Covers scenario where func_get_args used in constructor (#7006)

Author: peterfox

rules-tests/DeadCode/Rector/ClassMethod/RemoveUnusedConstructorParamRector/Fixture/skip_used_by_get_func_args.php.inc

@@ -0,0 +1,13 @@
+<?php
+
+namespace Rector\Tests\DeadCode\Rector\ClassMethod\RemoveUnusedConstructorParamRector\Fixture;
+
+final class SkipUsedByGetFuncArgs
+{
+    public $data;
+
+    public function __construct($hey, $man)
+    {
+        $this->data = func_get_args();
+    }
+}

src/NodeAnalyzer/ParamAnalyzer.php

@@ -51,6 +51,10 @@ public function isParamUsedInClassMethod(ClassMethod $classMethod, Param $param)
                 return NodeVisitor::STOP_TRAVERSAL;
             }
 
+            if ($this->isFuncGetArgsCall($node)) {
+                $isParamUsed = true;
+            }
+
             if ($this->isUsedAsArg($node, $param)) {
                 $isParamUsed = true;
             }
@@ -164,4 +168,17 @@ private function isParamUsed(Node $node, Param $param): bool
         $arguments = $this->funcCallManipulator->extractArgumentsFromCompactFuncCalls([$node]);
         return $this->nodeNameResolver->isNames($param, $arguments);
     }
+
+    private function isFuncGetArgsCall(Node $node): bool
+    {
+        if (! $node instanceof Node\Expr\FuncCall) {
+            return false;
+        }
+
+        if (! $this->nodeNameResolver->isName($node, 'func_get_args')) {
+            return false;
+        }
+
+        return true;
+    }
 }