From 6a04e90ae197dc9efbefcb9454005ed7f83c9de6 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Wed, 19 Nov 2025 10:41:02 +0700
Subject: [PATCH 1/2] [DeadCode] Skip used from property fetch reference on
 loop on RemoveUnusedVariableAssignRector

---
 ..._used_from_property_fetch_reference.php.inc | 13 +++++++++++++
 .../RemoveUnusedVariableAssignRector.php       | 18 ++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 rules-tests/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector/Fixture/skip_used_from_property_fetch_reference.php.inc

diff --git a/rules-tests/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector/Fixture/skip_used_from_property_fetch_reference.php.inc b/rules-tests/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector/Fixture/skip_used_from_property_fetch_reference.php.inc
new file mode 100644
index 00000000000..0e540013678
--- /dev/null
+++ b/rules-tests/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector/Fixture/skip_used_from_property_fetch_reference.php.inc
@@ -0,0 +1,13 @@
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\Assign\RemoveUnusedVariableAssignRector\Fixture;
+
+function SkipUsedFromPropertyFetchReference(\stdClass $target, array $path, mixed $value): void {
+    $current = $target;
+    foreach ($path as $key) {
+      $current = &$current->{$key};
+    }
+    $current = $value;
+}
+
+?>
diff --git a/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php b/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php
index eeed814e41e..266075ef3f5 100644
--- a/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php
+++ b/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php
@@ -19,6 +19,7 @@
 use PhpParser\Node\Stmt\Expression;
 use PhpParser\Node\Stmt\Function_;
 use PhpParser\NodeVisitor;
+use Rector\Contract\PhpParser\Node\StmtsAwareInterface;
 use Rector\DeadCode\SideEffect\SideEffectNodeDetector;
 use Rector\NodeAnalyzer\VariableAnalyzer;
 use Rector\NodeManipulator\StmtsManipulator;
@@ -158,6 +159,22 @@ private function shouldSkip(array $stmts): bool
         });
     }
 
+    private function collectAssignRefVariableNames(Stmt $stmt, array &$refVariableNames): void
+    {
+        if (! $stmt instanceof StmtsAwareInterface) {
+            return;
+        }
+
+        $this->traverseNodesWithCallable(
+            $stmt,
+            function (Node $subNode) use (&$refVariableNames): void {
+                if ($subNode instanceof AssignRef && $subNode->var instanceof Variable) {
+                    $refVariableNames[] = (string) $this->getName($subNode->var);
+                }
+            }
+        );
+    }
+
     /**
      * @param array<int, Stmt> $stmts
      * @return array<int, string>
@@ -169,6 +186,7 @@ private function resolvedAssignedVariablesByStmtPosition(array $stmts): array
 
         foreach ($stmts as $key => $stmt) {
             if (! $stmt instanceof Expression) {
+                $this->collectAssignRefVariableNames($stmt, $refVariableNames);
                 continue;
             }
 

From a4a28e40f9ba7a71af6f8f5cf59e21b0c586f550 Mon Sep 17 00:00:00 2001
From: Abdul Malik Ikhsan <samsonasik@gmail.com>
Date: Wed, 19 Nov 2025 10:43:17 +0700
Subject: [PATCH 2/2] fix phpstan

---
 .../Rector/Assign/RemoveUnusedVariableAssignRector.php     | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php b/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php
index 266075ef3f5..0417e173d4a 100644
--- a/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php
+++ b/rules/DeadCode/Rector/Assign/RemoveUnusedVariableAssignRector.php
@@ -159,6 +159,9 @@ private function shouldSkip(array $stmts): bool
         });
     }
 
+    /**
+     * @param string[] $refVariableNames
+     */
     private function collectAssignRefVariableNames(Stmt $stmt, array &$refVariableNames): void
     {
         if (! $stmt instanceof StmtsAwareInterface) {
@@ -167,10 +170,12 @@ private function collectAssignRefVariableNames(Stmt $stmt, array &$refVariableNa
 
         $this->traverseNodesWithCallable(
             $stmt,
-            function (Node $subNode) use (&$refVariableNames): void {
+            function (Node $subNode) use (&$refVariableNames): Node {
                 if ($subNode instanceof AssignRef && $subNode->var instanceof Variable) {
                     $refVariableNames[] = (string) $this->getName($subNode->var);
                 }
+
+                return $subNode;
             }
         );
     }