Updated testdata to a new generation strategy

Fix IR generation problems

(partially reverts cd931796bc)

Regenerate diagnostic testdata according to runtime changes

plugins/kotlin-serialization/kotlin-serialization-compiler/build.gradle.kts

@@ -21,7 +21,7 @@ dependencies {
 
     testCompile(projectTests(":compiler:tests-common"))
     testCompile(commonDep("junit:junit"))
-    testCompile("org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.11.0")
+    testImplementation("org.jetbrains.kotlinx:kotlinx-serialization-runtime:0.20.0-1.4.0-dev-5730") { isTransitive = false }
 
     testRuntimeOnly(intellijCoreDep()) { includeJars("intellij-core") }
 

plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/GeneratorHelpers.kt

@@ -283,9 +283,9 @@ interface IrBuilderExtension {
         }
         val fieldSymbol = irProperty.backingField!!.symbol
         irProperty.getter = propertyDescriptor.getter?.let { generatePropertyAccessor(it, fieldSymbol) }
-            ?.apply { parent = propertyParent }
+            ?.apply { parent = propertyParent; correspondingPropertySymbol = irProperty.symbol }
         irProperty.setter = propertyDescriptor.setter?.let { generatePropertyAccessor(it, fieldSymbol) }
-            ?.apply { parent = propertyParent }
+            ?.apply { parent = propertyParent; correspondingPropertySymbol = irProperty.symbol }
         return irProperty
     }
 
@@ -517,17 +517,15 @@ interface IrBuilderExtension {
         nullableSerializerClass: IrClassSymbol
     ): IrExpression {
         return if (type.isMarkedNullable) {
-            val classDeclaration = nullableSerializerClass.owner
+            val nullableConstructor =
-            val nullableConstructor = classDeclaration.declarations.first { it is IrConstructor } as IrConstructor
+                compilerContext.symbolTable.referenceConstructor(nullableSerializerClass.descriptor.constructors.toList().first())
             val resultType = type.makeNotNullable()
-            val typeParameters = classDeclaration.typeParameters
-            val typeArguments = listOf(resultType.toIrType())
             irInvoke(
-                null, nullableConstructor.symbol,
+                null, nullableConstructor,
-                typeArguments = typeArguments,
+                typeArguments = listOf(resultType.toIrType()),
                 valueArguments = listOf(expression),
                 // Return type should be correctly substituted
-                returnTypeHint = nullableConstructor.returnType.substitute(typeParameters, typeArguments)
+                returnTypeHint = nullableConstructor.descriptor.returnType.replace(listOf(resultType.asTypeProjection())).toIrType()
             )
         } else {
             expression

plugins/kotlin-serialization/kotlin-serialization-compiler/src/org/jetbrains/kotlinx/serialization/compiler/backend/ir/SerializerIrGenerator.kt

@@ -232,7 +232,7 @@ open class SerializerIrGenerator(val irClass: IrClass, final override val compil
         //  fun beginStructure(desc: SerialDescriptor, vararg typeParams: KSerializer<*>): StructureEncoder
         val beginFunc = encoderClass.referenceMethod(CallingConventions.begin) { it.valueParameters.size == 1 }
 
-        val call = irCall(beginFunc, type = beginFunc.owner.returnType).mapValueParametersIndexed { _, _ ->
+        val call = irCall(beginFunc, type = kOutputClass.defaultType.toIrType()).mapValueParametersIndexed { _, _ ->
             irGet(localSerialDesc)
         }
         // can it be done in more concise way? e.g. additional builder function?
@@ -365,7 +365,8 @@ open class SerializerIrGenerator(val irClass: IrClass, final override val compil
         val call = irInvoke(
             irGet(loadFunc.valueParameters[0]),
             beginFunc,
-            irGet(localSerialDesc)
+            irGet(localSerialDesc),
+            typeHint = inputClass.defaultType.toIrType()
         )
         val localInput = irTemporary(call, "input")
 

