diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Boxing.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Boxing.kt
index bc8a9943d11..df1ac4efaab 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Boxing.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Boxing.kt
@@ -73,7 +73,8 @@ internal val Context.getBoxFunction: (IrClass) -> IrSimpleFunction by Context.la
             isTailrec = false,
             isSuspend = false,
             isExpect = false,
-            isFakeOverride = false
+            isFakeOverride = false,
+            isOperator = false
     ).also { function ->
         function.valueParameters.add(WrappedValueParameterDescriptor().let {
             IrValueParameterImpl(
@@ -126,7 +127,8 @@ internal val Context.getUnboxFunction: (IrClass) -> IrSimpleFunction by Context.
             isTailrec = false,
             isSuspend = false,
             isExpect = false,
-            isFakeOverride = false
+            isFakeOverride = false,
+            isOperator = false
     ).also { function ->
         function.valueParameters.add(WrappedValueParameterDescriptor().let {
             IrValueParameterImpl(
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt
index 90b5e7bea68..16aca5f1831 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/Context.kt
@@ -141,7 +141,8 @@ internal class SpecialDeclarationsFactory(val context: Context) : KotlinMangler
                 isSuspend = function.isSuspend,
                 returnType = returnType,
                 isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false,
+                isOperator = false
         ).apply {
             descriptor.bind(this)
             parent = function.parent
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EntryPoint.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EntryPoint.kt
index 3c27cdb83e4..b2a6d160417 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EntryPoint.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EntryPoint.kt
@@ -41,7 +41,8 @@ internal fun makeEntryPoint(context: Context): IrFunction {
             isTailrec = false,
             isSuspend = false,
             isExpect = false,
-            isFakeOverride = false
+            isFakeOverride = false,
+            isOperator = false
     ).also { function ->
         function.valueParameters.add(WrappedValueParameterDescriptor().let {
             IrValueParameterImpl(
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EnumSpecialDescriptorsFactory.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EnumSpecialDescriptorsFactory.kt
index ace1ae06f42..ad1d2d6d189 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EnumSpecialDescriptorsFactory.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/EnumSpecialDescriptorsFactory.kt
@@ -98,7 +98,8 @@ internal class EnumSpecialDeclarationsFactory(val context: Context) {
                     isTailrec = false,
                     isSuspend = false,
                     isExpect = false,
-                    isFakeOverride = false
+                    isFakeOverride = false,
+                    isOperator = false
             ).apply {
                 it.bind(this)
                 parent = implObject
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt
index 72d2fe638a1..b3705091cdb 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGen.kt
@@ -569,7 +569,8 @@ private fun KotlinStubs.createFakeKotlinExternalFunction(
             isTailrec = false,
             isSuspend = false,
             isExpect = false,
-            isFakeOverride = false
+            isFakeOverride = false,
+            isOperator = false
     )
     bridgeDescriptor.bind(bridge)
 
@@ -1269,7 +1270,7 @@ private class ObjCBlockPointerValuePassing(
                 Visibilities.PUBLIC, Modality.FINAL,
                 returnType = functionType.arguments.last().typeOrNull!!,
                 isInline = false, isExternal = false, isTailrec = false, isSuspend = false, isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false, isOperator = false
         )
         invokeMethodDescriptor.bind(invokeMethod)
         invokeMethod.overriddenSymbols += overriddenInvokeMethod.symbol
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGenUtils.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGenUtils.kt
index b4957efef54..ca0af6c4ce7 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGenUtils.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/cgen/CBridgeGenUtils.kt
@@ -117,7 +117,8 @@ private fun createKotlinBridge(
             isTailrec = false,
             isSuspend = false,
             isExpect = false,
-            isFakeOverride = false
+            isFakeOverride = false,
+            isOperator = false
     )
     bridgeDescriptor.bind(bridge)
     if (isExternal) {
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt
index 6c3f2574988..eb9a15f058d 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/Autoboxing.kt
@@ -504,7 +504,8 @@ private val Context.getLoweredInlineClassConstructor: (IrConstructor) -> IrSimpl
             isSuspend = false,
             returnType = irConstructor.returnType,
             isExpect = false,
-            isFakeOverride = false
+            isFakeOverride = false,
+            isOperator = false
     ).apply {
         descriptor.bind(this)
         parent = irConstructor.parent
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/BridgesBuilding.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/BridgesBuilding.kt
index 0276765aeeb..3162e38dca8 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/BridgesBuilding.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/BridgesBuilding.kt
@@ -81,7 +81,8 @@ internal class WorkersBridgesBuilding(val context: Context) : DeclarationContain
                                 isSuspend = false,
                                 returnType = context.irBuiltIns.anyNType,
                                 isExpect = false,
-                                isFakeOverride = false
+                                isFakeOverride = false,
+                                isOperator = false
                     ).apply {
                             it.bind(this)
                         }
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/CallableReferenceLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/CallableReferenceLowering.kt
index fa609ca7a12..82d8b4fb27c 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/CallableReferenceLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/CallableReferenceLowering.kt
@@ -312,7 +312,8 @@ internal class CallableReferenceLowering(val context: Context): FileLoweringPass
                     isTailrec = false,
                     isSuspend = superFunction.isSuspend,
                     isExpect = false,
-                    isFakeOverride = false
+                    isFakeOverride = false,
+                    isOperator = false
             ).apply {
                 it.bind(this)
                 val function = this
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FinallyBlocksLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FinallyBlocksLowering.kt
