Qualifier on alternative bean - duplicate element error

Describe the bug

I have a bean with annotations:

@ApplicationScoped @MyQualifier("some-value") public class MyBean { .. }

In the tests I have an alternative bean for it with following annotations:

@ApplicationScoped @MyQualifier("some-value") @Alternative @Priority(5) public class TestMyBean extends MyBean { .. }

When running the tests, an IllegalArgumentException happens with: duplicate element @MyQualifier(“some-value”)

When I remove the qualifier from the alternative it works as expected.

Expected behavior

I would expect that the Qualifier annotation can be defined on the alternative bean as it was prior to Quarkus 2.3 (Likely, the change was introduced with https://github.com/quarkusio/quarkus/pull/19759)

Actual behavior

No response

How to Reproduce?

No response

Output of uname -a or ver

No response

Output of java -version

openjdk version “11.0.10” 2021-01-19 LTS

GraalVM version (if different from Java)

No response

Quarkus version or git rev

2.4.1.Final

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

No response

Additional information

No response

[mkouba]

Why should the qualifier from the supertype be ignored? I´d expect that the qualifier on the supertype is still recognized if the qualifier is marked with @inherited.

I mean it should be ignored if the subtype declares an annotation of the same type… as defined by the CDI spec.

[mkouba]

But it seems that the issue is already resolved with Quarkus 2.5.x

Yes, the IAE comes from the java.util.Set#of() method and it was fixed in https://github.com/quarkusio/quarkus/pull/21232 in 2.4.2.Final.