kotlin.ClassCastException: class kotlin.native.internal.NSDictionaryAsKMap cannot be cast to class kotlin.String

[mrgdev]

I use mokoSocketIo in Kotlin multiplatform project for both platform, ios and Android. In Android all works as expected. In iOS
I receive the following error when I try to emit text message to the server:
Uncaught Kotlin exception: kotlin.ClassCastException: class kotlin.native.internal.NSDictionaryAsKMap cannot be cast to class kotlin.String
at 0 shared 0x10701027b kfun:kotlin.Throwable#(kotlin.String?){} + 107 (/opt/buildAgent/work/acafc8c59a79cc1/kotlin/kotlin-native/runtime/src/main/kotlin/kotlin/Throwable.kt:25:37)
at 1 shared 0x107009df7 kfun:kotlin.Exception#(kotlin.String?){} + 103 (/opt/buildAgent/work/acafc8c59a79cc1/kotlin/kotlin-native/runtime/src/main/kotlin/kotlin/Exceptions.kt:23:44)
at 2 shared 0x10700a037 kfun:kotlin.RuntimeException#(kotlin.String?){} + 103 (/opt/buildAgent/work/acafc8c59a79cc1/kotlin/kotlin-native/runtime/src/main/kotlin/kotlin/Exceptions.kt:34:44)
at 3 shared 0x10700aab7 kfun:kotlin.ClassCastException#(kotlin.String?){} + 103 (/opt/buildAgent/work/acafc8c59a79cc1/kotlin/kotlin-native/runtime/src/main/kotlin/kotlin/Exceptions.kt:106:44)
at 4 shared 0x10704348e ThrowClassCastException + 782 (/opt/buildAgent/work/acafc8c59a79cc1/kotlin/kotlin-native/runtime/src/main/kotlin/kotlin/native/internal/RuntimeUtils.kt:31:11)
at 5 shared 0x107484879 kfun:dev.icerock.moko.socket.SocketEvent.Error#mapper(kotlin.collections.List<>){}kotlin.Throwable + 425 (/Users/runner/work/moko-socket-io/moko-socket-io/socket-io/src/iosMain/kotlin/dev/icerock/moko/socket/SocketEvent.kt:37:49)
at 6 shared 0x1074831fc kfun:dev.icerock.moko.socket.Socket.object-1.on$lambda$1#internal + 604 (/Users/runner/work/moko-socket-io/moko-socket-io/socket-io/src/iosMain/kotlin/dev/icerock/moko/socket/Socket.kt:39:44)
at 7 shared 0x10748354b kfun:dev.icerock.moko.socket.Socket.object-1.$on$lambda$1$FUNCTION_REFERENCE$1.invoke#internal + 107 (/Users/runner/work/moko-socket-io/moko-socket-io/socket-io/src/iosMain/kotlin/dev/icerock/moko/socket/Socket.kt:38:25)
at 8 shared 0x1074836ed kfun:dev.icerock.moko.socket.Socket.object-1.$on$lambda$1$FUNCTION_REFERENCE$1.$invoke(kotlin.collections.List<>?){}#internal + 93 (/Users/runner/work/moko-socket-io/moko-socket-io/socket-io/src/iosMain/kotlin/dev/icerock/moko/socket/Socket.kt:38:25)
at 9 shared 0x1074839f3 6465762e696365726f636b2e6d6f6b6f3a736f636b65742d696f2f55736572732f72756e6e65722f776f726b2f6d6f6b6f2d736f636b65742d696f2f6d6f6b6f2d736f636b65742d696f2f736f636b65742d696f2f7372632f696f734d61696e2f6b6f746c696e2f6465762f696365726f636b2f6d6f6b6f2f736f636b65742f536f636b65742e6b74_knbridge10 + 275 (/Users/runner/work/moko-socket-io/moko-socket-io/socket-io/src/iosMain/kotlin/dev/icerock/moko/socket/Socket.kt:38:25)
at 10 mokoSocketIo 0x104ba355c $sSo7NSArrayCIeyBy_SayypGIegg_TR + 44
at 11 mokoSocketIo 0x104ba33e1 $s12mokoSocketIo0bC0C2on11socketEvent6actionyAA0bF0O_ySayypGctFyAI_0B2IO0B10AckEmitterCtcfU1 + 81 (/Users/hadzinets/Workspace/AIDA/flutter_new/mobile/ios/Pods/mokoSocketIo/socket-io/src/iosMain/swift/SocketIo.swift:122:7)
at 12 SocketIO 0x104eb4b08 $s8SocketIO0A12EventHandlerV15executeCallback4with0G3Ack0gA0ySayypG_SiAA0A8IOClientCtF + 168 (/Users/hadzinets/Workspace/AIDA/flutter_new/mobile/ios/Pods/Socket.IO-Client-Swift/Source/SocketIO/Client/SocketEventHandler.swift:48:9)
at 13 SocketIO 0x104ebf1c2 $s8SocketIO0A8IOClientC11handleEvent_4data17isInternalMessage7withAckySS_SayypGSbSitF + 1314 (/Users/hadzinets/Workspace/AIDA/flutter_new/mobile/ios/Pods/Socket.IO-Client-Swift/Source/SocketIO/Client/SocketIOClient.swift:373:21)
at 14 SocketIO 0x104ebf7b5 $s8SocketIO0A8IOClientC12handlePacketyyAA0aE0VF + 293 (/Users/hadzinets/Workspace/AIDA/flutter_new/mobile/ios/Pods/Socket.IO-Client-Swift/Source/SocketIO/Client/SocketIOClient.swift:386:13)
at 15 SocketIO 0x104ece8db $s8SocketIO0A7ManagerC19_parseEngineMessage33_FEE990CFC310EDF111B3A4D77C509822LLyySSF + 491 (/Users/hadzinets/Workspace/AIDA/flutter_new/mobile/ios/Pods/Socket.IO-Client-Swift/Source/SocketIO/Manager/SocketManager.swift:416:27)
at 16 SocketIO 0x104ece5bf $s8SocketIO0A7ManagerC18parseEngineMessageyySSFyycfU_ + 63 (/Users/hadzinets/Workspace/AIDA/flutter_new/mobile/ios/Pods/Socket.IO-Client-Swift/Source/SocketIO/Manager/SocketManager.swift:404:18)

