Use MergedAnnotation.getRoot() method

Closes gh-16661

spring-boot-project/spring-boot-dependencies/pom.xml

@@ -179,7 +179,7 @@
 		<snakeyaml.version>1.24</snakeyaml.version>
 		<solr.version>8.0.0</solr.version>
 		<!-- deprecated in favor of "spring-framework.version" -->
-		<spring.version>5.2.0.M1</spring.version>
+		<spring.version>5.2.0.BUILD-SNAPSHOT</spring.version>
 		<spring-amqp.version>2.2.0.M1</spring-amqp.version>
 		<spring-batch.version>4.2.0.M1</spring-batch.version>
 		<spring-cloud-connectors.version>2.0.5.RELEASE</spring-cloud-connectors.version>

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/context/properties/ConfigurationPropertiesScanRegistrar.java

@@ -114,11 +114,8 @@ class ConfigurationPropertiesScanRegistrar
 				.from(type, MergedAnnotations.SearchStrategy.EXHAUSTIVE)
 				.get(Component.class);
 		if (component.isPresent()) {
-			MergedAnnotation<?> parent = component;
-			while (parent.getParent() != null) {
-				parent = parent.getParent();
-			}
-			throw new InvalidConfigurationPropertiesException(type, parent.getType());
+			throw new InvalidConfigurationPropertiesException(type,
+					component.getRoot().getType());
 		}
 	}