[NI] Fix composite substitution for stubbed type in builder-inference

#KT-32038 Fixed

compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/twoReceiversInScope.kt

@@ -0,0 +1,29 @@
+// !USE_EXPERIMENTAL: kotlin.Experimental
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+
+@file:UseExperimental(ExperimentalTypeInference::class)
+
+import kotlin.experimental.ExperimentalTypeInference
+
+interface MyFlow<out T>
+interface MyFlowCollector<in T>
+
+fun <F> flow(@BuilderInference block: MyFlowCollector<F>.() -> Unit): MyFlow<F> = TODO()
+
+interface SendChannel<in E> {
+    fun send(element: E)
+}
+
+fun <P> produce(@BuilderInference block: SendChannel<P>.() -> Unit) {}
+
+fun <C> MyFlow<C>.collect(action: (C) -> Unit) {}
+
+private fun <T> MyFlow<T>.idScoped(): MyFlow<T> {
+    return flow {
+        produce {
+            collect {
+                send(it)
+            }
+        }
+    }
+}

compiler/testData/diagnostics/testsWithStdLib/coroutines/inference/twoReceiversInScope.txt

@@ -0,0 +1,25 @@
+package
+
+public fun </*0*/ F> flow(/*0*/ @kotlin.BuilderInference block: MyFlowCollector<F>.() -> kotlin.Unit): MyFlow<F>
+public fun </*0*/ P> produce(/*0*/ @kotlin.BuilderInference block: SendChannel<P>.() -> kotlin.Unit): kotlin.Unit
+public fun </*0*/ C> MyFlow<C>.collect(/*0*/ action: (C) -> kotlin.Unit): kotlin.Unit
+private fun </*0*/ T> MyFlow<T>.idScoped(): MyFlow<T>
+
+public interface MyFlow</*0*/ out T> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface MyFlowCollector</*0*/ in T> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}
+
+public interface SendChannel</*0*/ in E> {
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public abstract fun send(/*0*/ element: E): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}