I’m trying to include Coroutines 1.3.0-M1 with Kotlin 1.3.40 in my project. Coroutines 1.3.0-M1 is n...

# kotlin-native

[Thomas]

I’m trying to include Coroutines 1.3.0-M1 with Kotlin 1.3.40 in my project. Coroutines 1.3.0-M1 is not based on 1.3.40 so I need to build it manually. I successfully built coroutines and published it to maven local. However, the generated objective C framework has the following error (my module is named common):

Cannot find protocol declaration for 'CommonKotlinCoroutineContextElement'; did you mean 'CommonKotlinCoroutineContextKey'?

This is the part where it shows the error:

__attribute__((swift_name("KotlinCoroutineContext")))
@protocol CommonKotlinCoroutineContext
@required
- (id _Nullable)foldInitial:(id _Nullable)initial operation:(id _Nullable (^)(id _Nullable, id<CommonKotlinCoroutineContextElement>))operation __attribute__((swift_name("fold(initial:operation:)")));
- (id<CommonKotlinCoroutineContextElement> _Nullable)getKey:(id<CommonKotlinCoroutineContextKey>)key __attribute__((swift_name("get(key:)")));
- (id<CommonKotlinCoroutineContext>)minusKeyKey:(id<CommonKotlinCoroutineContextKey>)key __attribute__((swift_name("minusKey(key:)")));
- (id<CommonKotlinCoroutineContext>)plusContext:(id<CommonKotlinCoroutineContext>)context __attribute__((swift_name("plus(context:)")));
@end;

Could anyone here point me in the right direction what could be wrong?

[elizarov]

Use version 1.2.2. The updated 1.3.0 milestone will come a bit later.

[Thomas]

Great, that will work for now. Thank you!

[Thomas]

@elizarov I tried version 1.2.2 but unfortunately that gives the same error

[elizarov]

Seems like K/N bug to me 😞

[svyatoslav.scherbina]

Thanks, confirmed.

[svyatoslav.scherbina]

Adding

class Workaround {
    fun workaround(element: kotlin.coroutines.CoroutineContext.Element) {}
}

to your Kotlin code may help to workaround the issue. Does it?

[svyatoslav.scherbina]

(to be added preferably to root package)

[Thomas]

@svyatoslav.scherbina Can confirm the workaround works, but only if it is added to the root package. It is really amazing how quickly you fix the issues!

[svyatoslav.scherbina]

It would be even more amazing if we didn’t make the issues 🙂

[ribesg]

I can also confirm the workaround worked for me. Is there an issue somewhere we can track to see when this is fixed and we can remove the workaround @svyatoslav.scherbina?

[svyatoslav.scherbina]

The issue is already fixed: https://github.com/JetBrains/kotlin-native/pull/3088
The fix will be delivered within the nearest release.

[ribesg]

Thanks