From 806aa1b8c7e55e58b72a89a5a9c0afc04f5f5d74 Mon Sep 17 00:00:00 2001
From: Patrizio Bekerle <patrizio@bekerle.com>
Date: Thu, 15 Sep 2022 15:56:19 +0200
Subject: [PATCH] Add warning for possibly truncated inputs in QuestionHelper
 (#47586)

---
 src/Symfony/Component/Console/Helper/QuestionHelper.php | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/Symfony/Component/Console/Helper/QuestionHelper.php b/src/Symfony/Component/Console/Helper/QuestionHelper.php
index 3811aa82cec20..76cf77df5e195 100644
--- a/src/Symfony/Component/Console/Helper/QuestionHelper.php
+++ b/src/Symfony/Component/Console/Helper/QuestionHelper.php
@@ -430,6 +430,11 @@ private function getHiddenResponse(OutputInterface $output, $inputStream, bool $
 
         $value = fgets($inputStream, 4096);
 
+        if (4095 === strlen($value)) {
+            $errOutput = $output instanceof ConsoleOutputInterface ? $output->getErrorOutput() : $output;
+            $errOutput->warning('The value was possibly truncated by your shell or terminal emulator');
+        }
+
         if (self::$stty && Terminal::hasSttyAvailable()) {
             shell_exec('stty '.$sttyMode);
         }