[CodingStyle] Skip unknown method name for CallUserFuncCallToVariadic…

…Rector [closes #2430]

packages/CodingStyle/src/Rector/FuncCall/CallUserFuncCallToVariadicRector.php

@@ -63,9 +63,13 @@ public function refactor(Node $node): ?Node
         }
 
         $functionName = $this->getValue($node->args[0]->value);
+        if (!is_string($functionName)) {
+            return null;
+        }
 
         $args = [];
         $args[] = new Arg($node->args[1]->value, false, true);
+
         return $this->createFunction($functionName, $args);
     }
 }

packages/CodingStyle/tests/Rector/FuncCall/CallUserFuncCallToVariadicRector/Fixture/skip_unknown_value.php.inc

@@ -0,0 +1,11 @@
+<?php
+
+namespace Rector\CodingStyle\Tests\Rector\FuncCall\CallUserFuncCallToVariadicRector\Fixture;
+
+class SkipUnknownValue
+{
+    public function run($name)
+    {
+        call_user_func_array($name, $items);
+    }
+}