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/codegen/Basic.ir.txt

@@ -3,7 +3,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
 
     public final static kotlinx.serialization.SerialDescriptor descriptor
 
-    public final static void <clinit>() {
+    static void <clinit>() {
           NEW
           DUP
           INVOKESPECIAL (ListOfUsers$$serializer, <init>, ()V)
@@ -22,7 +22,8 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           LDC (ListOfUsers)
           ALOAD (0)
           CHECKCAST
-          INVOKESPECIAL (kotlinx/serialization/internal/SerialClassDescImpl, <init>, (Ljava/lang/String;Lkotlinx/serialization/internal/GeneratedSerializer;)V)
+          ICONST_1
+          INVOKESPECIAL (kotlinx/serialization/internal/SerialClassDescImpl, <init>, (Ljava/lang/String;Lkotlinx/serialization/internal/GeneratedSerializer;I)V)
           ASTORE (1)
           ALOAD (1)
           LDC (list)
@@ -48,6 +49,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           GETSTATIC (INSTANCE, LUser$$serializer;)
           CHECKCAST
           INVOKESPECIAL (kotlinx/serialization/internal/ArrayListSerializer, <init>, (Lkotlinx/serialization/KSerializer;)V)
+          CHECKCAST
           AASTORE
           ALOAD (1)
           ARETURN
@@ -58,7 +60,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
         LABEL (L0)
           ALOAD (1)
           LDC (decoder)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
         LABEL (L1)
         LINENUMBER (12)
           ALOAD (0)
@@ -74,10 +76,28 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           ASTORE (6)
           ALOAD (1)
           ALOAD (2)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeDecoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeDecoder;)
           ASTORE (7)
+          ALOAD (7)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSequentially, ()Z)
+          IFEQ (L2)
+          ALOAD (7)
+          ALOAD (2)
+          ICONST_0
+          NEW
+          DUP
+          GETSTATIC (INSTANCE, LUser$$serializer;)
+          CHECKCAST
+          INVOKESPECIAL (kotlinx/serialization/internal/ArrayListSerializer, <init>, (Lkotlinx/serialization/KSerializer;)V)
+          CHECKCAST
+          ALOAD (6)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
+          ASTORE (6)
+          ILOAD (5)
+          ICONST_1
+          IOR
+          ISTORE (5)
+          GOTO (L3)
         LABEL (L2)
           ILOAD (3)
           IFEQ (L3)
@@ -101,9 +121,8 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           CHECKCAST
           INVOKESPECIAL (kotlinx/serialization/internal/ArrayListSerializer, <init>, (Lkotlinx/serialization/KSerializer;)V)
           CHECKCAST
-          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;)Ljava/lang/Object;)
+          ALOAD (6)
-          CHECKCAST
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
-          CHECKCAST
           ASTORE (6)
           ILOAD (5)
           ICONST_1
@@ -137,7 +156,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
         LABEL (L9)
     }
 
-    public java.lang.Object deserialize(kotlinx.serialization.Decoder p0) {
+    public java.lang.Object deserialize(kotlinx.serialization.Decoder decoder) {
         LABEL (L0)
           ALOAD (0)
           ALOAD (1)
@@ -150,16 +169,16 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
 
     public ListOfUsers patch(kotlinx.serialization.Decoder decoder, ListOfUsers old)
 
-    public java.lang.Object patch(kotlinx.serialization.Decoder p0, java.lang.Object p1)
+    public java.lang.Object patch(kotlinx.serialization.Decoder decoder, java.lang.Object old)
 
-    public void serialize(kotlinx.serialization.Encoder encoder, ListOfUsers obj) {
+    public void serialize(kotlinx.serialization.Encoder encoder, ListOfUsers value) {
         LABEL (L0)
           ALOAD (1)
           LDC (encoder)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
-          LDC (obj)
+          LDC (value)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
         LABEL (L1)
         LINENUMBER (12)
           ALOAD (0)
@@ -167,9 +186,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           ASTORE (3)
           ALOAD (1)
           ALOAD (3)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeEncoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeEncoder;)
           ASTORE (4)
           ALOAD (4)
           ALOAD (3)
@@ -181,7 +198,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           INVOKESPECIAL (kotlinx/serialization/internal/ArrayListSerializer, <init>, (Lkotlinx/serialization/KSerializer;)V)
           CHECKCAST
           ALOAD (2)
-          INVOKESTATIC (ListOfUsers, access$prop$getList$3, (LListOfUsers;)Ljava/util/List;)
+          INVOKESTATIC (ListOfUsers, access$getList$p, (LListOfUsers;)Ljava/util/List;)
           INVOKEINTERFACE (kotlinx/serialization/CompositeEncoder, encodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/SerializationStrategy;Ljava/lang/Object;)V)
           ALOAD (4)
           ALOAD (3)
@@ -192,7 +209,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
         LABEL (L3)
     }
 
-    public void serialize(kotlinx.serialization.Encoder p0, java.lang.Object p1) {
+    public void serialize(kotlinx.serialization.Encoder encoder, java.lang.Object value) {
         LABEL (L0)
           ALOAD (0)
           ALOAD (1)
@@ -202,6 +219,8 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           RETURN
         LABEL (L1)
     }
+
+    public kotlinx.serialization.KSerializer[] typeParametersSerializers()
 }
 
 public final class ListOfUsers$Companion : java/lang/Object {
@@ -215,7 +234,7 @@ public final class ListOfUsers$Companion : java/lang/Object {
         LABEL (L2)
     }
 
-    public void <init>(kotlin.jvm.internal.DefaultConstructorMarker p0) {
+    public void <init>(kotlin.jvm.internal.DefaultConstructorMarker $constructor_marker) {
         LABEL (L0)
           ALOAD (0)
           INVOKESPECIAL (ListOfUsers$Companion, <init>, ()V)
@@ -231,7 +250,7 @@ public final class ListOfUsers : java/lang/Object {
 
     private final java.util.List list
 
-    public final static void <clinit>() {
+    static void <clinit>() {
           NEW
           DUP
           ACONST_NULL
@@ -244,7 +263,7 @@ public final class ListOfUsers : java/lang/Object {
         LABEL (L0)
           ALOAD (1)
           LDC (list)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (0)
         LABEL (L1)
         LINENUMBER (12)
@@ -284,7 +303,7 @@ public final class ListOfUsers : java/lang/Object {
         LABEL (L4)
     }
 
