Merge branch '2.21' into 2.x

Author: cowtowncoder

protobuf/src/main/java/com/fasterxml/jackson/dataformat/protobuf/ProtobufGenerator.java

@@ -1026,8 +1026,8 @@ protected void _writeEnum(int index) throws IOException
 
     protected void _reportEnumError(Object enumValue) throws IOException
     {
-        _reportErrorF("No Enum '%s' found for property '%s'; valid values = %s"
-                +_currField.getEnumValues(), _currField.name, enumValue);
+        _reportErrorF("No Enum '%s' found for property '%s'; valid values = %s",
+                enumValue, _currField.name, _currField.getEnumValues());
     }
 
     /*

release-notes/VERSION-2.x

@@ -129,6 +129,7 @@ No changes since 2.19.1
   when creating parser with fixed buffer
 #651: (smile) Ensure Smile backend supports `StreamReadConstraints.maxTokenCount`
 #652: (cbor) Ensure CBOR backend supports `StreamReadConstraints.maxTokenCount`
+- Minor fix to `ProtobufGenerator._reportEnumError()` helper method
 
 2.18.5 (27-Oct-2025)