<@U0ZFBBUBU> It looks like all you need is to call this top level fun to create your handler instanc...

# coroutines

[dave08]

@groostav It looks like all you need is to call this top level fun to create your handler instance (it's in the core lib.):

public actual inline fun CoroutineExceptionHandler(crossinline handler: (CoroutineContext, Throwable) -> Unit): CoroutineExceptionHandler =
    object: AbstractCoroutineContextElement(CoroutineExceptionHandler), CoroutineExceptionHandler {
        override fun handleException(context: CoroutineContext, exception: Throwable) =
            handler.invoke(context, exception)
    }

I think you were missing the CoroutineContext's element key companion object, which is what replaces your context with the default one in the lib, but the above should do the trick...

[groostav]

this function is a factory, I was using an alternative strategy to create it, but in either event, it never gets called. If i call this function, assign it to handler, and then do runBlocking(Handler) it still doesnt get called

[groostav]

does it maybe have to do with the runBlocking builder, where the exception-handler only gets notified on launch blocks?

[dave08]

Oh, I think that 0.22 ignores contexts in runBlocking, but I think 0.22.1 it was fixed... (for the dispatcher part, not sure about error handlers...)

[dave08]

But in the source code (even old), it seems just to add contexts, not ignore them... I'd first update to 0.22.1 and maybe try withContext, maybe that'll help?