-    public final static java.util.List access$prop$getList$3(ListOfUsers p0)
+    public final static java.util.List access$getList$p(ListOfUsers $this)
 
     public final java.util.List getList()
 }
@@ -294,7 +313,7 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
 
     public final static kotlinx.serialization.SerialDescriptor descriptor
 
-    public final static void <clinit>() {
+    static void <clinit>() {
           NEW
           DUP
           INVOKESPECIAL (OptionalUser$$serializer, <init>, ()V)
@@ -313,7 +332,8 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           LDC (OptionalUser)
           ALOAD (0)
           CHECKCAST
-          INVOKESPECIAL (kotlinx/serialization/internal/SerialClassDescImpl, <init>, (Ljava/lang/String;Lkotlinx/serialization/internal/GeneratedSerializer;)V)
+          ICONST_1
+          INVOKESPECIAL (kotlinx/serialization/internal/SerialClassDescImpl, <init>, (Ljava/lang/String;Lkotlinx/serialization/internal/GeneratedSerializer;I)V)
           ASTORE (1)
           ALOAD (1)
           LDC (user)
@@ -346,7 +366,7 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
         LABEL (L0)
           ALOAD (1)
           LDC (decoder)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
         LABEL (L1)
         LINENUMBER (9)
           ALOAD (0)
@@ -362,10 +382,24 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           ASTORE (6)
           ALOAD (1)
           ALOAD (2)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeDecoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeDecoder;)
           ASTORE (7)
+          ALOAD (7)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSequentially, ()Z)
+          IFEQ (L2)
+          ALOAD (7)
+          ALOAD (2)
+          ICONST_0
+          GETSTATIC (INSTANCE, LUser$$serializer;)
+          CHECKCAST
+          ALOAD (6)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
+          ASTORE (6)
+          ILOAD (5)
+          ICONST_1
+          IOR
+          ISTORE (5)
+          GOTO (L3)
         LABEL (L2)
           ILOAD (3)
           IFEQ (L3)
@@ -385,9 +419,8 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           ICONST_0
           GETSTATIC (INSTANCE, LUser$$serializer;)
           CHECKCAST
-          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;)Ljava/lang/Object;)
+          ALOAD (6)
-          CHECKCAST
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
-          CHECKCAST
           ASTORE (6)
           ILOAD (5)
           ICONST_1
@@ -421,7 +454,7 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
         LABEL (L9)
     }
 
-    public java.lang.Object deserialize(kotlinx.serialization.Decoder p0) {
+    public java.lang.Object deserialize(kotlinx.serialization.Decoder decoder) {
         LABEL (L0)
           ALOAD (0)
           ALOAD (1)
@@ -434,16 +467,16 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
 
     public OptionalUser patch(kotlinx.serialization.Decoder decoder, OptionalUser old)
 
-    public java.lang.Object patch(kotlinx.serialization.Decoder p0, java.lang.Object p1)
+    public java.lang.Object patch(kotlinx.serialization.Decoder decoder, java.lang.Object old)
 
-    public void serialize(kotlinx.serialization.Encoder encoder, OptionalUser obj) {
+    public void serialize(kotlinx.serialization.Encoder encoder, OptionalUser value) {
         LABEL (L0)
           ALOAD (1)
           LDC (encoder)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
-          LDC (obj)
+          LDC (value)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
         LABEL (L1)
         LINENUMBER (9)
           ALOAD (0)
@@ -451,12 +484,10 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           ASTORE (3)
           ALOAD (1)
           ALOAD (3)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeEncoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeEncoder;)
           ASTORE (4)
           ALOAD (2)
-          INVOKESTATIC (OptionalUser, access$prop$getUser$2, (LOptionalUser;)LUser;)
+          INVOKESTATIC (OptionalUser, access$getUser$p, (LOptionalUser;)LUser;)
           NEW
           DUP
         LABEL (L2)
@@ -483,7 +514,7 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           GETSTATIC (INSTANCE, LUser$$serializer;)
           CHECKCAST
           ALOAD (2)
-          INVOKESTATIC (OptionalUser, access$prop$getUser$2, (LOptionalUser;)LUser;)
+          INVOKESTATIC (OptionalUser, access$getUser$p, (LOptionalUser;)LUser;)
           INVOKEINTERFACE (kotlinx/serialization/CompositeEncoder, encodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/SerializationStrategy;Ljava/lang/Object;)V)
         LABEL (L6)
           ALOAD (4)
@@ -495,7 +526,7 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
         LABEL (L8)
     }
 
-    public void serialize(kotlinx.serialization.Encoder p0, java.lang.Object p1) {
+    public void serialize(kotlinx.serialization.Encoder encoder, java.lang.Object value) {
         LABEL (L0)
           ALOAD (0)
           ALOAD (1)
@@ -505,6 +536,8 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           RETURN
         LABEL (L1)
     }
+
+    public kotlinx.serialization.KSerializer[] typeParametersSerializers()
 }
 
 public final class OptionalUser$Companion : java/lang/Object {
@@ -518,7 +551,7 @@ public final class OptionalUser$Companion : java/lang/Object {
         LABEL (L2)
     }
 
