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heneveld pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/brooklyn-server.git

commit aa0bbf3038ea22c1c2b145c550c8bb530b20ed14
Author: Alex Heneveld <[email protected]>
AuthorDate: Wed Mar 29 16:44:48 2023 +0100

    prevent failure in formatString if an entry is null (was using guava list)
---
 .../java/org/apache/brooklyn/core/sensor/DependentConfiguration.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git 
a/core/src/main/java/org/apache/brooklyn/core/sensor/DependentConfiguration.java
 
b/core/src/main/java/org/apache/brooklyn/core/sensor/DependentConfiguration.java
index 0e1a22ab83..731a0eff25 100644
--- 
a/core/src/main/java/org/apache/brooklyn/core/sensor/DependentConfiguration.java
+++ 
b/core/src/main/java/org/apache/brooklyn/core/sensor/DependentConfiguration.java
@@ -487,7 +487,7 @@ public class DependentConfiguration {
                 @Override
                 @Nullable
                 public T apply(@Nullable U input) {
-                    return transformer.apply(ImmutableList.of(input));
+                    return 
transformer.apply(MutableList.of(input).asUnmodifiable());
                 }
             });
         }

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