I updated my MP project which uses Ktor and coroutines to 1.4.0. I am getting this failure: ```Uncau...

# coroutines

[tylerwilson]

I updated my MP project which uses Ktor and coroutines to 1.4.0. I am getting this failure:

Uncaught Kotlin exception: kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlinx.coroutines.ChildHandleNode@7eec8

Anybody have any clues where to look? This same code worked in previous version…

[tylerwilson]

And the call stack

Untitled

[tylerwilson]

Okay, I finally got it: I was using coroutines 1.3.9 but looking here: https://github.com/ktorio/ktor/blob/master/gradle.properties and noting the version Ktor uses. I use the same, and it is now working. What threw me off was that this also works for JVM/Android, which I had not expected.

[Michal Harakal]

I guess you will get an better answer in the #multiplatform channel and I guess has something to do with multihtreded version of couroutines, which ktor uses

[Michal Harakal]

Also see here https://kotlinlang.slack.com/archives/C1CFAFJSK/p1597886480055300