Fix DefaultListableBeanFactory#copyConfigurationFrom

Closes gh-23569

spring-beans/src/main/java/org/springframework/beans/factory/support/DefaultListableBeanFactory.java

@@ -317,7 +317,8 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 			this.allowEagerClassLoading = otherListableFactory.allowEagerClassLoading;
 			this.dependencyComparator = otherListableFactory.dependencyComparator;
 			// A clone of the AutowireCandidateResolver since it is potentially BeanFactoryAware...
-			setAutowireCandidateResolver(BeanUtils.instantiateClass(getAutowireCandidateResolver().getClass()));
+			setAutowireCandidateResolver(
+					BeanUtils.instantiateClass(otherListableFactory.getAutowireCandidateResolver().getClass()));
 			// Make resolvable dependencies (e.g. ResourceLoader) available here as well...
 			this.resolvableDependencies.putAll(otherListableFactory.resolvableDependencies);
 		}
@@ -904,7 +905,7 @@ public class DefaultListableBeanFactory extends AbstractAutowireCapableBeanFacto
 		for (String bdName : this.beanDefinitionNames) {
 			if (!beanName.equals(bdName)) {
 				BeanDefinition bd = this.beanDefinitionMap.get(bdName);
-				if (beanName.equals(bd.getParentName())) {
+				if (bd != null && beanName.equals(bd.getParentName())) {
 					resetBeanDefinition(bdName);
 				}
 			}