Render stub types properly

compiler/testData/diagnostics/tests/inference/builderInference/renderingStubTypes.fir.kt

@@ -0,0 +1,25 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER -DEPRECATION -EXPERIMENTAL_IS_NOT_ENABLED -UNUSED_VARIABLE
+// WITH_RUNTIME
+
+import kotlin.experimental.ExperimentalTypeInference
+
+@UseExperimental(ExperimentalTypeInference::class)
+fun <R> build(
+    @BuilderInference block: TestInterface<R>.() -> Unit
+): R = TODO()
+
+class Inv<K>
+
+interface TestInterface<R> {
+    fun emit(r: R)
+    fun get(): R
+    fun getInv(): Inv<R>
+}
+
+fun test() {
+    val ret = build {
+        emit(1)
+        get()
+        getInv()
+    }
+}

compiler/testData/diagnostics/tests/inference/builderInference/renderingStubTypes.kt

@@ -0,0 +1,28 @@
+// !DIAGNOSTICS: -UNUSED_PARAMETER -DEPRECATION -EXPERIMENTAL_IS_NOT_ENABLED -UNUSED_VARIABLE
+// WITH_RUNTIME
+
+import kotlin.experimental.ExperimentalTypeInference
+
+@UseExperimental(ExperimentalTypeInference::class)
+fun <R> build(
+    @BuilderInference block: TestInterface<R>.() -> Unit
+): R = TODO()
+
+class Inv<K>
+
+interface TestInterface<R> {
+    fun emit(r: R)
+    fun get(): R
+    fun getInv(): Inv<R>
+}
+
+fun <U> id(x: U) = x
+
+fun test() {
+    val ret = build {
+        emit("1")
+        <!DEBUG_INFO_EXPRESSION_TYPE("TypeVariable(R)")!>get()<!>
+        <!DEBUG_INFO_EXPRESSION_TYPE("Inv<TypeVariable(R)>")!>getInv()<!>
+        ""
+    }
+}

compiler/testData/diagnostics/tests/inference/builderInference/renderingStubTypes.txt

@@ -0,0 +1,21 @@
+package
+
+@kotlin.UseExperimental(markerClass = {kotlin.experimental.ExperimentalTypeInference::class}) public fun </*0*/ R> build(/*0*/ @kotlin.BuilderInference block: TestInterface<R>.() -> kotlin.Unit): R
+public fun </*0*/ U> id(/*0*/ x: U): U
+public fun test(): kotlin.Unit
+
+public final class Inv</*0*/ K> {
+    public constructor Inv</*0*/ K>()
+    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 TestInterface</*0*/ R> {
+    public abstract fun emit(/*0*/ r: R): kotlin.Unit
+    public open override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
+    public abstract fun get(): R
+    public abstract fun getInv(): Inv<R>
+    public open override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
+    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+}