuminate/Support/Arr.php:219
Stack trace:

0 /vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2706): Illuminate\Support\Arr::flatten(Array)

1 /vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2027): Illuminate\Database\Query\Builder->getBindings()

2 /vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2015): Illuminate\Database\Query\Builder->runSelect()

3 /vendor/laravel/framework/src/Illuminate/Database/Query/Builder.php(2499): Illuminate\Database\Query\Builder->Illuminate\Database\Query{closure}()

4 /vendor/laravel/framework/sr in /vendor/laravel/framework/src/Illuminate/Support/Arr.php on line 219

[staudenmeir]

I suspect $depth - 1 to cause this when $depth is INF, but I can't reproduce it. What OS are you using?

[kstych]

Fedora - Rawhide, php-7.3 just landed in updates and it broke ever laravel project

packages installed

php-opcache-7.3.0~rc3-1.fc30.x86_64
php-pdo-7.3.0~rc3-1.fc30.x86_64
php-mysqlnd-7.3.0~rc3-1.fc30.x86_64
php-recode-7.3.0~rc3-1.fc30.x86_64
php-process-7.3.0~rc3-1.fc30.x86_64
php-bcmath-7.3.0~rc3-1.fc30.x86_64
php-gd-7.3.0~rc3-1.fc30.x86_64
php-tidy-7.3.0~rc3-1.fc30.x86_64
php-soap-7.3.0~rc3-1.fc30.x86_64
php-cli-7.3.0~rc3-1.fc30.x86_64
php-7.3.0~rc3-1.fc30.x86_64
php-common-7.3.0~rc3-1.fc30.x86_64
php-gmp-7.3.0~rc3-1.fc30.x86_64
php-mbstring-7.3.0~rc3-1.fc30.x86_64
php-json-7.3.0~rc3-1.fc30.x86_64
php-fpm-7.3.0~rc3-1.fc30.x86_64
php-imap-7.3.0~rc3-1.fc30.x86_64
php-xmlrpc-7.3.0~rc3-1.fc30.x86_64
php-xml-7.3.0~rc3-1.fc30.x86_64
php-intl-7.3.0~rc3-1.fc30.x86_64
php-pgsql-7.3.0~rc3-1.fc30.x86_64

[staudenmeir]

It works for me on Windows and Ubuntu.

Do you get the same error from <?php echo INF - 1; ?>?

[kstych]

yes, no error when reinstalled OS with direct install of php-7.3 and not updating from php-7.2

probably some conflicting configuration files

[hopeseekr]

I'm having the exact same problem... Works fine on 7.2, as soon as I upgrade to 7.3.0, I get:

[2018-12-17 18:28:57] testing.ERROR: Failed Reason:/var/www/app/Providers/GlobalExceptionServiceProvider.php {"Reason":"Unsupported operand types"} 
[2018-12-17 18:28:57] testing.ERROR: Unsupported operand types {"exception":"[object] (Symfony\\Component\\Debug\\Exception\\FatalThrowableError(code: 0): Unsupported operand types at /var/www/vendor/laravel/framework/src/Illuminate/Support/Arr.php:219)

[staudenmeir]

@hopeseekr What code is triggering the error? A query?

Does <?php echo INF - 1; ?> work for you?

[hopeseekr]

<?php echo INF -1; ?> returns INF.

The code works on 7.1-7.2, when I upgrade to 7.3.0, it explodes.

When I edit Illuminate\Database\Query\Builder and change it from:

    public function getBindings()
    {
        return Arr::flatten($this->bindings);
    }

to

    public function getBindings()
    {
        return Arr::flatten($this->bindings, 255);
    }

it works fine on PHP 7.3.0.

[staudenmeir]

What OS are you using? Does Arr::flatten([[]]); trigger the same error?

[kawax]

Fresh App in Homestead(Per Project Installation)
Laravel : 5.7.18
vagrant box : 6.4.0
PHP : 7.3.0RC4

Update to PHP7.3.0

sudo apt update
sudo apt upgrade

phpinfo

PHP Version 7.3.0-2+ubuntu18.04.1+deb.sury.org+1

Homestead.yaml

sites:
    -
        map: homestead.test
        to: /home/vagrant/code/public
        php: "7.3"

routes/web.php

Route::get('/', function () {
    \Illuminate\Support\Arr::flatten([[]]);
});

=> Unsupported operand types

echo INF - 1;

=> Unsupported operand types

[dmitri-f]

Same issue here.