-    public void <init>(kotlin.jvm.internal.DefaultConstructorMarker p0) {
+    public void <init>(kotlin.jvm.internal.DefaultConstructorMarker $constructor_marker) {
         LABEL (L0)
           ALOAD (0)
           INVOKESPECIAL (OptionalUser$Companion, <init>, ()V)
@@ -534,7 +567,7 @@ public final class OptionalUser : java/lang/Object {
 
     private final User user
 
-    public final static void <clinit>() {
+    static void <clinit>() {
           NEW
           DUP
           ACONST_NULL
@@ -547,7 +580,7 @@ public final class OptionalUser : java/lang/Object {
         LABEL (L0)
           ALOAD (1)
           LDC (user)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (0)
         LABEL (L1)
         LINENUMBER (9)
@@ -561,7 +594,7 @@ public final class OptionalUser : java/lang/Object {
         LABEL (L3)
     }
 
-    public void <init>(User user, int p1, kotlin.jvm.internal.DefaultConstructorMarker p2) {
+    public void <init>(User p0, int p1, kotlin.jvm.internal.DefaultConstructorMarker p2) {
         LABEL (L0)
         LINENUMBER (10)
           ILOAD (2)
@@ -579,7 +612,6 @@ public final class OptionalUser : java/lang/Object {
           ALOAD (1)
           INVOKESPECIAL (OptionalUser, <init>, (LUser;)V)
           RETURN
-        LABEL (L2)
     }
 
     public void <init>(int seen1, User user, kotlinx.serialization.SerializationConstructorMarker serializationConstructorMarker) {
@@ -625,7 +657,7 @@ public final class OptionalUser : java/lang/Object {
         LABEL (L1)
     }
 
-    public final static User access$prop$getUser$2(OptionalUser p0)
+    public final static User access$getUser$p(OptionalUser $this)
 
     public final User getUser()
 }
@@ -635,7 +667,7 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
 
     public final static kotlinx.serialization.SerialDescriptor descriptor
 
-    public final static void <clinit>() {
+    static void <clinit>() {
           NEW
           DUP
           INVOKESPECIAL (User$$serializer, <init>, ()V)
@@ -654,7 +686,8 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           LDC (User)
           ALOAD (0)
           CHECKCAST
-          INVOKESPECIAL (kotlinx/serialization/internal/SerialClassDescImpl, <init>, (Ljava/lang/String;Lkotlinx/serialization/internal/GeneratedSerializer;)V)
+          ICONST_2
+          INVOKESPECIAL (kotlinx/serialization/internal/SerialClassDescImpl, <init>, (Ljava/lang/String;Lkotlinx/serialization/internal/GeneratedSerializer;I)V)
           ASTORE (1)
           ALOAD (1)
           LDC (firstName)
@@ -696,7 +729,7 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
         LABEL (L0)
           ALOAD (1)
           LDC (decoder)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
         LABEL (L1)
         LINENUMBER (6)
           ALOAD (0)
@@ -714,10 +747,30 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           ASTORE (7)
           ALOAD (1)
           ALOAD (2)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeDecoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeDecoder;)
           ASTORE (8)
+          ALOAD (8)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSequentially, ()Z)
+          IFEQ (L2)
+          ALOAD (8)
+          ALOAD (2)
+          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeStringElement, (Lkotlinx/serialization/SerialDescriptor;I)Ljava/lang/String;)
+          ASTORE (6)
+          ILOAD (5)
+          ICONST_1
+          IOR
+          ISTORE (5)
+          ALOAD (8)
+          ALOAD (2)
+          ICONST_1
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeStringElement, (Lkotlinx/serialization/SerialDescriptor;I)Ljava/lang/String;)
+          ASTORE (7)
+          ILOAD (5)
+          ICONST_2
+          IOR
+          ISTORE (5)
+          GOTO (L3)
         LABEL (L2)
           ILOAD (3)
           IFEQ (L3)
@@ -736,7 +789,6 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           ALOAD (2)
           ICONST_0
           INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeStringElement, (Lkotlinx/serialization/SerialDescriptor;I)Ljava/lang/String;)
-          CHECKCAST
           ASTORE (6)
           ILOAD (5)
           ICONST_1
@@ -748,7 +800,6 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           ALOAD (2)
           ICONST_1
           INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeStringElement, (Lkotlinx/serialization/SerialDescriptor;I)Ljava/lang/String;)
-          CHECKCAST
           ASTORE (7)
           ILOAD (5)
           ICONST_2
@@ -774,9 +825,7 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           DUP
           ILOAD (5)
           ALOAD (6)
-          CHECKCAST
           ALOAD (7)
-          CHECKCAST
           ACONST_NULL
           CHECKCAST
           INVOKESPECIAL (User, <init>, (ILjava/lang/String;Ljava/lang/String;Lkotlinx/serialization/SerializationConstructorMarker;)V)
@@ -784,7 +833,7 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
         LABEL (L10)
     }
 
-    public java.lang.Object deserialize(kotlinx.serialization.Decoder p0) {
+    public java.lang.Object deserialize(kotlinx.serialization.Decoder decoder) {
         LABEL (L0)
           ALOAD (0)
           ALOAD (1)
@@ -797,16 +846,16 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
 
     public User patch(kotlinx.serialization.Decoder decoder, User old)
 
