diff --git a/compiler/testData/codegen/box/builderInference/issues/kt60447a.kt b/compiler/testData/codegen/box/builderInference/issues/kt60447a.kt
new file mode 100644
index 00000000000..71f2e08b7f0
--- /dev/null
+++ b/compiler/testData/codegen/box/builderInference/issues/kt60447a.kt
@@ -0,0 +1,33 @@
+// ISSUE: KT-60447
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    val buildee = build {
+        class ConcreteType
+        class TargetType {
+            fun consumeConcreteType(value: ConcreteType) {}
+        }
+        setTypeVariableProducerFunction { TargetType() }
+        setTypeVariableConsumerFunction { it.consumeConcreteType(ConcreteType()) }
+    }
+    val targetType = buildee.typeVariableProducer()
+    buildee.typeVariableConsumer(targetType)
+    return "OK"
+}
+
+
+
+
+class Buildee<TV> {
+    var typeVariableConsumer: (TV) -> Unit = {}
+    var typeVariableProducer: () -> TV = { null!! }
+    fun setTypeVariableConsumerFunction(consumer: (TV) -> Unit) { typeVariableConsumer = consumer }
+    fun setTypeVariableProducerFunction(producer: () -> TV) { typeVariableProducer = producer }
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/codegen/box/builderInference/issues/kt60447b.kt b/compiler/testData/codegen/box/builderInference/issues/kt60447b.kt
new file mode 100644
index 00000000000..3955492ca31
--- /dev/null
+++ b/compiler/testData/codegen/box/builderInference/issues/kt60447b.kt
@@ -0,0 +1,34 @@
+// ISSUE: KT-60447
+
+// IGNORE_LIGHT_ANALYSIS
+// IGNORE_BACKEND: ANY
+// REASON: red code (see corresponding diagnostic test)
+
+fun box(): String {
+    val buildee = build {
+        setTypeVariableProducerFunction { TargetType() }
+        setTypeVariableConsumerFunction { it.consumeConcreteType(ConcreteType()) }
+    }
+    val targetType = buildee.typeVariableProducer()
+    buildee.typeVariableConsumer(targetType)
+    return "OK"
+}
+
+
+
+
+class ConcreteType
+class TargetType {
+    fun consumeConcreteType(value: ConcreteType) {}
+}
+
+class Buildee<TV> {
+    var typeVariableConsumer: (TV) -> Unit = {}
+    var typeVariableProducer: () -> TV = { null!! }
+    fun setTypeVariableConsumerFunction(consumer: (TV) -> Unit) { typeVariableConsumer = consumer }
+    fun setTypeVariableProducerFunction(producer: () -> TV) { typeVariableProducer = producer }
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt60447a.fir.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447a.fir.kt
new file mode 100644
index 00000000000..7b4a33d8ca8
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447a.fir.kt
@@ -0,0 +1,30 @@
+// ISSUE: KT-60447
+
+fun test() {
+    val buildee = build {
+        class ConcreteType
+        class TargetType {
+            fun consumeConcreteType(value: ConcreteType) {}
+            fun targetTypeMemberFunction() {}
+        }
+        setTypeVariableProducerFunction { TargetType() }
+        setTypeVariableConsumerFunction { it.<!UNRESOLVED_REFERENCE!>consumeConcreteType<!>(ConcreteType()) }
+    }
+    // local class equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    buildee.typeVariableProducer().targetTypeMemberFunction()
+}
+
+
+
+
+class Buildee<TV> {
+    var typeVariableConsumer: (TV) -> Unit = {}
+    var typeVariableProducer: () -> TV = { null!! }
+    fun setTypeVariableConsumerFunction(consumer: (TV) -> Unit) { typeVariableConsumer = consumer }
+    fun setTypeVariableProducerFunction(producer: () -> TV) { typeVariableProducer = producer }
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt60447a.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447a.kt
new file mode 100644
index 00000000000..5c9d8ace974
