[Php85] Do not convert to pipe on use directly of spread operator on NestedFuncCallsToPipeOperatorRector

Author: samsonasik

rules-tests/Php85/Rector/Expression/NestedFuncCallsToPipeOperatorRector/Fixture/spread_operator_stays.php.inc

@@ -1,13 +1,18 @@
 <?php
 
+namespace Rector\Tests\Php85\Rector\Expression\NestedFuncCallsToPipeOperatorRector\Fixture;
+
 $arrayOfArrays = [['a'], ['a'], ['b']];
 $merged = array_unique(array_merge(...$arrayOfArrays));
 
 ?>
 -----
 <?php
 
+namespace Rector\Tests\Php85\Rector\Expression\NestedFuncCallsToPipeOperatorRector\Fixture;
+
+$arrayOfArrays = [['a'], ['a'], ['b']];
 $merged = array_merge(...$arrayOfArrays)
- |> array_unique(...);
+    |> array_unique(...);
 
 ?>

rules/Php85/Rector/Expression/NestedFuncCallsToPipeOperatorRector.php

@@ -145,6 +145,11 @@ private function processNestedCalls(Expr $expr, bool $deep = false): ?Expr
 
             // If we're deep in recursion and hit a non-FuncCall, this is the base
             if ($deep) {
+                // Spread argument can't be converted to pipe — keep the call as-is
+                if ($arg->unpack) {
+                    return $expr;
+                }
+
                 // Return a pipe with the base expression on the left
                 return new Pipe($arg->value, $this->createPlaceholderCall($expr));
             }