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commit d63f16d09dbc9207988f1214f7bf3f56e50b1ef3
Author: Claus Ibsen <[email protected]>
AuthorDate: Tue Apr 4 09:26:32 2023 +0200

    Guard against NPE
---
 .../src/main/java/org/apache/camel/impl/engine/DefaultRoutesLoader.java | 2 ++
 1 file changed, 2 insertions(+)

diff --git 
a/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultRoutesLoader.java
 
b/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultRoutesLoader.java
index b6bee7885a4..13e82d97ce0 100644
--- 
a/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultRoutesLoader.java
+++ 
b/core/camel-base-engine/src/main/java/org/apache/camel/impl/engine/DefaultRoutesLoader.java
@@ -140,6 +140,8 @@ public class DefaultRoutesLoader extends ServiceSupport 
implements RoutesLoader,
 
     @Override
     public RoutesBuilderLoader getRoutesLoader(String extension) throws 
Exception {
+        ObjectHelper.notNull(extension, "extension");
+
         RoutesBuilderLoader answer = 
getCamelContext().getRegistry().lookupByNameAndType(
                 ROUTES_LOADER_KEY_PREFIX + extension,
                 RoutesBuilderLoader.class);

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