Kotlinx.coroutines: 0.30.1 requires kotlin 1.3 - is this intentional?

[ZakTaccardi]

I am getting an error when upgrading from kotlin 0.30.0 to 0.30.1.

Could not resolve all files for configuration ':testing:login:debugCompileClasspath'.
> Could not find org.jetbrains.kotlin:kotlin-stdlib-common:1.3.0-rc-131.
  Searched in the following locations:
  - <omitted because internal maven repo>
Required by:
      project :testing:login > org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.2.71 > org.jetbrains.kotlin:kotlin-stdlib:1.2.71
> Could not find org.jetbrains.kotlin:kotlin-stdlib-common:1.3.0-rc-131.
  Searched in the following locations:
  - <omitted because internal maven repo>
Required by:
      project :testing:login > org.jetbrains.kotlinx:kotlinx-coroutines-core:0.30.1 > org.jetbrains.kotlinx:kotlinx-coroutines-core-common:0.30.1
> Could not find org.jetbrains.kotlin:kotlin-stdlib-common:1.3.0-rc-131.
  Searched in the following locations:
  - <omitted because internal maven repo>
Required by:
      project :testing:login > org.jetbrains.kotlinx:kotlinx-coroutines-core:0.30.1 > org.jetbrains.kotlinx:kotlinx-coroutines-core-common:0.30.1 > org.jetbrains.kotlinx:atomicfu-common:0.11.10

Why does 0.30.1 require kotlin 1.3, but 0.30.0 does not. Is this intentional?

Note: I do not want to use 1.3 at all, and currently want to stay on a 1.2.x version.

[maxcruz]

I have the same problem with my project. What is the last version compatible with Kotlin 1.2.71?

[chistoff]

I have the same problem with my project. What is the last version compatible with Kotlin 1.2.71?

0.30.0

[elizarov]

It _is_ compatible and it is not intentional. It is an accidental leak of dependencies. You workaround it in this way in your dependencies section:

compile("org.jetbrains.kotlinx:kotlinx-coroutines-core:$coroutines_version") {
    exclude group: "org.jetbrains.kotlinx", module: "atomicfu-common"
}