-    public java.lang.Object patch(kotlinx.serialization.Decoder p0, java.lang.Object p1)
+    public java.lang.Object patch(kotlinx.serialization.Decoder decoder, java.lang.Object old)
 
-    public void serialize(kotlinx.serialization.Encoder encoder, User obj) {
+    public void serialize(kotlinx.serialization.Encoder encoder, User value) {
         LABEL (L0)
           ALOAD (1)
           LDC (encoder)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
-          LDC (obj)
+          LDC (value)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
         LABEL (L1)
         LINENUMBER (6)
           ALOAD (0)
@@ -814,21 +863,19 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           ASTORE (3)
           ALOAD (1)
           ALOAD (3)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeEncoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeEncoder;)
           ASTORE (4)
           ALOAD (4)
           ALOAD (3)
           ICONST_0
           ALOAD (2)
-          INVOKESTATIC (User, access$prop$getFirstName$0, (LUser;)Ljava/lang/String;)
+          INVOKESTATIC (User, access$getFirstName$p, (LUser;)Ljava/lang/String;)
           INVOKEINTERFACE (kotlinx/serialization/CompositeEncoder, encodeStringElement, (Lkotlinx/serialization/SerialDescriptor;ILjava/lang/String;)V)
           ALOAD (4)
           ALOAD (3)
           ICONST_1
           ALOAD (2)
-          INVOKESTATIC (User, access$prop$getLastName$1, (LUser;)Ljava/lang/String;)
+          INVOKESTATIC (User, access$getLastName$p, (LUser;)Ljava/lang/String;)
           INVOKEINTERFACE (kotlinx/serialization/CompositeEncoder, encodeStringElement, (Lkotlinx/serialization/SerialDescriptor;ILjava/lang/String;)V)
           ALOAD (4)
           ALOAD (3)
@@ -839,7 +886,7 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
         LABEL (L3)
     }
 
-    public void serialize(kotlinx.serialization.Encoder p0, java.lang.Object p1) {
+    public void serialize(kotlinx.serialization.Encoder encoder, java.lang.Object value) {
         LABEL (L0)
           ALOAD (0)
           ALOAD (1)
@@ -849,6 +896,8 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           RETURN
         LABEL (L1)
     }
+
+    public kotlinx.serialization.KSerializer[] typeParametersSerializers()
 }
 
 public final class User$Companion : java/lang/Object {
@@ -862,7 +911,7 @@ public final class User$Companion : java/lang/Object {
         LABEL (L2)
     }
 
-    public void <init>(kotlin.jvm.internal.DefaultConstructorMarker p0) {
+    public void <init>(kotlin.jvm.internal.DefaultConstructorMarker $constructor_marker) {
         LABEL (L0)
           ALOAD (0)
           INVOKESPECIAL (User$Companion, <init>, ()V)
@@ -880,7 +929,7 @@ public final class User : java/lang/Object {
 
     private final java.lang.String lastName
 
-    public final static void <clinit>() {
+    static void <clinit>() {
           NEW
           DUP
           ACONST_NULL
@@ -893,10 +942,10 @@ public final class User : java/lang/Object {
         LABEL (L0)
           ALOAD (1)
           LDC (firstName)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
           LDC (lastName)
-          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkParameterIsNotNull, (Ljava/lang/Object;Ljava/lang/String;)V)
+          INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (0)
         LABEL (L1)
         LINENUMBER (6)
@@ -956,9 +1005,9 @@ public final class User : java/lang/Object {
         LABEL (L6)
     }
 
-    public final static java.lang.String access$prop$getFirstName$0(User p0)
+    public final static java.lang.String access$getFirstName$p(User $this)
 
-    public final static java.lang.String access$prop$getLastName$1(User p0)
+    public final static java.lang.String access$getLastName$p(User $this)
 
     public final java.lang.String getFirstName()
 

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/codegen/Basic.txt

@@ -67,9 +67,7 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           ASTORE (5)
           ALOAD (1)
           ALOAD (2)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeDecoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeDecoder;)
           ASTORE (1)
           ALOAD (1)
           INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSequentially, ()Z)
@@ -104,16 +102,8 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           GETSTATIC (INSTANCE, LUser$$serializer;)
           CHECKCAST
           INVOKESPECIAL (kotlinx/serialization/internal/ArrayListSerializer, <init>, (Lkotlinx/serialization/KSerializer;)V)
-          ILOAD (4)
-          ICONST_1
-          IAND
-          IFEQ (L4)
           ALOAD (5)
-          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, updateSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
-          GOTO (L5)
-        LABEL (L4)
-          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;)Ljava/lang/Object;)
-        LABEL (L5)
           CHECKCAST
           ASTORE (5)
           ILOAD (4)
@@ -132,14 +122,14 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           ACONST_NULL
           INVOKESPECIAL (ListOfUsers, <init>, (ILjava/util/List;Lkotlinx/serialization/SerializationConstructorMarker;)V)
           ARETURN
-        LABEL (L6)
+        LABEL (L4)
           NEW
           DUP
           ILOAD (3)
           INVOKESPECIAL (kotlinx/serialization/UnknownFieldException, <init>, (I)V)
           CHECKCAST
           ATHROW
-        LABEL (L7)
+        LABEL (L5)
     }
 
     public java.lang.Object deserialize(kotlinx.serialization.Decoder p0) {
@@ -157,21 +147,19 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
 
     public java.lang.Object patch(kotlinx.serialization.Decoder p0, java.lang.Object p1)
 
