Hello everyone, has anyone had any issues related ...

# coroutines

[Joaquim Ley]

Hello everyone, has anyone had any issues related to coroutines/ktor/multiplatform?

So when using the 1.3.9-native-mt-2 it works on iOS but not for Android
• const val kotlinCoroutines = “1.3.9-native-mt-2”
With 1.4.0-M1 works for android but not iOS
• const val kotlinCoroutines = “1.4.0-M1"

[cy]

How exactly it is not working? Could you please briefly describe?

[Joaquim Ley]

Sorry I’ll give more context, give me a minute to write it out

[Joaquim Ley]

Versions.kotlinCoroutines = 1.3.9-native-mt-2

val commonMain by getting {
 dependencies {
                // Coroutines
                implementation ("org.jetbrains.kotlinx:kotlinx-coroutines-core:${Versions.kotlinCoroutines}") {
                    version {
                        strictly(Versions.kotlinCoroutines)
                    }
                }
(...)
}

• This works fine I can make http requests on iOS, I only have the kto-client-ios dependency on the iosMain
But if I try to build on Android with the same versions it won’t compile:

Execution failed for task ':android:checkDebugAarMetadata'.
> Could not resolve all files for configuration ':android:debugRuntimeClasspath'.
   > Could not resolve org.jetbrains.kotlinx:kotlinx-coroutines-core:{strictly 1.3.9-native-mt-2}.
     Required by:
         project :android > project :shared
      > Cannot find a version of 'org.jetbrains.kotlinx:kotlinx-coroutines-core' that satisfies the version constraints:
           Dependency path 'com.<--->:android:unspecified' --> 'com.'<--->:shared:1.0-SNAPSHOT' --> 'org.jetbrains.kotlinx:kotlinx-coroutines-core:{strictly 1.3.9-native-mt-2}'

[Joaquim Ley]

• Cannot find a version of ‘org.jetbrains.kotlinx:kotlinx-coroutines-core’ that satisfies the version constraints:  ☝️

[Joaquim Ley]

And if I switch the kotlinCourtines version to 1.4.0-M1 compiles just fine for both android and iOS, but when making a http request on the later, I get the freeze error:

Error(message=mutation attempt of frozen kotlinx.coroutines.ChildHandleNode@3516608)

[Joaquim Ley]

PS: Sorry it took so long I had to clean and rebuild, for a moment it worked on both but that’s because iOS was cached on 1.3.9-mt-2 and android was on 1.4.0-m1

[Joaquim Ley]

Some more info on other versions:

const val androidGradlePlugin = "4.2.0-alpha13"
    const val kotlin = "1.4.10"
    const val kotlinCompiler= "1.4.0"
    const val kotlinCoroutines = "1.4.0-M1" // OR "1.3.9-native-mt-2"
    const val ktor = "1.4.0"
    const val kotlinxSerialization = "1.0.0-RC"

[Joaquim Ley]

@cy let me know if I can provide any more info

[Joaquim Ley]

Thanks to @John O'Reilly’s People in Space repo I noticed he commited a cleaup but stil kept isForce instead of strictely, so the workaround for now is:

val commonMain by getting {
            dependencies {
                // Coroutines
                implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:${Versions.kotlinCoroutines}") {
                    isForce = true
                }
(...)

I spent a good 6hours to get this to finally working but now I only have swift on actual SwiftUI and I’m able to write ViewModels in kotlin for ios and android

[John O'Reilly]

@Joaquim Ley I actually had meant to commit the update to use strictly instead of isForce....wasn't clear on this issue but are you saying that using that causes a problem?

[Joaquim Ley]

Yes, it took my whole sunday to get this.. As I mentioned on Twitter, I’ve based a lot of my project on your PiS project but I wanted to write my viewmodels in Kotlin. I had some issues setting up ktor with iOS and eventually came to this. It should however work fine if you use Swift to call the repository

[John O'Reilly]

but strictly and isForce should do the same thing as I understand it.....I had meant to update to the former as that seemed to be the recommended approach now

[John O'Reilly]

I'm still using v 1.3.9-native-mt of kotlinx coroutines btw primarily because of https://youtrack.jetbrains.com/issue/KTOR-1087

[Joaquim Ley]

It should be the same but I got it working finally, android is on 1.4-m2 and common on native-mt-2 and it is working finally 🙏