From c2eded3621483ed5c25f9849f3fd80d01f2f7741 Mon Sep 17 00:00:00 2001
From: Dariusz Ruminski <dariusz.ruminski@gmail.com>
Date: Tue, 14 Dec 2021 13:32:07 +0100
Subject: [PATCH] check each slice if it's outside, not only first one

---
 src/Tokenizer/Tokens.php | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/Tokenizer/Tokens.php b/src/Tokenizer/Tokens.php
index 01a68b95dce..df05dc89f19 100644
--- a/src/Tokenizer/Tokens.php
+++ b/src/Tokenizer/Tokens.php
@@ -858,13 +858,6 @@ public function insertSlices(array $slices): void
         $this->setSize($oldSize + $itemsCount);
 
         krsort($slices);
-
-        $firstIndex = array_key_first($slices);
-
-        if ($firstIndex > $oldSize) {
-            throw new \OutOfBoundsException('Cannot insert outside of collection.');
-        }
-
         $insertBound = $oldSize - 1;
 
         // since we only move already existing items around, we directly call into SplFixedArray::offset* methods.
@@ -874,6 +867,10 @@ public function insertSlices(array $slices): void
                 throw new \OutOfBoundsException(sprintf('Invalid index "%s".', $index));
             }
 
+            if ($index > $oldSize) {
+                throw new \OutOfBoundsException(sprintf('Cannot insert index "%s" outside of collection.', $firstIndex));
+            }
+
             $slice = \is_array($slice) || $slice instanceof self ? $slice : [$slice];
             $sliceCount = \count($slice);