PHP 7: Segfault with Igbinary and Variable References

[ssigwart]

Running the following code produces a segmentation fault:

ini_set('memcached.serializer', 'igbinary');
$memcached = new Memcached();
$memcached->addServer('127.0.0.1', 11211);
$a = 'a';
$b = ['a'=>&$a];
$memcached->setMulti($b, 60);

Here are the version numbers:
PHP: 7.0.15
igbinary: 2.0.1
memcached: 3.0.0
libmemcached: 1.0.18

The segmentation fault does not occur if you remove the reference (i.e. use $b = ['a'=>$a];) or add ini_set('memcached.serializer', 'php');

[sodabrew]

Thanks for the bug report!

[sodabrew]

@TysonAndre does php-memcached require any code changes to benefit from the bug fix in igbinary? Or just note it for users to upgrade their igbinary versions?

[TysonAndre]

No, php-memcached doesn't require any code changes.