kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlin.collections.HashMap

Describe the bug

• kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlin.collections.HashMap

To Reproduce If I execute the same Request from the same HTTP Client, the Request executes Successfully with the following config:

HttpClient {
                defaultRequest {
                    header("Authorization", "Bearer ${token.access_token}")
                }
            }

but when I add

install(JsonFeature)  {
                    serializer =  KotlinxSerializer(
            Json {
                isLenient = true
                ignoreUnknownKeys = true
            }
        )
}

and use like following, then following StackTrace is printed with said Exception.

HttpClient {
                defaultRequest {
                    header("Authorization", "Bearer ${token.access_token}")
                }
               install(JsonFeature)  {
                    serializer = kotlinxSerializer
                }
            }

Expected behavior Response Should be parsed properly without any hashmap freeze.

StackTrace:

kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen kotlin.collections.HashMap@2be0d88
    at 0   SpotiFlyer                          0x00000001080fb4bf kfun:kotlin.Throwable#<init>(kotlin.String?){} + 95 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/Throwable.kt:23:37)
    at 1   SpotiFlyer                          0x00000001080f37cd kfun:kotlin.Exception#<init>(kotlin.String?){} + 93 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/Exceptions.kt:23:44)
    at 2   SpotiFlyer                          0x00000001080f3a3d kfun:kotlin.RuntimeException#<init>(kotlin.String?){} + 93 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/Exceptions.kt:34:44)
    at 3   SpotiFlyer                          0x000000010812afcd kfun:kotlin.native.concurrent.InvalidMutabilityException#<init>(kotlin.String){} + 93 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/native/concurrent/Freezing.kt:22:60)
    at 4   SpotiFlyer                          0x000000010812c7cf ThrowInvalidMutabilityException + 431 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/native/concurrent/Internal.kt:93:11)
    at 5   SpotiFlyer                          0x0000000108223770 MutationCheck + 128
    at 6   SpotiFlyer                          0x000000010810d8b2 kfun:kotlin.collections.HashMap.<set-length>#internal + 82 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/collections/HashMap.kt:16:17)
    at 7   SpotiFlyer                          0x00000001081126b1 kfun:kotlin.collections.HashMap#addKey(1:0){}kotlin.Int + 1233 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/collections/HashMap.kt:292:36)
    at 8   SpotiFlyer                          0x000000010810eaa5 kfun:kotlin.collections.HashMap#put(1:0;1:1){}1:1? + 357 (/Users/teamcity2/buildAgent/work/11ac87a349af04d5/runtime/src/main/kotlin/kotlin/collections/HashMap.kt:68:21)
    at 9   SpotiFlyer                          0x0000000108684f43 kfun:kotlinx.serialization.json.internal.DescriptorSchemaCache#set(kotlinx.serialization.descriptors.SerialDescriptor;kotlinx.serialization.json.internal.DescriptorSchemaCache.Key<0:0>;0:0){0§<kotlin.Any>} + 771 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/SchemaCache.kt:23:58)
    at 10  SpotiFlyer                          0x00000001086852f0 kfun:kotlinx.serialization.json.internal.DescriptorSchemaCache#getOrPut(kotlinx.serialization.descriptors.SerialDescriptor;kotlinx.serialization.json.internal.DescriptorSchemaCache.Key<0:0>;kotlin.Function0<0:0>){0§<kotlin.Any>}0:0 + 576 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/SchemaCache.kt:29:9)
    at 11  SpotiFlyer                          0x00000001086878c3 kfun:kotlinx.serialization.json.internal.StreamingJsonDecoder.getJsonElementIndex#internal + 899 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/StreamingJsonDecoder.kt:113:30)
    at 12  SpotiFlyer                          0x0000000108688288 kfun:kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeObjectIndex#internal + 664 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/StreamingJsonDecoder.kt:143:36)
    at 13  SpotiFlyer                          0x0000000108686e16 kfun:kotlinx.serialization.json.internal.StreamingJsonDecoder#decodeElementIndex(kotlinx.serialization.descriptors.SerialDescriptor){}kotlin.Int + 502 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/StreamingJsonDecoder.kt:75:30)
    at 14  SpotiFlyer                          0x0000000107e42de9 kfun:com.shabinder.common.models.spotify.Playlist.$serializer#deserialize(kotlinx.serialization.encoding.Decoder){}com.shabinder.common.models.spotify.Playlist + 8137
