Fix test-coverage problem in ConfigInstantiator & add jacoco to dependabot

.github/dependabot.yml

@@ -69,6 +69,7 @@ updates:
       - dependency-name: org.mockito:*
       - dependency-name: org.awaitility:awaitility
       - dependency-name: com.thoughtworks.xstream:xstream
+      - dependency-name: org.jacoco:*
       # Maven plugins
       - dependency-name: net.revelc.code.formatter:formatter-maven-plugin
       - dependency-name: net.revelc.code:impsort-maven-plugin

CONTRIBUTING.md

@@ -367,6 +367,8 @@ then change into the `coverage-report` directory and run `mvn package`. The code
 This currently does not work on Windows as it uses a shell script to copy all the classes and files into the code coverage
 module.
 
+If you just need a report for a single module, run `mvn install jacoco:report -Ptest-coverage` in that module (or with `-f ...`).
+
 ## Extensions
 
 ### Descriptions

build-parent/pom.xml

@@ -100,7 +100,8 @@
 
         <!-- Code Coverage Properties-->
         <jacoco.agent.argLine></jacoco.agent.argLine>
-        <jacoco.version>0.8.5</jacoco.version>
+        <!-- Note: this version is also set in quarkus-bom but BOMs don't contribute to pluginManagement or properties -->
+        <jacoco.version>0.8.6</jacoco.version>
 
         <maven-dependency-plugin.version>3.1.2</maven-dependency-plugin.version>
 

core/runtime/src/main/java/io/quarkus/runtime/configuration/ConfigInstantiator.java

@@ -65,7 +65,7 @@ private static void handleObject(String prefix, Object o, SmallRyeConfig config)
                 return;
             }
             for (Field field : cls.getDeclaredFields()) {
-                if (Modifier.isFinal(field.getModifiers())) {
+                if (field.isSynthetic() || Modifier.isFinal(field.getModifiers())) {
                     continue;
                 }
                 field.setAccessible(true);