Internal compiler errors in Kotlin 1.1.3


I first noticed this last Friday, when I installed IntelliJ 2017.2 Public Preview, which contains Kotlin 1.1.3-85-eap… And unfortunately I didn’t realise then, how close to release this version was, and had reported only one via the IDE exception reporting mechanism.

The Kotlin compiler 1.1.3 gives me 2 different internal compiler errors on the code of my project, at least when building using the IDE-native plugin compiler.

One of the exceptions points to a specific line of code which has so far been legal Kotlin code in all versions of Kotlin 1.0 and 1.1 that I’ve used on this project:

class AuthenticationConfiguration(
    tokenExpiresIn: Long
    .... ) {
    var tokenExpiryDate: ZonedDateTime

    init {
        tokenExpiryDate = + Duration.ofSeconds(tokenExpiresIn - 10L)

The problem is with the line in the init {} block; I’ve removed the rest of the class as it didn’t seem relevant to the context.

The exception message is:

Error:Kotlin: [Internal Error] org.jetbrains.kotlin.codegen.CompilationException: Back-end (JVM) Internal error: Don't know how to generate outer expression for class AuthenticationConfiguration
Cause: Don't know how to generate outer expression for class AuthenticationConfiguration
File being compiled and position: (43,68) in D:/Dev/l1nda/gig-marketplace/temper-bridge/src/main/kotlin/nl/l1nda/jobmp/integrations/temper/model/AuthenticationConfiguration.kt
PsiElement: tokenExpiresIn
The root cause was thrown at:

The second internal compiler error doesn’t have a line number attached but is a ClassCastException.

I have attached the full stacktraces of both excpetions.

Since these errors are blocking for the project and the IDE plugin has already been updated I wonder if there’s a way to downgrade to the Kotlin 1.1.2 plugin version until both these issues have been resolved?


kotlin-1.1.3-ice-code-generation-exception.txt.7z (2.0 KB)
kotlin-1.1.3-ice-classcast-exception.txt.7z (1.5 KB)


I’ve raised issues for both problems in YouTrack:


I have the same two issues in my project. After updating the Intellij Kotlin plugin to 1.1.3 I started getting the exception from KT-18667. I tried updating the project to 1.1.3 and fixing the other compile errors I was then getting (same as in KT-18668). Then the project built with maven successfully but in Intellij I still got the first exception.

What actually helped was to uninstall the Kotlin plugin and after an Intellij restart i had the 1.1.2 version again - I don’t know how that actually worked, but now Intellij is usable again.


Thanks, I’ll try that too! Because for me right now, not being able to run or debug from IntelliJ is a pretty big nuisance.


Fortunately, removing the Kotlin plugin indeed worked. IntelliJ reverted to the version that was delivered with it and now my system works properly again.