Merge branch '5.0'

* 5.0:
  Use PHP 7.2 minimum in tests run with github actions
  Fix exception messages containing exception messages

Author: nicolas-grekas

Definition/BaseNode.php

@@ -468,7 +468,7 @@ final public function finalize($value)
 
                 throw $e;
             } catch (\Exception $e) {
-                throw new InvalidConfigurationException(sprintf('Invalid configuration for path "%s": '.$e->getMessage(), $this->getPath()), $e->getCode(), $e);
+                throw new InvalidConfigurationException(sprintf('Invalid configuration for path "%s": ', $this->getPath()).$e->getMessage(), $e->getCode(), $e);
             }
         }