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Been getting this Kotlin JS issue via Gradle: *e: File '/home/napperley/.gradle/caches/modules-2/files-2.1/org.jetbrains.kotlin/kotlin-stdlib-js/1.1.50/94cb645045b500ffe1b7f1711567c9ebe3635100/kotlin-stdlib-js-1.1.50.jar' was compiled with an incompatible version of Kotlin. The binary version of its metadata is 1.1.0, expected version is 1.0.1*. What is binary version metadata? If Kotlin JS is downgraded to *1.1.4-3* then the issue doesn't appear. Have another Kotlin JS project using *v1.1.50* which transpiles fine via Gradle which is strange. :confused:

<@U5R5FGVH7> looks like you migrated to new version of stdlib but still using old compiler. Please check it.

Note, in 1.1.50 we’ve broken binary forward compatibility in Kotlin/JS. So, you should update your compiler to 1.1.50 or newer if you want to use libraries compiled with Kotlin/JS 1.1.50, but you can still use libraries compiled with older version of Kotlin compiler (even if you using compiler version 1.1.50 or newer).  

More information is here <https://blog.jetbrains.com/kotlin/2017/09/kotlin-1-1-50-is-out/>

How do I update the Kotlin JS compiler using Gradle Kotlin DSL?

Here is a sample build.gradle.kts file for Kotlin JS: <https://github.com/gradle/kotlin-dsl/blob/18a0b44e98dd6187fb41b4c6230f11173c318fc3/samples/hello-js/build.gradle.kts>

`kotlin` function has optional parameter for that:

```
classpath(kotlin(“gradle-plugin”, “1.1.50"))
```

Already tried that. See the new issue on YouTrack: <https://youtrack.jetbrains.com/issue/KT-20479>