Guys, I think I found a bug in Intellij + Kotlin. I reported it here: https://youtrack.jetbrains.com/issue/KT-29435

Looks like you're using Apache Spark? This happens a lot unfortunately, I've reported at least 2 such issues, all of which were resolved fairly quickly.

Do you have any idea why this happens, or a workaround?

Here's the issues I reported: https://youtrack.jetbrains.com/issue/KT-14323 https://youtrack.jetbrains.com/issue/KT-14375 Both of which have been resolved, but you definitely aren't crazy!

that's harsh