[CodingStyle] Handle crash on pass args on CallUserFuncToMethodCallRe…

…ctor (#6598)

rules-tests/CodingStyle/Rector/FuncCall/CallUserFuncToMethodCallRector/Fixture/pass_arg.php.inc

@@ -0,0 +1,35 @@
+<?php
+
+namespace Rector\Tests\CodingStyle\Rector\FuncCall\CallUserFuncToMethodCallRector\Fixture;
+
+abstract class PassArg
+{
+    public array $args;
+
+    public function __construct(array $args = [])
+    {
+        if ($args !== [] && method_exists($this, 'args')) {
+            $this->args = call_user_func([$this, 'args'], $args);
+        }
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\Tests\CodingStyle\Rector\FuncCall\CallUserFuncToMethodCallRector\Fixture;
+
+abstract class PassArg
+{
+    public array $args;
+
+    public function __construct(array $args = [])
+    {
+        if ($args !== [] && method_exists($this, 'args')) {
+            $this->args = $this->args($args);
+        }
+    }
+}
+
+?>

rules/CodingStyle/Rector/FuncCall/CallUserFuncToMethodCallRector.php

@@ -90,7 +90,7 @@ public function refactor(Node $node): ?Node
         $originalArgs = $node->args;
         unset($originalArgs[0]);
 
-        $methodCall->args = $originalArgs;
+        $methodCall->args = array_values($originalArgs);
         return $methodCall;
     }
 }