merged branch AntonioAngelino/2.3 (PR #8258)

This PR was merged into the 2.3 branch.

Discussion
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fix-progressbar-start

lastMessagesLength and barCharOriginal should be reset if you want to use 2 or more Progress Bars in the same command flow.

Commits
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e65723c fix-progressbar-start

src/Symfony/Component/Console/Helper/ProgressHelper.php

@@ -186,6 +186,8 @@ class ProgressHelper extends Helper
         $this->current   = 0;
         $this->max       = (int) $max;
         $this->output    = $output;
+        $this->lastMessagesLength = 0;
+        $this->barCharOriginal = '';
 
         if (null === $this->format) {
             switch ($output->getVerbosity()) {