[Alex009]

hi. can you show your Podfile.lock content?
i see that error here:

moko-socket-io/socket-io/src/iosMain/kotlin/dev/icerock/moko/socket/SocketEvent.kt

Line 37 in 32ed1bc

val message = data.first() as String

but why socket error event have Dictionary instead of String (that works in past) need to research.

[mrgdev]

Hi, here is Podfile.lock

PODS:

• mokoSocketIo (0.4.0):
  • Socket.IO-Client-Swift (~> 15.2.0)
• Socket.IO-Client-Swift (15.2.0):
  • Starscream (~> 3.1)
• Starscream (3.1.1)

DEPENDENCIES:

• mokoSocketIo (from /~https://github.com/icerockdev/moko-socket-io.git, tag release/0.4.0)

SPEC REPOS:
trunk:
- Socket.IO-Client-Swift
- Starscream

EXTERNAL SOURCES:
mokoSocketIo:
:git: /~https://github.com/icerockdev/moko-socket-io.git
:tag: release/0.4.0

CHECKOUT OPTIONS:
mokoSocketIo:
:git: /~https://github.com/icerockdev/moko-socket-io.git
:tag: release/0.4.0

SPEC CHECKSUMS:
mokoSocketIo: 072c66dcab984f441fefe68db0b50f7a5215f15e
Socket.IO-Client-Swift: 1e3e3a1f09f3312a167f0d781eb2f383d477357c
Starscream: 4bb2f9942274833f7b4d296a55504dcfc7edb7b0

PODFILE CHECKSUM: 2b253774b0967eda50a0f1de249358e77b3f7d0a

COCOAPODS: 1.12.1

[mrgdev]

Hi @Alex009 , I need to understand if I should search for a new solution or wait until this issue would be fixed. Do you have any updates here?

[Alex009]

@mrgdev you can send PR with fixes and i publish update in few days.

[mrgdev]

@Alex009 , thank you for the answer. I will try to find another solution.