Minor. Add regression test

#KT-45539 Obsolete

compiler/testData/codegen/box/coroutines/kt44710.kt

@@ -0,0 +1,59 @@
+// WITH_RUNTIME
+// KJS_WITH_FULL_RUNTIME
+
+import kotlin.coroutines.*
+
+class WrappedChannel<T>(channel: Channel<T> = Channel()): ReceiveChannel<T> by channel
+
+fun builder(c: suspend () -> Unit) {
+    c.startCoroutine(Continuation(EmptyCoroutineContext) {
+        it.getOrThrow()
+    })
+}
+
+interface Flow<out T> {
+    suspend fun collect(collector: FlowCollector<T>)
+}
+
+interface FlowCollector<in T> {
+    suspend fun emit(value: T)
+}
+
+fun <T> ReceiveChannel<T>.consumeAsFlow(): Flow<T> = ChannelAsFlow(this)
+
+class ChannelAsFlow<T>(
+    private val channel: ReceiveChannel<T>
+): ChannelFlow<T>() {
+    override suspend fun collect(collector: FlowCollector<T>) {
+        collector.emit(channel.receive())
+    }
+}
+
+abstract class ChannelFlow<T>: Flow<T>
+
+var res = "FAIL"
+
+object StringCollector : FlowCollector<String> {
+    override suspend fun emit(value: String) {
+        res = value
+    }
+}
+
+interface ReceiveChannel<out E> {
+    suspend fun receive(): E
+}
+
+interface Channel<E>: ReceiveChannel<E>
+
+fun <E> Channel(): Channel<E> = object : Channel<E> {
+    override suspend fun receive(): E {
+        return "OK" as E
+    }
+}
+
+fun box(): String {
+    builder {
+        WrappedChannel<String>().consumeAsFlow().collect(StringCollector)
+    }
+    return res
+}