@kirillrakhman: That’s an interesting question I hadn’t thought of. I hadn’t realised that different versions of Kotlin were not bytecode compatible with each other. So does that mean that if the v15 EAP changes its Kotlin version frequently (as it does) that plugins have to be updated to the corresponding version? That would be difficult to manage. Is the plan for all stable v15 versions to use exactly the same revision of Kotlin?