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447a.kt
@@ -0,0 +1,30 @@
+// ISSUE: KT-60447
+
+fun test() {
+    val buildee = build {
+        class ConcreteType
+        class TargetType {
+            fun consumeConcreteType(value: ConcreteType) {}
+            fun targetTypeMemberFunction() {}
+        }
+        setTypeVariableProducerFunction { TargetType() }
+        setTypeVariableConsumerFunction { it.<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE, DEBUG_INFO_UNRESOLVED_WITH_TARGET, UNRESOLVED_REFERENCE!>consumeConcreteType<!>(ConcreteType()) }
+    }
+    // local class equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    buildee.typeVariableProducer().targetTypeMemberFunction()
+}
+
+
+
+
+class Buildee<TV> {
+    var typeVariableConsumer: (TV) -> Unit = {}
+    var typeVariableProducer: () -> TV = { null!! }
+    fun setTypeVariableConsumerFunction(consumer: (TV) -> Unit) { typeVariableConsumer = consumer }
+    fun setTypeVariableProducerFunction(producer: () -> TV) { typeVariableProducer = producer }
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt60447b.fir.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447b.fir.kt
new file mode 100644
index 00000000000..a1197b2792f
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447b.fir.kt
@@ -0,0 +1,31 @@
+// ISSUE: KT-60447
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val buildee = build {
+        setTypeVariableProducerFunction { TargetType() }
+        setTypeVariableConsumerFunction { it.<!UNRESOLVED_REFERENCE!>consumeConcreteType<!>(ConcreteType()) }
+    }
+    // exact type equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    checkExactType<Buildee<TargetType>>(buildee)
+}
+
+
+
+
+class ConcreteType
+class TargetType {
+    fun consumeConcreteType(value: ConcreteType) {}
+}
+
+class Buildee<TV> {
+    var typeVariableConsumer: (TV) -> Unit = {}
+    var typeVariableProducer: () -> TV = { null!! }
+    fun setTypeVariableConsumerFunction(consumer: (TV) -> Unit) { typeVariableConsumer = consumer }
+    fun setTypeVariableProducerFunction(producer: () -> TV) { typeVariableProducer = producer }
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}
diff --git a/compiler/testData/diagnostics/tests/builderInference/issues/kt60447b.kt b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447b.kt
new file mode 100644
index 00000000000..f2af8f000e2
--- /dev/null
+++ b/compiler/testData/diagnostics/tests/builderInference/issues/kt60447b.kt
@@ -0,0 +1,31 @@
+// ISSUE: KT-60447
+// CHECK_TYPE_WITH_EXACT
+
+fun test() {
+    val buildee = build {
+        setTypeVariableProducerFunction { TargetType() }
+        setTypeVariableConsumerFunction { it.<!DEBUG_INFO_ELEMENT_WITH_ERROR_TYPE, DEBUG_INFO_UNRESOLVED_WITH_TARGET, UNRESOLVED_REFERENCE!>consumeConcreteType<!>(ConcreteType()) }
+    }
+    // exact type equality check — turns unexpected compile-time behavior into red code
+    // considered to be non-user-reproducible code for the purposes of these tests
+    checkExactType<Buildee<TargetType>>(buildee)
+}
+
+
+
+
+class ConcreteType
+class TargetType {
+    fun consumeConcreteType(value: ConcreteType) {}
+}
+
+class Buildee<TV> {
+    var typeVariableConsumer: (TV) -> Unit = {}
+    var typeVariableProducer: () -> TV = { null!! }
+    fun setTypeVariableConsumerFunction(consumer: (TV) -> Unit) { typeVariableConsumer = consumer }
+    fun setTypeVariableProducerFunction(producer: () -> TV) { typeVariableProducer = producer }
+}
+
+fun <PTV> build(instructions: Buildee<PTV>.() -> Unit): Buildee<PTV> {
+    return Buildee<PTV>().apply(instructions)
+}