Rest Client extension seems to have problem with kotlin

[ia3andy]

Describe the bug
I've tried to reproduce the doc tutorial using a kotlin environment https://quarkus.io/guides/rest-client. It won't instanciate the rest client:

org.junit.jupiter.api.extension.TestInstantiationException: TestInstanceFactory [io.quarkus.test.junit.QuarkusTestExtension] failed to instantiate test class [org.acme.ExampleResourceTest]: io.quarkus.builder.BuildException: Build failure: Build failed due to errors
	[error]: Build step io.quarkus.arc.deployment.ArcProcessor#validate threw an exception: javax.enterprise.inject.spi.DeploymentException: javax.enterprise.inject.UnsatisfiedResolutionException: Unsatisfied dependency for type org.acme.CountriesService and qualifiers [@Default]
	- java member: org.acme.ExampleResource#countriesService
	- declared on CLASS bean [types=[org.acme.ExampleResource], qualifiers=[@Default, @Any], target=org.acme.ExampleResource]
	at io.quarkus.arc.processor.BeanDeployment.processErrors(BeanDeployment.java:850)
	at io.quarkus.arc.processor.BeanDeployment.init(BeanDeployment.java:220)
	at io.quarkus.arc.processor.BeanProcessor.initialize(BeanProcessor.java:106)
	at io.quarkus.arc.deployment.ArcProcessor.validate(ArcProcessor.java:251)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at io.quarkus.deployment.ExtensionLoader$1.execute(ExtensionLoader.java:941)
	at io.quarkus.builder.BuildContext.run(BuildContext.java:415)
	at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35)
	at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:2011)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1535)
	at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1426)
	at java.base/java.lang.Thread.run(Thread.java:834)
	at org.jboss.threads.JBossThread.run(JBossThread.java:479)
Caused by: javax.enterprise.inject.UnsatisfiedResolutionException: Unsatisfied dependency for type org.acme.CountriesService and qualifiers [@Default]
	- java member: org.acme.ExampleResource#countriesService
	- declared on CLASS bean [types=[org.acme.ExampleResource], qualifiers=[@Default, @Any], target=org.acme.ExampleResource]
	at io.quarkus.arc.processor.Beans.resolveInjectionPoint(Beans.java:472)
	at io.quarkus.arc.processor.BeanInfo.init(BeanInfo.java:404)
	at io.quarkus.arc.processor.BeanDeployment.init(BeanDeployment.java:212)
	... 14 more

Expected behavior
It should instanciate it and work

Actual behavior
We get an exception

To Reproduce
Steps to reproduce the behavior:

1. https://code.quarkus.io/api/download?g=org.acme&a=code-with-quarkus&v=1.0.0-SNAPSHOT&b=MAVEN&c=org.acme.ExampleResource&e=io.quarkus%3Aquarkus-resteasy-jsonb&e=io.quarkus%3Aquarkus-rest-client&e=io.quarkus%3Aquarkus-kotlin
2. Add a service:

package org.acme

import org.eclipse.microprofile.rest.client.inject.RegisterRestClient

import javax.ws.rs.GET
import javax.ws.rs.Path
import javax.ws.rs.Produces

@Path("/v2")
@RegisterRestClient(baseUri = "https://andy/")
interface CountriesService {

    @GET
    @Path("/get")
    @Produces("application/json")
    fun get(): Set<String>
}

3. Inject it:

...
@Path("/hello")
class ExampleResource {

    @Inject
    @RestClient
    lateinit var countriesService: CountriesService
...

4. run the test

[ia3andy]

The solution is there:
https://stackoverflow.com/questions/55458873/error-to-inject-some-dependency-with-kotlin-quarkus

[loicmathieu]

@ia3andy maybe we can raise this issue on the MP RestClient side ? As I understand it, adding an @Target on the @RestClient annotation may help Kotlin.

[ia3andy]

@loicmathieu yeah, that would be great. I don't see why a developer should have to do something special to make it work.

[kenfinnigan]

Raised eclipse/microprofile-rest-client#232

[gsmet]

I'm reopening this one. Let's close it when we upgrade MP Rest Client.

[emmanuelbernard]

This is fixed AFAIK