-    public void serialize(kotlinx.serialization.Encoder encoder, ListOfUsers obj) {
+    public void serialize(kotlinx.serialization.Encoder encoder, ListOfUsers value) {
         LABEL (L0)
           ALOAD (1)
           LDC (encoder)
           INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
-          LDC (obj)
+          LDC (value)
           INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           GETSTATIC ($$serialDesc, Lkotlinx/serialization/SerialDescriptor;)
           ASTORE (3)
           ALOAD (1)
           ALOAD (3)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeEncoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeEncoder;)
           ASTORE (1)
           ALOAD (2)
           ALOAD (1)
@@ -194,6 +182,8 @@ public final class ListOfUsers$$serializer : java/lang/Object, kotlinx/serializa
           INVOKEVIRTUAL (ListOfUsers$$serializer, serialize, (Lkotlinx/serialization/Encoder;LListOfUsers;)V)
           RETURN
     }
+
+    public kotlinx.serialization.KSerializer[] typeParametersSerializers()
 }
 
 public final class ListOfUsers$Companion : java/lang/Object {
@@ -365,9 +355,7 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           ASTORE (5)
           ALOAD (1)
           ALOAD (2)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeDecoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeDecoder;)
           ASTORE (1)
           ALOAD (1)
           INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSequentially, ()Z)
@@ -396,16 +384,8 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           ICONST_0
           GETSTATIC (INSTANCE, LUser$$serializer;)
           CHECKCAST
-          ILOAD (4)
-          ICONST_1
-          IAND
-          IFEQ (L4)
           ALOAD (5)
-          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, updateSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
+          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;Ljava/lang/Object;)Ljava/lang/Object;)
-          GOTO (L5)
-        LABEL (L4)
-          INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSerializableElement, (Lkotlinx/serialization/SerialDescriptor;ILkotlinx/serialization/DeserializationStrategy;)Ljava/lang/Object;)
-        LABEL (L5)
           CHECKCAST
           ASTORE (5)
           ILOAD (4)
@@ -424,14 +404,14 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           ACONST_NULL
           INVOKESPECIAL (OptionalUser, <init>, (ILUser;Lkotlinx/serialization/SerializationConstructorMarker;)V)
           ARETURN
-        LABEL (L6)
+        LABEL (L4)
           NEW
           DUP
           ILOAD (3)
           INVOKESPECIAL (kotlinx/serialization/UnknownFieldException, <init>, (I)V)
           CHECKCAST
           ATHROW
-        LABEL (L7)
+        LABEL (L5)
     }
 
     public java.lang.Object deserialize(kotlinx.serialization.Decoder p0) {
@@ -449,21 +429,19 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
 
     public java.lang.Object patch(kotlinx.serialization.Decoder p0, java.lang.Object p1)
 
-    public void serialize(kotlinx.serialization.Encoder encoder, OptionalUser obj) {
+    public void serialize(kotlinx.serialization.Encoder encoder, OptionalUser value) {
         LABEL (L0)
           ALOAD (1)
           LDC (encoder)
           INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
-          LDC (obj)
+          LDC (value)
           INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           GETSTATIC ($$serialDesc, Lkotlinx/serialization/SerialDescriptor;)
           ASTORE (3)
           ALOAD (1)
           ALOAD (3)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeEncoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeEncoder;)
           ASTORE (1)
           ALOAD (2)
           ALOAD (1)
@@ -486,6 +464,8 @@ public final class OptionalUser$$serializer : java/lang/Object, kotlinx/serializ
           INVOKEVIRTUAL (OptionalUser$$serializer, serialize, (Lkotlinx/serialization/Encoder;LOptionalUser;)V)
           RETURN
     }
+
+    public kotlinx.serialization.KSerializer[] typeParametersSerializers()
 }
 
 public final class OptionalUser$Companion : java/lang/Object {
@@ -719,9 +699,7 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           ASTORE (6)
           ALOAD (1)
           ALOAD (2)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeDecoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Decoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeDecoder;)
           ASTORE (1)
           ALOAD (1)
           INVOKEINTERFACE (kotlinx/serialization/CompositeDecoder, decodeSequentially, ()Z)
@@ -805,21 +783,19 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
 
     public java.lang.Object patch(kotlinx.serialization.Decoder p0, java.lang.Object p1)
 
