Bug #74297 [NEW]: Simple comparison fails

From: arjen at parse dot nl Operating system: Linux PHP version: 7.1.3 Package: opcache Bug Type: Bug Bug description:Simple comparison fails Description: ------------ php-memcached 3.0.3 libmemcached 1.0.18 memcached 1.4.32 php 7.1.3 Both memcached and opcache needs to be loaded. opcache.enable_cli is not needed. php -n -dextension=memcached.so -dzend_extension=opcache.so script.php If the value ('test') set in memcached is changed, the script no longer fails. ($e == $a) === false, while ($a == $e) === true... Test script: --------------- <?php class r { public $d = ['test' => 'x']; public function m() { return [] + $this->d; } } (function() { $m = new memcached; $m->addServer('127.0.0.1', 11211); $m->set('Something', 'test'); $e = ['test' => 'x']; $a = (new r)->m(); if (0 == ($e <=> $a)) return 'success'; var_dump([$e, $a]); var_dump([serialize($e), serialize($a)]); var_dump([ 'e === a' => $e === $a, 'e == a' => $e == $a, 'e <=> a' => $e <=> $a, 'a <=> e' => $a <=> $e, 'a === e' => $a === $e, 'a == e' => $a == $e] ); var_dump(debug_zval_dump($e), debug_zval_dump($a)); die('this should not happen'); })(); Expected result: ---------------- success Actual result: -------------- array(2) { [0]=> array(1) { ["test"]=> string(1) "x" } [1]=> array(1) { ["test"]=> string(1) "x" } } array(2) { [0]=> string(25) "a:1:{s:4:"test";s:1:"x";}" [1]=> string(25) "a:1:{s:4:"test";s:1:"x";}" } array(6) { ["e === a"]=> bool(true) ["e == a"]=> bool(false) ["e <=> a"]=> int(1) ["a <=> e"]=> int(0) ["a === e"]=> bool(true) ["a == e"]=> bool(true) } array(1) refcount(1){ ["test"]=> string(1) "x" refcount(1) } array(1) refcount(2){ ["test"]=> string(1) "x" refcount(1) } -- Edit bug report at https://bugs.php.net/bug.php?id=74297&edit=1 -- Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=74297&r=trysnapshot54 Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=74297&r=trysnapshot55 Try a snapshot (trunk): https://bugs.php.net/fix.php?id=74297&r=trysnapshottrunk Fixed in SVN: https://bugs.php.net/fix.php?id=74297&r=fixed Fixed in release: https://bugs.php.net/fix.php?id=74297&r=alreadyfixed Need backtrace: https://bugs.php.net/fix.php?id=74297&r=needtrace Need Reproduce Script: https://bugs.php.net/fix.php?id=74297&r=needscript Try newer version: https://bugs.php.net/fix.php?id=74297&r=oldversion Not developer issue: https://bugs.php.net/fix.php?id=74297&r=support Expected behavior: https://bugs.php.net/fix.php?id=74297&r=notwrong Not enough info: https://bugs.php.net/fix.php?id=74297&r=notenoughinfo Submitted twice: https://bugs.php.net/fix.php?id=74297&r=submittedtwice register_globals: https://bugs.php.net/fix.php?id=74297&r=globals PHP 4 support discontinued: https://bugs.php.net/fix.php?id=74297&r=php4 Daylight Savings: https://bugs.php.net/fix.php?id=74297&r=dst IIS Stability: https://bugs.php.net/fix.php?id=74297&r=isapi Install GNU Sed: https://bugs.php.net/fix.php?id=74297&r=gnused Floating point limitations: https://bugs.php.net/fix.php?id=74297&r=float No Zend Extensions: https://bugs.php.net/fix.php?id=74297&r=nozend MySQL Configuration Error: https://bugs.php.net/fix.php?id=74297&r=mysqlcfg