Build warning 'Failed to index boolean ...' in Quarkus < 3.7

[mschorsch]

Describe the bug

Quarkus < 3.7 shows the following build warning if MediaType.APPLICATION_JSON and return value Boolean. The MediaType is wrong but the error message is not very helpful to identify the problem.

Note: The problem is not reproducible in Quarkus >= 3.7.

[WARNING] [io.quarkus.deployment.steps.CombinedIndexBuildStep] Failed to index boolean: Class does not exist in ClassLoader QuarkusClassLoader:Deployment Class Loader: PROD for code-with-quarkus-1.0.0-SNAPSHOT@33ff6a62

How to Reproduce?

reproducer.zip

./mvnw clean install

Output of java -version

Java 17

Quarkus version or git rev

3.6.9

Build tool (ie. output of mvnw --version or gradlew --version)

Maven

[geoand]

This was likely fixed in #37456. @Ladicek I believe we can backport it, right?

[Ladicek]

Yeah, I think so.

[gsmet]

I don't plan on doing any other 3.6 so if it's fixed in 3.7, it's all good (that's what I secretly hoped when I asked for this issue to be opened).

Not sure we would want to backport it to 3.2 (and if it affects 3.2).

[geoand]

I don't plan on doing any other 3.6

Makes sense!