index 37ad700b0ed..907498c7e57 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FinallyBlocksLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/FinallyBlocksLowering.kt
@@ -188,6 +188,7 @@ internal class FinallyBlocksLowering(val context: Context): FileLoweringPass, Ir
                 false,
                 false,
                 false,
+                false,
                 false)
         )
         return descriptor
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InitializersLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InitializersLowering.kt
index d69292b5d32..6a1b4815dc0 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InitializersLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InitializersLowering.kt
@@ -109,7 +109,8 @@ internal class InitializersLowering(val context: CommonBackendContext) : ClassLo
                         isExternal = false,
                         isTailrec = false,
                         isExpect = false,
-                        isFakeOverride = false
+                        isFakeOverride = false,
+                        isOperator = false
                 ).apply {
                     it.bind(this)
                     parent = irClass
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt
index f3316a80a8f..f0394aef758 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/InteropLowering.kt
@@ -234,7 +234,8 @@ internal class InteropLoweringPart1(val context: Context) : BaseInteropIrTransfo
                 isTailrec = false,
                 isSuspend = false,
                 isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false,
+                isOperator = false
         ).also { result ->
             resultDescriptor.bind(result)
             result.parent = irClass
@@ -377,7 +378,8 @@ internal class InteropLoweringPart1(val context: Context) : BaseInteropIrTransfo
                     isTailrec = false,
                     isSuspend = false,
                     isExpect = false,
-                    isFakeOverride = false
+                    isFakeOverride = false,
+                    isOperator = false
             ).apply {
                 it.bind(this)
             }
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/NativeSuspendFunctionLowering.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/NativeSuspendFunctionLowering.kt
index a5acbaba02b..caa56f38275 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/NativeSuspendFunctionLowering.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/NativeSuspendFunctionLowering.kt
@@ -489,7 +489,8 @@ internal class NativeSuspendFunctionsLowering(ctx: Context): AbstractSuspendFunc
                 isTailrec = false,
                 isSuspend = false,
                 isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false,
+                isOperator = false
         ).apply {
             it.bind(this)
         }
@@ -509,7 +510,8 @@ internal class NativeSuspendFunctionsLowering(ctx: Context): AbstractSuspendFunc
                 isTailrec = false,
                 isSuspend = false,
                 isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false,
+                isOperator = false
         ).apply {
             it.bind(this)
         }
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/TestProcessor.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/TestProcessor.kt
index 872305770a1..9fee680b00e 100644
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/TestProcessor.kt
+++ b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/lower/TestProcessor.kt
@@ -349,7 +349,8 @@ internal class TestProcessor (val context: Context) {
                 isTailrec = false,
                 isSuspend = false,
                 isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false,
+                isOperator = false
         ).apply {
             descriptor.bind(this)
             parent = owner
@@ -387,7 +388,8 @@ internal class TestProcessor (val context: Context) {
                 isTailrec = false,
                 isSuspend = false,
                 isExpect = false,
-                isFakeOverride = false
+                isFakeOverride = false,
+                isOperator = false
         ).apply {
             descriptor.bind(this)
             parent = owner
diff --git a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/CapturedTypes.kt b/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/CapturedTypes.kt
deleted file mode 100644
index 4616a2ef710..00000000000
--- a/backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/konan/serialization/CapturedTypes.kt
+++ /dev/null
@@ -1,64 +0,0 @@
-/*
- * Copyright 2010-2018 JetBrains s.r.o. Use of this source code is governed by the Apache 2.0 license
- * that can be found in the LICENSE file.
- */
-
-package org.jetbrains.kotlin.backend.konan.serialization
-
-import org.jetbrains.kotlin.descriptors.annotations.Annotations
-import org.jetbrains.kotlin.descriptors.impl.*
-import org.jetbrains.kotlin.descriptors.*
-import org.jetbrains.kotlin.name.*
-import org.jetbrains.kotlin.types.*
-import org.jetbrains.kotlin.resolve.calls.inference.*
-import org.jetbrains.kotlin.storage.LockBasedStorageManager
-
-private val konanInternalPackageName = FqName("kotlin.native.internal")
-private val fakeCapturedTypeClassName = Name.identifier("FAKE_CAPTURED_TYPE_CLASS")
-
-internal fun createFakeClass(packageName: FqName, className: Name)
-    = MutableClassDescriptor(
-        EmptyPackageFragmentDescriptor(
-            ErrorUtils.getErrorModule(), 
-            packageName
-        ),
-        ClassKind.INTERFACE, 
-        /* isInner = */ false, 
-        /* isExternal = */ false,
-        className,
-        SourceElement.NO_SOURCE,
-        LockBasedStorageManager.NO_LOCKS
-    )
-
-// We do the trick similar to FAKE_CONTINUATION_CLASS_DESCRIPTOR.
-// To pack a captured type constructor as a type parameter
-// of a fake class. We need it because type serialization
-// protobuf is not expressive enough.
-private val FAKE_CAPTURED_TYPE_CLASS_DESCRIPTOR 
-    = createFakeClass(konanInternalPackageName, fakeCapturedTypeClassName)
-        .apply {
-            modality = Modality.ABSTRACT
-            visibility = Visibilities.PUBLIC
-            setTypeParameterDescriptors(
-                TypeParameterDescriptorImpl
-                    .createWithDefaultBound(
-                        this, Annotations.EMPTY, 
-                        false, Variance.IN_VARIANCE, 
-                        Name.identifier("Projection"), 
-                        /* index = */ 0,
-                        LockBasedStorageManager.NO_LOCKS
-                    ).let(::listOf)
-            )
-            createTypeConstructor()
-        }
-
-internal fun packCapturedType(type: CapturedType): SimpleType =
-    KotlinTypeFactory.simpleType(
-        Annotations.EMPTY,
-        FAKE_CAPTURED_TYPE_CLASS_DESCRIPTOR.typeConstructor,
-        listOf(type.typeProjection), 
-        nullable = false
-    )
-
-internal fun unpackCapturedType(type: KotlinType)
-    = createCapturedType(type.arguments.single())