[NI] Fix exception on capturing stub type from coroutine-inference

#KT-30853 Fixed

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

@@ -0,0 +1,19 @@
+// !LANGUAGE: +NewInference
+// !DIAGNOSTICS: -UNUSED_PARAMETER
+// !USE_EXPERIMENTAL: kotlin.Experimental
+
+import kotlin.experimental.ExperimentalTypeInference
+
+suspend fun main() {
+    iFlow { emit(1) }
+}
+
+
+@UseExperimental(ExperimentalTypeInference::class)
+fun <K> iFlow(@BuilderInference block: suspend iFlowCollector<in K>.() -> Unit): iFlow<K> = TODO()
+
+interface iFlowCollector<S> {
+    suspend fun emit(value: S)
+}
+
+interface iFlow<out V>

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

@@ -0,0 +1,17 @@
+package
+
+@kotlin.UseExperimental(markerClass = {kotlin.experimental.ExperimentalTypeInference::class}) public fun </*0*/ K> iFlow(/*0*/ @kotlin.BuilderInference block: suspend iFlowCollector<in K>.() -> kotlin.Unit): iFlow<K>
+public suspend fun main(): kotlin.Unit
+
+public interface iFlow</*0*/ out V> {
+    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 iFlowCollector</*0*/ S> {
+    public abstract suspend fun emit(/*0*/ value: S): kotlin.Unit
+    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
+}