Merge branch '5.0' into 5.1

* 5.0:
  [Console] Reset question validator attempts only for actual stdin (bis)

Author: nicolas-grekas

Helper/QuestionHelper.php

@@ -106,7 +106,7 @@ private function doAsk(OutputInterface $output, Question $question)
     {
         $this->writePrompt($output, $question);
 
-        $inputStream = $this->inputStream ?: STDIN;
+        $inputStream = $this->inputStream ?: fopen('php://stdin', 'r');
         $autocomplete = $question->getAutocompleterCallback();
 
         if (null === $autocomplete || !self::$stty || !Terminal::hasSttyAvailable()) {
@@ -473,7 +473,7 @@ private function validateAttempts(callable $interviewer, OutputInterface $output
             } catch (\Exception $error) {
             }
 
-            $attempts = $attempts ?? -(int) $this->isTty();
+            $attempts = $attempts ?? -(int) $this->askForever();
         }
 
         throw $error;
@@ -506,18 +506,20 @@ private function getShell()
         return self::$shell;
     }
 
-    private function isTty(): bool
+    private function askForever(): bool
     {
-        if (!\defined('STDIN')) {
+        $inputStream = $this->inputStream ?: fopen('php://stdin', 'r');
+
+        if ('php://stdin' !== (stream_get_meta_data($inputStream)['url'] ?? null)) {
             return true;
         }
 
         if (\function_exists('stream_isatty')) {
-            return stream_isatty(fopen('php://input', 'r'));
+            return stream_isatty($inputStream);
         }
 
         if (\function_exists('posix_isatty')) {
-            return posix_isatty(fopen('php://input', 'r'));
+            return posix_isatty($inputStream);
         }
 
         return true;