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migration symfony 5 4 (#300)
* symfony 5.4 (diff dev) * symfony 5.4 (working) * symfony 5.4 (update autoload) * symfony 5.4 (remove swiftmailer mailer implementation) * symfony 5.4 (php doc and split Global accessor class) ### Impacted packages: composer require php:">=7.2.5 <8.0.0" symfony/console:5.4.* symfony/dotenv:5.4.* symfony/framework-bundle:5.4.* symfony/twig-bundle:5.4.* symfony/yaml:5.4.* --update-with-dependencies composer require symfony/stopwatch:5.4.* symfony/web-profiler-bundle:5.4.* --dev --update-with-dependencies
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@@ -17,8 +17,6 @@ namespace Symfony\Component\VarDumper\Cloner;
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class VarCloner extends AbstractCloner
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{
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private static $gid;
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private static $hashMask = 0;
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private static $hashOffset = 0;
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private static $arrayCache = [];
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/**
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@@ -29,13 +27,12 @@ class VarCloner extends AbstractCloner
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$len = 1; // Length of $queue
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$pos = 0; // Number of cloned items past the minimum depth
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$refsCounter = 0; // Hard references counter
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$queue = [[$var]]; // This breadth-first queue is the return value
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$indexedArrays = []; // Map of queue indexes that hold numerically indexed arrays
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$hardRefs = []; // Map of original zval hashes to stub objects
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$objRefs = []; // Map of original object handles to their stub object counterpart
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$objects = []; // Keep a ref to objects to ensure their handle cannot be reused while cloning
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$resRefs = []; // Map of original resource handles to their stub object counterpart
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$values = []; // Map of stub objects' hashes to original values
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$queue = [[$var]]; // This breadth-first queue is the return value
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$hardRefs = []; // Map of original zval ids to stub objects
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$objRefs = []; // Map of original object handles to their stub object counterpart
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$objects = []; // Keep a ref to objects to ensure their handle cannot be reused while cloning
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$resRefs = []; // Map of original resource handles to their stub object counterpart
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$values = []; // Map of stub objects' ids to original values
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$maxItems = $this->maxItems;
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$maxString = $this->maxString;
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$minDepth = $this->minDepth;
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@@ -47,13 +44,9 @@ class VarCloner extends AbstractCloner
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$stub = null; // Stub capturing the main properties of an original item value
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// or null if the original value is used directly
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if (!self::$hashMask) {
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self::initHashMask();
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self::$gid = md5(dechex(self::$hashMask)); // Unique string used to detect the special $GLOBALS variable
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if (!$gid = self::$gid) {
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$gid = self::$gid = md5(random_bytes(6)); // Unique string used to detect the special $GLOBALS variable
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}
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$gid = self::$gid;
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$hashMask = self::$hashMask;
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$hashOffset = self::$hashOffset;
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$arrayStub = new Stub();
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$arrayStub->type = Stub::TYPE_ARRAY;
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$fromObjCast = false;
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@@ -69,50 +62,45 @@ class VarCloner extends AbstractCloner
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}
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$refs = $vals = $queue[$i];
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if (\PHP_VERSION_ID < 70200 && empty($indexedArrays[$i])) {
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// see https://wiki.php.net/rfc/convert_numeric_keys_in_object_array_casts
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foreach ($vals as $k => $v) {
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if (\is_int($k)) {
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continue;
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}
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foreach ([$k => true] as $gk => $gv) {
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}
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if ($gk !== $k) {
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$fromObjCast = true;
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$refs = $vals = array_values($queue[$i]);
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break;
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}
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}
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}
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foreach ($vals as $k => $v) {
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// $v is the original value or a stub object in case of hard references
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if (\PHP_VERSION_ID >= 70400) {
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$zvalIsRef = null !== \ReflectionReference::fromArrayElement($vals, $k);
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$zvalRef = ($r = \ReflectionReference::fromArrayElement($vals, $k)) ? $r->getId() : null;
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} else {
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$refs[$k] = $cookie;
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$zvalIsRef = $vals[$k] === $cookie;
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$zvalRef = $vals[$k] === $cookie;
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}
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if ($zvalIsRef) {
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if ($zvalRef) {
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$vals[$k] = &$stub; // Break hard references to make $queue completely
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unset($stub); // independent from the original structure
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if ($v instanceof Stub && isset($hardRefs[spl_object_hash($v)])) {
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$vals[$k] = $refs[$k] = $v;
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if (\PHP_VERSION_ID >= 70400 ? null !== $vals[$k] = $hardRefs[$zvalRef] ?? null : $v instanceof Stub && isset($hardRefs[spl_object_id($v)])) {
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if (\PHP_VERSION_ID >= 70400) {
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$v = $vals[$k];
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} else {
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$refs[$k] = $vals[$k] = $v;
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}
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if ($v->value instanceof Stub && (Stub::TYPE_OBJECT === $v->value->type || Stub::TYPE_RESOURCE === $v->value->type)) {
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++$v->value->refCount;
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}
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++$v->refCount;
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continue;
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}
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$refs[$k] = $vals[$k] = new Stub();
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$refs[$k]->value = $v;
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$h = spl_object_hash($refs[$k]);
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$hardRefs[$h] = &$refs[$k];
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$values[$h] = $v;
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$vals[$k] = new Stub();
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$vals[$k]->value = $v;
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$vals[$k]->handle = ++$refsCounter;
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if (\PHP_VERSION_ID >= 70400) {
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$hardRefs[$zvalRef] = $vals[$k];
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} else {
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$refs[$k] = $vals[$k];
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$h = spl_object_id($refs[$k]);
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$hardRefs[$h] = &$refs[$k];
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$values[$h] = $v;
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}
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}