-    public void serialize(kotlinx.serialization.Encoder encoder, User obj) {
+    public void serialize(kotlinx.serialization.Encoder encoder, User value) {
         LABEL (L0)
           ALOAD (1)
           LDC (encoder)
           INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           ALOAD (2)
-          LDC (obj)
+          LDC (value)
           INVOKESTATIC (kotlin/jvm/internal/Intrinsics, checkNotNullParameter, (Ljava/lang/Object;Ljava/lang/String;)V)
           GETSTATIC ($$serialDesc, Lkotlinx/serialization/SerialDescriptor;)
           ASTORE (3)
           ALOAD (1)
           ALOAD (3)
-          ICONST_0
+          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;)Lkotlinx/serialization/CompositeEncoder;)
-          ANEWARRAY
-          INVOKEINTERFACE (kotlinx/serialization/Encoder, beginStructure, (Lkotlinx/serialization/SerialDescriptor;[Lkotlinx/serialization/KSerializer;)Lkotlinx/serialization/CompositeEncoder;)
           ASTORE (1)
           ALOAD (2)
           ALOAD (1)
@@ -842,6 +818,8 @@ public final class User$$serializer : java/lang/Object, kotlinx/serialization/in
           INVOKEVIRTUAL (User$$serializer, serialize, (Lkotlinx/serialization/Encoder;LUser;)V)
           RETURN
     }
+
+    public kotlinx.serialization.KSerializer[] typeParametersSerializers()
 }
 
 public final class User$Companion : java/lang/Object {

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/DuplicateSerialName.txt

@@ -15,9 +15,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Derived
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Derived): Derived
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Derived): Derived
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Derived): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Derived): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {
@@ -44,9 +45,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Parent
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Parent): Parent
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Parent): Parent
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Parent): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Parent): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/NoSuitableCtorInParent.txt

@@ -16,9 +16,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Derived
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Derived): Derived
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Derived): Derived
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Derived): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Derived): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/NonSerializable.txt

@@ -15,9 +15,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Basic
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Basic): Basic
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Basic): Basic
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Basic): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Basic): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {
@@ -44,9 +45,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Inside
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Inside): Inside
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Inside): Inside
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Inside): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Inside): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {
@@ -80,9 +82,10 @@ public final class NonSerializable {
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): WithImplicitType
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: WithImplicitType): WithImplicitType
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: WithImplicitType): WithImplicitType
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: WithImplicitType): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: WithImplicitType): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/NullabilityIncompatible.kt

@@ -9,7 +9,7 @@ class Nope {}
 class NopeNullableSerializer: KSerializer<Nope?> {
     override val descriptor: SerialDescriptor get() = TODO()
     override fun deserialize(decoder: Decoder): Nope? = TODO()
-    override fun serialize(encoder: Encoder, obj: Nope?) = TODO()
+    override fun serialize(encoder: Encoder, value: Nope?) = TODO()
 }
 
 @Serializable

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/NullabilityIncompatible.txt

@@ -15,9 +15,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Foo
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Foo): Foo
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Foo): Foo
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Foo): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Foo): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {
@@ -50,7 +51,7 @@ public final class NopeNullableSerializer : kotlinx.serialization.KSerializer<No
     public open override /*1*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Nope?
     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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Nope?): Nope?
+    @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Nope?): Nope?
-    public open override /*1*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Nope?): kotlin.Nothing
+    public open override /*1*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Nope?): kotlin.Nothing
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/ParamIsNotProperty.txt

@@ -15,9 +15,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): Test
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Test): Test
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: Test): Test
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: Test): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: Test): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/SerializableEnums.kt

@@ -7,16 +7,14 @@ enum class SimpleEnum { A, B }
 
 <!EXPLICIT_SERIALIZABLE_IS_REQUIRED!>enum<!> class MarkedNameEnum { @SerialName("a") A, B}
 
-<!EXPLICIT_SERIALIZABLE_IS_REQUIRED!>enum<!> class MarkedInfoEnum { @SerialId(10) A, B}
-
 @Serializable
-enum class ExplicitlyMarkedEnum { @SerialId(10) A, B}
+enum class ExplicitlyMarkedEnum { @SerialName("a") A, B}
 
 @Serializable(EnumSerializer::class)
-enum class ExplicitlyMarkedEnumCustom { @SerialId(10) A, B}
+enum class ExplicitlyMarkedEnumCustom { @SerialName("a") A, B}
 
 object EnumSerializer: KSerializer<ExplicitlyMarkedEnumCustom> {
     override val descriptor = TODO()
-    override fun serialize(encoder: Encoder, obj: ExplicitlyMarkedEnumCustom) = TODO()
+    override fun serialize(encoder: Encoder, value: ExplicitlyMarkedEnumCustom) = TODO()
     override fun deserialize(decoder: Decoder): ExplicitlyMarkedEnumCustom = TODO()
 }

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/SerializableEnums.txt

@@ -6,13 +6,13 @@ public object EnumSerializer : kotlinx.serialization.KSerializer<ExplicitlyMarke
     public open override /*1*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): ExplicitlyMarkedEnumCustom
     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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: ExplicitlyMarkedEnumCustom): ExplicitlyMarkedEnumCustom
+    @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: ExplicitlyMarkedEnumCustom): ExplicitlyMarkedEnumCustom
-    public open override /*1*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: ExplicitlyMarkedEnumCustom): kotlin.Nothing
+    public open override /*1*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: ExplicitlyMarkedEnumCustom): kotlin.Nothing
     public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
 }
 
