[logging-log4j2] 01/02: LOG4J2-3572 - Protect from null value

[rgoers]

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rgoers pushed a commit to branch release-2.x
in repository https://gitbox.apache.org/repos/asf/logging-log4j2.git

commit e8fba8caf1ffab6dc0161f8f48611dadedb86b2c
Author: Ralph Goers <rgo...@apache.org>
AuthorDate: Wed Sep 7 08:49:10 2022 -0700

    LOG4J2-3572 - Protect from null value
---
 .../main/java/org/apache/logging/log4j/core/config/LoggerConfig.java    | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git 
a/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java
 
b/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java
index 7f1f43b6ad..b9be60b635 100644
--- 
a/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java
+++ 
b/log4j-core/src/main/java/org/apache/logging/log4j/core/config/LoggerConfig.java
@@ -950,7 +950,7 @@ public class LoggerConfig extends AbstractFilterable 
implements LocationAware {
             } else {
                 LOGGER.warn("levelAndRefs are only allowed in a properties 
configuration. The value is ignored.");
                 result.level = level;
-                result.refs = Arrays.asList(refs);
+                result.refs = refs != null ? Arrays.asList(refs) : new 
ArrayList<>();
             }
         } else {
             result.level = level;