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kotlinlang

`w: Language version 1.8 is deprecated and its support will be removed in a future version of Kotlin`

Looks like this is already on the table. What's the plan for moving off of 1.8 as the minimum supported version?

Not sure, but I've heard that the K1 compiler is staying for a year, hence 1.9 is staying for a year at least

Yeah 1.8 is already gone in Kotlin 2.3. Bumped all our Gradle plugins to target 2.2 instead which is what's in Gradle 9.

Oh you're talking about JVM bytecode version?

I thought this was Kotlin api/language version

I'm confused now. What is this message saying?

It's saying *Kotlin* version 1.8 is deprecated. The compiler has the capability to compile code with a previous Kotlin version.

Is it warning me that I have version 1.8 output configured in my project, or is it just a generic warning?

It would only show this if you configured an api/language version of 1.8

Where is that configured? Not seeing anything with "8" in my `build.gradle.kts`

`languageVersion = KotlinVersion.KOTLIN_1_8` somewhere

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Not seeing `languageVersion` anywhere in my project

Not sure then. You see the warning when doing a normal build? The IDE? Somewhere else?

With the `--debug` flag, it looks like it's coming from a module that is a Gradle plugin

So maybe one of these dependencies is bringing in its own language version?

The warning is printed in terminal on a full clean build

I don't even remember why I have `kotlin-dsl` and `groovy` in there

Just removed them, and the warning is gone :man-shrugging:

The `kotlin-dsl` is probably setting it to 1.8 since that was the language version supported by Gradle 8

I thought this was about dropping support for Java 8 at the bytecode level

`kotlin-dsl` uses 1.8 as the Kotlin language version (for Gradle &lt; 9.x), by default, though you could set it to 1.9/2.0 (following the <https://docs.gradle.org/current/userguide/compatibility.html#kotlin|compatibility matrix>)