Cannot inline bytecode built with JVM target 1.8 into bytecode that is being built with JVM target 1.6

Question

When trying to run the Example CorDapp (GitHub CorDapp) via IntelliJ, I receive the following error:

Cannot inline bytecode built with JVM target 1.8 int

Answer 1

All answers here are using gradle but if someone like me ends up here and needs answer for maven:

    
        src/main/kotlin
        src/test/kotlin

        
            
                org.jetbrains.kotlin
                kotlin-maven-plugin
                ${kotlin.version}
                
                    
                        compile
                        compile
                        
                            compile
                        
                    
                    
                        test-compile
                        test-compile
                        
                            test-compile
                        
                    
                
                
                    11
                
            
        
    

The change from jetbrains archetype for kotlin-jvm is the specifying the jvmTarget. In my case 11