Detect LoadTimeWeaver bean when declared through @Bean method as well

Issue: SPR-10856

spring-context/src/main/java/org/springframework/context/support/AbstractApplicationContext.java

@@ -679,6 +679,13 @@ public abstract class AbstractApplicationContext extends DefaultResourceLoader
 	 */
 	protected void invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory beanFactory) {
 		PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(beanFactory, getBeanFactoryPostProcessors());
+
+		// Detect a LoadTimeWeaver and prepare for weaving, if found in the meantime
+		// (e.g. through an @Bean method registered by ConfigurationClassPostProcessor)
+		if (beanFactory.getTempClassLoader() == null && beanFactory.containsBean(LOAD_TIME_WEAVER_BEAN_NAME)) {
+			beanFactory.addBeanPostProcessor(new LoadTimeWeaverAwareProcessor(beanFactory));
+			beanFactory.setTempClassLoader(new ContextTypeMatchClassLoader(beanFactory.getBeanClassLoader()));
+		}
 	}
 
 	/**