    at 15  SpotiFlyer                          0x000000010868304e kfun:kotlinx.serialization.json.internal#[e-mail](kotlinx.serialization.DeserializationStrategy<0:0>){0§<kotlin.Any?>}0:0 + 2798 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/Polymorphic.kt:63:29)
    at 16  SpotiFlyer                          0x00000001086860ca kfun:kotlinx.serialization.json.internal.StreamingJsonDecoder#decodeSerializableValue(kotlinx.serialization.DeserializationStrategy<0:0>){0§<kotlin.Any?>}0:0 + 202 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/internal/StreamingJsonDecoder.kt:32:16)
    at 17  SpotiFlyer                          0x0000000108662261 kfun:kotlinx.serialization.json.Json#decodeFromString(kotlinx.serialization.DeserializationStrategy<0:0>;kotlin.String){0§<kotlin.Any?>}0:0 + 753 (/opt/buildAgent/work/b2fef8360e1bcf3d/formats/json/commonMain/src/kotlinx/serialization/json/Json.kt:95:28)
    at 18  SpotiFlyer                          0x00000001086a87e9 kfun:io.ktor.client.features.json.serializer.KotlinxSerializer#read(io.ktor.client.call.TypeInfo;io.ktor.utils.io.core.Input){}kotlin.Any + 1081 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-features/ktor-client-json/ktor-client-serialization/common/src/io/ktor/client/features/json/serializer/**KotlinxSerializer.kt:**37:21)
    at 19  SpotiFlyer                          0x000000010860c0d5 kfun:io.ktor.client.features.json.JsonFeature.Feature.$install$lambda-1COROUTINE$1.invokeSuspend#internal + 2805 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-features/ktor-client-json/common/src/io/ktor/client/features/json/**JsonFeature.kt**:161:53)
    at 20  SpotiFlyer                          0x000000010860cb7a kfun:io.ktor.client.features.json.JsonFeature.Feature.$install$lambda-1COROUTINE$1.invoke#internal + 394 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-features/ktor-client-json/common/src/io/ktor/client/features/json/**JsonFeature.kt**:155:78)
    at 21  SpotiFlyer                          0x00000001085361e9 kfun:io.ktor.util.pipeline.SuspendFunctionGun.$loop$<anonymous>_2COROUTINE$8.invokeSuspend#internal + 697 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:17:2)
    at 22  SpotiFlyer                          0x000000010853678d kfun:io.ktor.util.pipeline.SuspendFunctionGun.$loop$<anonymous>_2COROUTINE$8.invoke#internal + 269 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:16:23)
    at 23  SpotiFlyer                          0x0000000108534a9f kfun:io.ktor.util.pipeline.SuspendFunctionGun.loop#internal + 1295 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:160:99)
    at 24  SpotiFlyer                          0x000000010853404f kfun:io.ktor.util.pipeline.SuspendFunctionGun#proceed(){}1:0 + 415 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:116:13)
    at 25  SpotiFlyer                          0x0000000108534250 kfun:io.ktor.util.pipeline.SuspendFunctionGun#proceedWith(1:0){}1:0 + 224 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:126:16)
    at 26  SpotiFlyer                          0x00000001085c8904 kfun:io.ktor.client.features.HttpCallValidator.Companion.$install$lambda-2COROUTINE$19.invokeSuspend#internal + 948 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/features/HttpCallValidator.kt:125:21)
    at 27  SpotiFlyer                          0x00000001085c91fa kfun:io.ktor.client.features.HttpCallValidator.Companion.$install$lambda-2COROUTINE$19.invoke#internal + 394 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-client/ktor-client-core/common/src/io/ktor/client/features/HttpCallValidator.kt:123:61)
    at 28  SpotiFlyer                          0x00000001085361e9 kfun:io.ktor.util.pipeline.SuspendFunctionGun.$loop$<anonymous>_2COROUTINE$8.invokeSuspend#internal + 697 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:17:2)
    at 29  SpotiFlyer                          0x000000010853678d kfun:io.ktor.util.pipeline.SuspendFunctionGun.$loop$<anonymous>_2COROUTINE$8.invoke#internal + 269 (/Users/administrator/Documents/agent/work/8d547b974a7be21f/ktor-utils/common/src/io/ktor/util/pipeline/SuspendFunctionGun.kt:16:23)

Environment

• Kotlin version: 1.4.32
• Library version: 1.2.0
• Kotlin platforms: Native(IOS)
• Gradle version: 6.8

[sandwwraith]

Another workaround is to disable useAlternativeNames in Json configuration

[sven4all]

When can we expect the 1.2.2 update with this fix included? This issue is blocking some other library upgrades we should do in our project, so would be really nice if an release can be made in the near future.