From 18e268556dcdadff3d9cd5ed9290fa7d647efb07 Mon Sep 17 00:00:00 2001
From: Jordi Boggiano <j.boggiano@seld.be>
Date: Thu, 1 Apr 2021 10:14:21 +0200
Subject: [PATCH] Fix type warning on php8.1, refs #9770

---
 src/Composer/Command/CreateProjectCommand.php | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/Composer/Command/CreateProjectCommand.php b/src/Composer/Command/CreateProjectCommand.php
index d7cfd1039..a1ad373b5 100644
--- a/src/Composer/Command/CreateProjectCommand.php
+++ b/src/Composer/Command/CreateProjectCommand.php
@@ -343,7 +343,9 @@ EOT
         }
 
         if (null === $stability) {
-            if (preg_match('{^[^,\s]*?@('.implode('|', array_keys(BasePackage::$stabilities)).')$}i', $packageVersion, $match)) {
+            if (null === $packageVersion) {
+                $stability = 'stable';
+            } elseif (preg_match('{^[^,\s]*?@('.implode('|', array_keys(BasePackage::$stabilities)).')$}i', $packageVersion, $match)) {
                 $stability = $match[1];
             } else {
                 $stability = VersionParser::parseStability($packageVersion);