I use features that require `ExperimentalStdlibApi`, and I add it via Gradle plugin that adds `-Xopt...

# intellij

[Karlo Lozovina]

I use features that require ExperimentalStdlibApi, and I add it via Gradle plugin that adds -Xopt-in=kotlin.ExperimentalStdlibApi to kotlinOptions.freeCompilerArgs. Building with Gradle from the command line shows no errors, but Intellij keeps underlining functions (like buildList) and saying that I need to add the annotation. Using the latest Kotlin 1.6 preview plugin. Any ideas what to try to fix it?

[Karlo Lozovina]

It doesn't even underline those buildLists as errors until I open the file... not even after building the project. Weird...

[Karlo Lozovina]

Interesting, now Intellij no longer understands JvmInline annotations...

[Karlo Lozovina]

Switched to Gradle Kotlin plugin 1.6 ... now buildList is just unresolved reference 😄 from bad to worse, it seems 😄

[Karlo Lozovina]

It seems everything I do inside the Gradle buildSrc plugin (enable experimental apis, add serialization, etc...) Intellij fails to understand, now basically nothing works

[Karlo Lozovina]

And now I'm basically using Intellij as a slow Notepad 🤣

[ankushg]

https://kotlinlang.org/docs/mpp-dsl-reference.html#language-settings

what happens if you use languageSettings? Maybe the IDE has better support for the gradle DSL instead of compiler args?

I think docs are outdated though: the useExperimentalAnnotation method is deprecated and replaced with optIn

[Jan Skrasek]

idea EAP? it's a bug.

[Karlo Lozovina]

@ankushg thanks for the suggestion, here is the complete configuration block (I'm not using multiplatform):

tasks {
    compileKotlin {
        kotlinOptions.languageVersion = "1.5"
        kotlinOptions.apiVersion = "1.5"
        kotlinOptions.jvmTarget = "16"
        kotlinOptions.freeCompilerArgs = listOf(
            "-Xopt-in=kotlin.ExperimentalStdlibApi",
            "-Xopt-in=kotlin.time.ExperimentalTime",
            "-Xopt-in=kotlin.contracts.ExperimentalContracts",
        )
    }
}

It's not EAP, I'm using 2021.2.3 ... I'll try to reproduce it later on a minimal example