Hi, IntelliJ IDEA shows an error when the code references `KClass`: ```Class 'kotlin.reflect.KClass'...

# announcements

[Igor Akkerman]

Hi, IntelliJ IDEA shows an error when the code references `KClass`:

Class 'kotlin.reflect.KClass' is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler

I'm using Kotlin 1.5.0-M1 in the latest EAP of the IDE with Kotlin plugin targeting 1.5.0 turned on, the project is built using Gradle. `KClass`seems to be referenced correctly by the IDE as coming from the 1.5.0-M1 JAR.

Has anybody seen this error before?

[audriusk]

I'm using Kotlin 1.5.0-M1 in the latest EAP

If by in the latest EAP you mean Intellij IDEA 2021.1 beta. Then it doesn't support neither Kt 1.4.30 stable nor 1.5 ATM

[audriusk]

And I see same error 🙂

[Igor Akkerman]

This is the build I just downloaded:

Build #IU-211.6693.14, built on March 25, 2021

[Igor Akkerman]

@audriusk thanks for your feedback

[audriusk]

https://youtrack.jetbrains.com/issue/KTIJ-1186

[audriusk]

For ref.

[Igor Akkerman]

Thanks!

[Igor Akkerman]

So if I downloaded the Kotlin SDK 1.4.30 separately, it would support this?

[audriusk]

No. it supports only <=1.4.20

[audriusk]

If you want to use stable Kt, your best bet would we IJ 2020. But it doesn't support latest stable Android. If you need that too then you should try Android Studio. But not Android Studio Canary. That doesn't support stable Kt either 😄

[Igor Akkerman]

For Android, I use Android Studio 😉

[Igor Akkerman]

But "stable Kt" will not refer to 1.5.0-M1, right?

[Igor Akkerman]

Sorry, I'm new to the Kotlin release process (although old to IntelliJ 🙂 )

[audriusk]

I don't think that there is official Kotlin release process. Here you can see which Kotlin plugin version are released https://plugins.jetbrains.com/plugin/6954-kotlin/versions/staging

KT. 1.5 EAP is supported only in ide:

<https://plugins.jetbrains.com/plugin/6954-kotlin/versions/staging/112612|203-1.5.0-M1-release-247-AS6682.9>
203.6682—203.*

[audriusk]

203.6682—203.*

[Igor Akkerman]

I see, not compatible with any IntelliJ version 😄

[Igor Akkerman]

Thanks for the link!