[5.1] updater contraintchecker stability check early return (#43497)

Author: LadySolveig

libraries/src/Updater/ConstraintChecker.php

@@ -93,6 +93,14 @@ public function check(array $candidate, $minimumStability = Updater::STABILITY_S
             return false;
         }
 
+        // Check stability, assume true when not set
+        if (
+            isset($candidate['stability'])
+            && !$this->checkStability($candidate['stability'], $minimumStability)
+        ) {
+            return false;
+        }
+
         $result = true;
 
         // Check php_minimum, assume true when not set
@@ -111,14 +119,6 @@ public function check(array $candidate, $minimumStability = Updater::STABILITY_S
             $result = false;
         }
 
-        // Check stability, assume true when not set
-        if (
-            isset($candidate['stability'])
-            && !$this->checkStability($candidate['stability'], $minimumStability)
-        ) {
-            $result = false;
-        }
-
         return $result;
     }