Not working after upgrading to PHP 7.3

[dportalesr]

From @dciancu:

After upgrading PHP to 7.3.0 - latest version (and Xdebug to 2.7.0beta1 latest version compatible with PHP 7.3, in case it matters), tinker is no longer working. It launches correctly but I after I input a command it just exits with no error, nothing written to log file and status code 0.

laravel/tinker#63

I can confirm it's happening to me as well. Any input closes the REPL, no errors or messages at all.

Any ideas about how to proceed? Thanks.

[GrahamCampbell]

Does it work after uninstalling xdebug?

[GrahamCampbell]

xdebug 2.7.0beta1 is not actually compatible fully with php 7.3 yet. No release or even master of xdebug fully works yet.

[dciancu]

@GrahamCampbell It doesn't work with xdebug disabled either

[dciancu]

xdebug works very well with php 7.3 from what I have tested, had no issue with it.

[GrahamCampbell]

Does it work after full uninstallation of the plugin, not just disabling?

[GrahamCampbell]

xdebug works very well with php 7.3 from what I have tested, has no issue with it.

There are various known issues documented on xdebug's github, including a failing test suite.

[dciancu]

@GrahamCampbell not disabled by xdebug.enable, but removed from php.ini I meant

[dportalesr]

Apparently Xdebug added support for PHP 7.3 recently
https://bugs.xdebug.org/view.php?id=1519
xdebug/xdebug#430

As @GrahamCampbell mentions there are still a couple of issues in their tracker. Not sure how to generate a report of this problem for them.

[chapeupreto]

I have a fresh PHP7.3 install (brew install php@7.3) with no xdebug and that very same problem is happening to me as well:

[bobthecow]

Update: as discussed below, this is a bug in Homebrew/macOS/PHP/pcntl. It should really be worked around by disabling pcre.jit in your php.ini.

It has something to do with forking / pcntl. I'm trying to sort it out.

In the meantime, you can use PsySH by disabling pcntl support, by adding this to your config file:

// really, don't do this. disable it in php.ini :)
return [
  'usePcntl' => false, 
];

[bobthecow]

Ok, got it!

Homebrew-installed PHP 7.3.0 on Mojave segfaults when calling preg_match from a child process.

Repro:

<?php

if (preg_match('/./', 'a')) echo "pre-fork works\n";

$pid = pcntl_fork();
if ($pid == -1) {
    die('fail');
} elseif ($pid) {
    if (preg_match('/./', 'a')) echo "parent works\n";
    pcntl_wait($status);
    if (pcntl_wifsignaled($status) && pcntl_wtermsig($status) == SIGSEGV) {
        die('child process segfaulted');
    }
} else {
    if (preg_match('/./', 'a')) echo "child works\n";
}

In PHP < 7.3, this results in:

pre-fork works
parent works
child works

But in PHP 7.3, we get:

pre-fork works
parent works
child process segfaulted

I'm not sure what the extent of this issue is. 3v4l.org doesn't have PCNTL so we can't test there. All versions of PHP that Travis tests worked. That said, Travis is testing RC3, so it might be a bug introduced between that and the stable release?

Are y'all on Homebrew + Mojave? Can anyone repro this with other PHP 7.3 versions or sources or operating systems?

[dportalesr]

Are y'all on Homebrew + Mojave?

Yeah.

Same here, Homebrew and Mojave without xdebug installed.