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// Create $stub when the original value $v can not be used directly
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// Create $stub when the original value $v cannot be used directly
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// If $v is a nested structure, put that structure in array $a
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switch (true) {
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case null === $v:
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@@ -151,41 +139,55 @@ class VarCloner extends AbstractCloner
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continue 2;
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}
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$stub = $arrayStub;
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if (\PHP_VERSION_ID >= 80100) {
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$stub->class = array_is_list($v) ? Stub::ARRAY_INDEXED : Stub::ARRAY_ASSOC;
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$a = $v;
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break;
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}
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$stub->class = Stub::ARRAY_INDEXED;
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$j = -1;
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foreach ($v as $gk => $gv) {
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if ($gk !== ++$j) {
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$stub->class = Stub::ARRAY_ASSOC;
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$a = $v;
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$a[$gid] = true;
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break;
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}
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}
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$a = $v;
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if (Stub::ARRAY_ASSOC === $stub->class) {
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// Copies of $GLOBALS have very strange behavior,
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// let's detect them with some black magic
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$a[$gid] = true;
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// Happens with copies of $GLOBALS
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if (isset($v[$gid])) {
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unset($v[$gid]);
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$a = [];
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foreach ($v as $gk => &$gv) {
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$a[$gk] = &$gv;
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// Copies of $GLOBALS have very strange behavior,
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// let's detect them with some black magic
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if (isset($v[$gid])) {
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unset($v[$gid]);
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$a = [];
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foreach ($v as $gk => &$gv) {
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if ($v === $gv && (\PHP_VERSION_ID < 70400 || !isset($hardRefs[\ReflectionReference::fromArrayElement($v, $gk)->getId()]))) {
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unset($v);
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$v = new Stub();
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$v->value = [$v->cut = \count($gv), Stub::TYPE_ARRAY => 0];
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$v->handle = -1;
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if (\PHP_VERSION_ID >= 70400) {
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$gv = &$a[$gk];
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$hardRefs[\ReflectionReference::fromArrayElement($a, $gk)->getId()] = &$gv;
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} else {
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$gv = &$hardRefs[spl_object_id($v)];
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}
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$gv = $v;
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}
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unset($gv);
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} else {
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$a = $v;
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$a[$gk] = &$gv;
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}
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} elseif (\PHP_VERSION_ID < 70200) {
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$indexedArrays[$len] = true;
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unset($gv);
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} else {
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$a = $v;
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}
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break;
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case \is_object($v):
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case $v instanceof \__PHP_Incomplete_Class:
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if (empty($objRefs[$h = $hashMask ^ hexdec(substr(spl_object_hash($v), $hashOffset, \PHP_INT_SIZE))])) {
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if (empty($objRefs[$h = spl_object_id($v)])) {
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$stub = new Stub();
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$stub->type = Stub::TYPE_OBJECT;
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$stub->class = \get_class($v);
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@@ -196,8 +198,7 @@ class VarCloner extends AbstractCloner
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if (Stub::TYPE_OBJECT !== $stub->type || null === $stub->value) {
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break;
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}
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$h = $hashMask ^ hexdec(substr(spl_object_hash($stub->value), $hashOffset, \PHP_INT_SIZE));
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$stub->handle = $h;
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$stub->handle = $h = spl_object_id($stub->value);
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}
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$stub->value = null;
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if (0 <= $maxItems && $maxItems <= $pos && $minimumDepthReached) {
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@@ -271,10 +272,12 @@ class VarCloner extends AbstractCloner
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}
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}
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if ($zvalIsRef) {
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$refs[$k]->value = $stub;
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} else {
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if (!$zvalRef) {
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$vals[$k] = $stub;
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} elseif (\PHP_VERSION_ID >= 70400) {
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$hardRefs[$zvalRef]->value = $stub;
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} else {
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$refs[$k]->value = $stub;
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}
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}
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@@ -305,31 +308,4 @@ class VarCloner extends AbstractCloner
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return $queue;
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}
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private static function initHashMask()
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{
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$obj = (object) [];
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self::$hashOffset = 16 - \PHP_INT_SIZE;
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self::$hashMask = -1;
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if (\defined('HHVM_VERSION')) {
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self::$hashOffset += 16;
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} else {
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// check if we are nested in an output buffering handler to prevent a fatal error with ob_start() below
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$obFuncs = ['ob_clean', 'ob_end_clean', 'ob_flush', 'ob_end_flush', 'ob_get_contents', 'ob_get_flush'];
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foreach (debug_backtrace(\DEBUG_BACKTRACE_IGNORE_ARGS) as $frame) {
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if (isset($frame['function'][0]) && !isset($frame['class']) && 'o' === $frame['function'][0] && \in_array($frame['function'], $obFuncs)) {
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$frame['line'] = 0;
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break;
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}
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}
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if (!empty($frame['line'])) {
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ob_start();
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debug_zval_dump($obj);
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self::$hashMask = (int) substr(ob_get_clean(), 17);
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}
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}
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self::$hashMask ^= hexdec(substr(spl_object_hash($obj), self::$hashOffset, \PHP_INT_SIZE));
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}
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}
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