[FE 1.0] Continue completion of calls inside that builder inference call postponed type variables of which has already been inferred

compiler/testData/diagnostics/tests/inference/builderInference/kt49285.fir.kt

@@ -0,0 +1,20 @@
+// WITH_STDLIB
+
+import kotlin.experimental.ExperimentalTypeInference
+
+class Foo<T> {
+    fun add(x: T) {}
+}
+
+@OptIn(ExperimentalTypeInference::class)
+fun <K1> myBuilder1(@BuilderInference builder: Foo<K1>.() -> Foo<K1>): Foo<K1> = Foo<K1>().apply { builder() }
+
+@OptIn(ExperimentalTypeInference::class)
+fun <K2> myBuilder2(@BuilderInference builder: Foo<K2>.() -> Unit): Foo<K2> = Foo<K2>().apply(builder)
+
+val result1 = myBuilder1 {
+    add(null)
+    myBuilder2 {
+        add(<!ARGUMENT_TYPE_MISMATCH!>""<!>)
+    }
+}

compiler/testData/diagnostics/tests/inference/builderInference/kt49285.kt

@@ -0,0 +1,20 @@
+// WITH_STDLIB
+
+import kotlin.experimental.ExperimentalTypeInference
+
+class Foo<T> {
+    fun add(x: T) {}
+}
+
+@OptIn(ExperimentalTypeInference::class)
+fun <K1> myBuilder1(@BuilderInference builder: Foo<K1>.() -> Foo<K1>): Foo<K1> = Foo<K1>().apply { builder() }
+
+@OptIn(ExperimentalTypeInference::class)
+fun <K2> myBuilder2(@BuilderInference builder: Foo<K2>.() -> Unit): Foo<K2> = Foo<K2>().apply(builder)
+
+val result1 = myBuilder1 {
+    add(null)
+    myBuilder2 {
+        add(<!TYPE_MISMATCH!>""<!>)
+    }
+}

compiler/testData/diagnostics/tests/inference/builderInference/kt49285.txt

@@ -0,0 +1,13 @@
+package
+
+public val result1: Foo<kotlin.Nothing?>
+@kotlin.OptIn(markerClass = {kotlin.experimental.ExperimentalTypeInference::class}) public fun </*0*/ K1> myBuilder1(/*0*/ @kotlin.BuilderInference builder: Foo<K1>.() -> Foo<K1>): Foo<K1>
+@kotlin.OptIn(markerClass = {kotlin.experimental.ExperimentalTypeInference::class}) public fun </*0*/ K2> myBuilder2(/*0*/ @kotlin.BuilderInference builder: Foo<K2>.() -> kotlin.Unit): Foo<K2>
+
+public final class Foo</*0*/ T> {
+    public constructor Foo</*0*/ T>()
+    public final fun add(/*0*/ x: T): 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
+}