quarkus: wrong proxy bytecode generated for FacesContext#getNamingContainerSeparatorChar()

I currently create a extension for JSF/MyFaces and it seems that the proxy generation creates wrong bytecode for this single case:

Steps to reproduce:

• clone https://github.com/apache/myfaces.git, a mvn install -DskipTests This may be required as changes may not be in maven repo yet.

• clone https://github.com/tandraschko/quarkus-myfaces

• cd quarkus-myfaces, mvn clean install

• cd quarkus-myfaces-showcase, mvn clean package

• run via: java -jar target/quarkus-myfaces-showcase-1.0-SNAPSHOT-runner.jar

• open http://localhost:8080/issue4.xhtml

• click the button

NOTE: it works fine when using mvn compile quarkus:dev

Following exception happens:

java.lang.VerifyError: Bad type on operand stack
Exception Details:
  Location:
    org/apache/myfaces/cdi/JsfArtifactProducer_ProducerMethod_getFacesContext_6432ec49e096ea975e673cec96a0eaae1039fc21_ClientProxy.getNamingContainerSeparatorChar()C @7: areturn
  Reason:
    Type integer (current frame, stack[0]) is not assignable to reference type
  Current Frame:
    bci: @7
    flags: { }
    locals: { 'org/apache/myfaces/cdi/JsfArtifactProducer_ProducerMethod_getFacesContext_6432ec49e096ea975e673cec96a0eaae1039fc21_ClientProxy' }
    stack: { integer }
  Bytecode:
    0x0000000: 2ab6 000e b600 28b0                    

        at org.apache.myfaces.cdi.JsfArtifactProducer_ProducerMethod_getFacesContext_6432ec49e096ea975e673cec96a0eaae1039fc21_Bean$$function$$30.get(Unknown Source)
        at io.quarkus.arc.LazyValue.get(LazyValue.java:42)
        at org.apache.myfaces.cdi.JsfArtifactProducer_ProducerMethod_getFacesContext_6432ec49e096ea975e673cec96a0eaae1039fc21_Bean.get(Unknown Source)
        at org.apache.myfaces.cdi.JsfArtifactProducer_ProducerMethod_getFacesContext_6432ec49e096ea975e673cec96a0eaae1039fc21_Bean.get(Unknown Source)
        at io.quarkus.arc.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:310)
        at io.quarkus.arc.ArcContainerImpl.beanInstanceHandle(ArcContainerImpl.java:322)
        at io.quarkus.arc.BeanManagerImpl.getReference(BeanManagerImpl.java:74)

If you can’t resolve MyFace 3.0.0-SNAPSHOT, please clone https://github.com/apache/myfaces.git and do a mvn install -DskipTests