 @kotlinx.serialization.Serializable public final enum class ExplicitlyMarkedEnum : kotlin.Enum<ExplicitlyMarkedEnum> {
-    @kotlinx.serialization.SerialId(id = 10) enum entry A
+    @kotlinx.serialization.SerialName(value = "a") enum entry A
 
     enum entry B
 
@@ -34,9 +34,10 @@ public object EnumSerializer : kotlinx.serialization.KSerializer<ExplicitlyMarke
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): ExplicitlyMarkedEnum
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: ExplicitlyMarkedEnum): ExplicitlyMarkedEnum
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: ExplicitlyMarkedEnum): ExplicitlyMarkedEnum
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: ExplicitlyMarkedEnum): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: ExplicitlyMarkedEnum): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {
@@ -53,7 +54,7 @@ public object EnumSerializer : kotlinx.serialization.KSerializer<ExplicitlyMarke
 }
 
 @kotlinx.serialization.Serializable(with = EnumSerializer::class) public final enum class ExplicitlyMarkedEnumCustom : kotlin.Enum<ExplicitlyMarkedEnumCustom> {
-    @kotlinx.serialization.SerialId(id = 10) enum entry A
+    @kotlinx.serialization.SerialName(value = "a") enum entry A
 
     enum entry B
 
@@ -73,27 +74,6 @@ public object EnumSerializer : kotlinx.serialization.KSerializer<ExplicitlyMarke
     public final /*synthesized*/ fun values(): kotlin.Array<ExplicitlyMarkedEnumCustom>
 }
 
-public final enum class MarkedInfoEnum : kotlin.Enum<MarkedInfoEnum> {
-    @kotlinx.serialization.SerialId(id = 10) enum entry A
-
-    enum entry B
-
-    private constructor MarkedInfoEnum()
-    public final override /*1*/ /*fake_override*/ val name: kotlin.String
-    public final override /*1*/ /*fake_override*/ val ordinal: kotlin.Int
-    protected final override /*1*/ /*fake_override*/ fun clone(): kotlin.Any
-    public final override /*1*/ /*fake_override*/ fun compareTo(/*0*/ other: MarkedInfoEnum): kotlin.Int
-    public final override /*1*/ /*fake_override*/ fun equals(/*0*/ other: kotlin.Any?): kotlin.Boolean
-    protected/*protected and package*/ final override /*1*/ /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun finalize(): kotlin.Unit
-    public final override /*1*/ /*fake_override*/ /*isHiddenForResolutionEverywhereBesideSupercalls*/ fun getDeclaringClass(): java.lang.Class<MarkedInfoEnum!>!
-    public final override /*1*/ /*fake_override*/ fun hashCode(): kotlin.Int
-    public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
-
-    // Static members
-    public final /*synthesized*/ fun valueOf(/*0*/ value: kotlin.String): MarkedInfoEnum
-    public final /*synthesized*/ fun values(): kotlin.Array<MarkedInfoEnum>
-}
-
 public final enum class MarkedNameEnum : kotlin.Enum<MarkedNameEnum> {
     @kotlinx.serialization.SerialName(value = "a") enum entry A
 

plugins/kotlin-serialization/kotlin-serialization-compiler/testData/diagnostics/Transients.txt

@@ -19,9 +19,10 @@ package
         public open override /*1*/ /*synthesized*/ fun deserialize(/*0*/ decoder: kotlinx.serialization.Decoder): WithTransients
         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 patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: WithTransients): WithTransients
+        @kotlin.Deprecated(level = DeprecationLevel.ERROR, message = "Patch function is deprecated for removal since this functionality is no longer supported by serializer.Some formats may provide implementation-specific patching in their Decoders.") public open override /*1*/ /*fake_override*/ fun patch(/*0*/ decoder: kotlinx.serialization.Decoder, /*1*/ old: WithTransients): WithTransients
-        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ obj: WithTransients): kotlin.Unit
+        public open override /*1*/ /*synthesized*/ fun serialize(/*0*/ encoder: kotlinx.serialization.Encoder, /*1*/ value: WithTransients): kotlin.Unit
         public open override /*1*/ /*fake_override*/ fun toString(): kotlin.String
+        public open override /*1*/ /*fake_override*/ fun typeParametersSerializers(): kotlin.Array<kotlinx.serialization.KSerializer<*>>
     }
 
     public companion object Companion {

tests/mute-common.csv

@@ -52,7 +52,6 @@ org.jetbrains.kotlin.psi.injection.StringInterpolationInjectionTest.testInterpol
 org.jetbrains.kotlin.nj2k.NewJavaToKotlinConverterSingleFileTestGenerated.Issues.testKt_8170, KT-36459
 org.jetbrains.kotlin.shortenRefs.ShortenRefsTestGenerated.testExtensionForObject2, Always red
 org.jetbrains.kotlin.util.KotlinVersionsTest.testVersionsAreConsistent, KT-35567
-org.jetbrains.kotlinx.serialization.SerializationIrBytecodeListingTestGenerated.testBasic, wait until new serialziation runtime version will be publicly available
 org.jetbrains.kotlin.jvm.compiler.CompileKotlinAgainstJavaTestGenerated.WithAPT.testClassWithTypeParameter, KT-36448
 org.jetbrains.kotlin.jvm.compiler.CompileKotlinAgainstJavaTestGenerated.WithoutAPT.testClassWithTypeParameter, KT-36448
 org.jetbrains.kotlin.idea.debugger.test.AsyncStackTraceTestGenerated.testAllFilesPresentInAsyncStackTrace, redesign test AsyncStackTraces