I've been using the new context parameter function...

# compiler

[James Yox]

I've been using the new context parameter functionality a lot but noticed something that seems like a compiler bug to me. I keep getting com.android.tools.r8.internal.Yf: Field name '$$context-FlowCollector#1' cannot be represented in dex format. but only on the android target (makes sense since this appears related to dexing). I am guessing that at some point the # is being used for a param name which dex doesn't like. Simple reproducer in thread.

[James Yox]

fun beginTest() {
    context(
        FlowCollector<Throwable> { it.printStackTrace() },
        FlowCollector<SomeType> { }
    ) {
        CoroutineScope(<http://Dispatchers.IO|Dispatchers.IO>).launch {
            test()
        }
    }
}


context(
    one: FlowCollector<Throwable>,
    two: FlowCollector<SomeType>
)
fun test() {
    println(one)
    println(two)
}

data object SomeType

[James Yox]

Funny behavior. If I move the coroutine scope above all the context calls, it does compile:

fun beginTest() {
    CoroutineScope(<http://Dispatchers.IO|Dispatchers.IO>).launch {
        context(
            FlowCollector<Throwable> { it.printStackTrace() },
            FlowCollector<SomeType> { }
        ) {
            test()
        }
    }
}

[dmitriy.novozhilov]

Could you please report an issue?

[James Yox]

Can do

[James Yox]

https://youtrack.jetbrains.com/issue/KT-85199/Context-parameters-can-cause-field-names-that-cannot-be-represented-in-dex-format

Done. Attached a sample android project as well.