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kotlinlang

Hi all, I am just wondering what causes the issue below
```"Class ... is compiled by a pre-release version of Kotlin and cannot be loaded by this version of the compiler```

most likely `-Xcontext-receivers`, as <https://kotlinlang.org/docs/whatsnew1620.html#prototype-of-context-receivers-for-kotlin-jvm|https://kotlinlang.org/docs/whatsnew1620.html#prototype-of-context-receivers-for-kotlin-jvm> states
&gt; The feature is a prototype available only for Kotlin/JVM. With `-Xcontext-receivers` enabled, the compiler will produce pre-release binaries that cannot be used in production code.

I believe `-Xuse-k2` also (if you enable some new experimental features that aren't in pre-K2)