Unsupported operand types in Arr.php line 219

PHP: 7.3.0
OS: macOS 10.14.2 (Mojave)
Laravel: 5.5

php > echo INF - 1;
INF

[staudenmeir]

This is very weird. I'm using the same Homestead configuration, but I can't reproduce it.

[staudenmeir]

@driesvints Can you reproduce this?

[driesvints]

I can't reproduce this locally on my machine. Since we also don't have reports of this on Forge etc I suspect this to be a bug within Homestead itself. Please make sure you're at least running the stable 7.3.0 release and not an RC and open an issue on the Homestead repository.

[driesvints]

Actually I don't think this is a Homestead issue but rather something else obscure. Maybe try one of the following channels first:

• Laracasts Forums
• Laravel.io Forums
• Discord
• Larachat
• IRC
• StackOverflow

[hopeseekr]

This is happening to me inside Docker via https://github.com/phpexpertsinc/laravel_quickstart

Definitely not specific to Homestead.

[gdhnz]

Same issue for me in Docker when using an image built from php:7.3-apache.

[driesvints]

I really think this is a configuration issue of some sort and not a Laravel problem because we can't reproduce it. If you can provide the exact setup and PHP configurations for this bug to be reproduced we could have another look.

[tuathail]

Hit the same issue on the following system:
Ubuntu 18.04
Laravel 5.6.38
PHP 7.3

In case it's of use to anyone, disabling xdebug resolved the issue for us. Need to dig into it a bit more to understand why...

[taylorotwell]

Anything that works perfectly on PHP 7.2 and not on PHP 7.3 but isn't a documented PHP 7.3 breaking change shouldn't be considered a framework bug.

[gdhnz]

Tried disabling xdebug and now working fine for me too. Sorry.

Will wait for the final release of xdebug for 7.3 before trying it again.

[roobware]

Thx to @gdhnz 👍

_Same problem with Xdebug (v2.7.0beta1) under Archlinux (4.19.13-1-MANJARO) with Apache (2.4.37) and PHP 7.3.0_

[fititnt]

Same error here, but with the 7.3.0 Stable (not the RC one). And on the lastest release of Laravel, the v5.7.19.

<?php echo INF - 1; ?> returns INF.

$ php -v
PHP 7.3.0-2+ubuntu16.04.1+deb.sury.org+1 (cli) (built: Dec 17 2018 09:22:12) ( NTS 

Edit:

eita. Well, can confirm that this issue happens only if php-xdebug is also enabled. My version 2.7.0~beta1+2.6.1+2.5.5-1+ubuntu16.04.1+deb.sury.org+10 (its the lastests from https://xdebug.org/). So, for who comes here from google, thanks to @tuathail & @gdhnz, you can try for now just run the following instead of downgrade from PHP 7.3 to 7.2:

sudo apt remove php-xdebug

Or equivalent.

[aspraveen]

I too faced the same error on my homestead box when upgraded the project to php 7.3

'Unsupported operand types'

Removing php-xdebug has solved the issue for now.

[GrahamCampbell]

The latest (unreleased) versions of php 7.3 and xdebug DO WORK now. ;)

PHP 7.3.1RC1 or later + xdebug master (23rd December or later).

[GrahamCampbell]

I've documented the required versions at https://github.com/laravel/framework/issues/27052.

[yos1p]

I'm still having this problem... Although I already updated Homestead and PHP environment.

Homestead v8.0.0
PHP: PHP 7.3.1-1+ubuntu18.04.1+deb.sury.org+1 — cli
Laravel: 5.7.22

Any idea why is this happen?

[fititnt]

hey @iamyaoxi , Look at #27030. Have some workarounds there. This comment https://github.com/laravel/framework/issues/27052#issuecomment-456420979 also mention why Homestead have this issue

[driesvints]

I'm going to lock this thread because I doubt any further helpful discussion can continue. Please wait with upgrading if you rely on this until a new patch release from PHP and a new xdebug version is released.