kotlinx.serialization.json deserialize error

[shuizhizhiyin]

error occur at release version, no error with debug.
I have tried to add keep rules in proguard file, but take no effect!

【keep rules】
-keep class kotlinx.serialization.json.{*;}
-keep class kotlin. {*;}

E AndroidRuntime: FATAL EXCEPTION: OkHttp Dispatcher
E AndroidRuntime: Process: com.abs.aiunit, PID: 26405
E AndroidRuntime: java.lang.NoSuchMethodError: No static method h(Ljava/lang/CharSequence;CII)I in class Lkotlin/text/StringsKt; or its super classes (declar
E AndroidRuntime: at kotlinx.serialization.json.internal.StringJsonLexer.consumeKeyString(Unknown Source:12)
E AndroidRuntime: at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeStringKey(Unknown Source:17)
E AndroidRuntime: at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeObjectIndex(Unknown Source:14)
E AndroidRuntime: at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeElementIndex(Unknown Source:26)
E AndroidRuntime: at com.abs.aiunit.plugin.realtimeasr.AsrAckMessage$$serializer.deserialize(Unknown Source:68)
E AndroidRuntime: at com.abs.aiunit.plugin.realtimeasr.AsrAckMessage$$serializer.deserialize(Unknown Source:0)
E AndroidRuntime: at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(Unknown Source:74)
E AndroidRuntime: at kotlinx.serialization.internal.m1.deserialize(Unknown Source:13)
E AndroidRuntime: at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(Unknown Source:74)
E AndroidRuntime: at kotlinx.serialization.json.Json.decodeFromString(Unknown Source:30)
E AndroidRuntime: at com.abs.aiunit.plugin.realtimeasr.OdinRealtimeAsrClient.parseMessage(Unknown Source:21)
E AndroidRuntime: at com.abs.aiunit.plugin.realtimeasr.OdinRealtimeAsrClient.access$parseMessage(Unknown Source:0)
E AndroidRuntime: at com.abs.aiunit.plugin.realtimeasr.OdinRealtimeAsrClient$odinAscListener$1.onMessage(Unknown Source:40)
E AndroidRuntime: at com.abs.aiunit.plugin.realtimeasr.connect.WebSocketClient$connectAsync$1$innerWebSocket$1.onMessage(Unknown Source:62)
E AndroidRuntime: at okhttp3.internal.ws.RealWebSocket.onReadMessage(RealWebSocket.kt:1)
E AndroidRuntime: at okhttp3.internal.ws.WebSocketReader.readMessageFrame(WebSocketReader.kt:69)
E AndroidRuntime: at okhttp3.internal.ws.WebSocketReader.processNextFrame(WebSocketReader.kt:12)
E AndroidRuntime: at okhttp3.internal.ws.RealWebSocket.loopReader(RealWebSocket.kt:11)
E AndroidRuntime: at okhttp3.internal.ws.RealWebSocket$connect$1.onResponse(RealWebSocket.kt:122)
E AndroidRuntime: at okhttp3.internal.connection.RealCall$AsyncCall.run(RealCall.kt:53)
E AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
E AndroidRuntime: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:644)
E AndroidRuntime: at java.lang.Thread.run(Thread.java:1012)

【code 】
private fun parseMessage(jsonMsg: String): AsrAckMessage? {
try {
jsonMsg.also {
val json = Json { ignoreUnknownKeys = true }
return json.decodeFromString(it)
}
} catch (e: Exception) {
PluginLog.e(tag, "parseMessage error:$jsonMsg", e)
return null
}
}

are there any ways to help, thanks!

[sandwwraith]

It looks like a misconfiguration of ProGuard. consumeKeyString uses CharSequence.indexOf from standard library's kotlin.text.StringsKt. Check that you didn't optimize it accidentally. Perhaps rule like this would help:

-keepclassmembers class kotlin.text.StringsKt {
   public static *** indexOf(...);
}

(see explanation of rule here: https://stackoverflow.com/a/38576081/5438558)