From 9b1c07c0eb44dc1226d86228b2710bc9fbb04e87 Mon Sep 17 00:00:00 2001
From: Moritz Halbritter <moritz.halbritter@broadcom.com>
Date: Thu, 14 Aug 2025 14:54:59 +0200
Subject: [PATCH] Improve null-safety of
 configuration-metadata/spring-boot-configuration-metadata-changelog-generator

See gh-46926
---
 .../configurationmetadata/changelog/ChangelogGenerator.java | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/main/java/org/springframework/boot/configurationmetadata/changelog/ChangelogGenerator.java b/configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/main/java/org/springframework/boot/configurationmetadata/changelog/ChangelogGenerator.java
index 1dca635ee67..3adb1cdbdf9 100644
--- a/configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/main/java/org/springframework/boot/configurationmetadata/changelog/ChangelogGenerator.java
+++ b/configuration-metadata/spring-boot-configuration-metadata-changelog-generator/src/main/java/org/springframework/boot/configurationmetadata/changelog/ChangelogGenerator.java
@@ -62,7 +62,11 @@ public final class ChangelogGenerator {
 
 	static ConfigurationMetadataRepository buildRepository(File directory) {
 		ConfigurationMetadataRepositoryJsonBuilder builder = ConfigurationMetadataRepositoryJsonBuilder.create();
-		for (File file : directory.listFiles()) {
+		File[] files = directory.listFiles();
+		if (files == null) {
+			throw new IllegalStateException("'files' must not be null");
+		}
+		for (File file : files) {
 			try (JarFile jarFile = new JarFile(file)) {
 				JarEntry metadataEntry = jarFile.getJarEntry("META-INF/spring-configuration-metadata.json");
 				if (metadataEntry != null) {