java.lang.ArrayIndexOutOfBoundsException in JsonStringBuilder 1.2.0

Describe the bug java.lang.ArrayIndexOutOfBoundsException when using Json.encodeToString() with some input, idk what exactly is causing it Stacktrace:

java.lang.ArrayIndexOutOfBoundsException: Index 473 out of bounds for length 473
	at kotlinx.serialization.json.internal.JsonStringBuilder.appendStringSlowPath(JsonStringBuilder.kt:84)
	at kotlinx.serialization.json.internal.JsonStringBuilder.appendQuoted(JsonStringBuilder.kt:61)
	at kotlinx.serialization.json.internal.Composer.printQuoted(Composers.kt:42)
	at kotlinx.serialization.json.internal.StreamingJsonEncoder.encodeString(StreamingJsonEncoder.kt:203)
	at kotlinx.serialization.internal.StringSerializer.serialize(Primitives.kt:139)
	at kotlinx.serialization.internal.StringSerializer.serialize(Primitives.kt:136)
	at kotlinx.serialization.json.internal.StreamingJsonEncoder.encodeSerializableValue(StreamingJsonEncoder.kt:211)
	at kotlinx.serialization.json.Json.encodeToString(Json.kt:80)
	at io.ktor.client.features.json.serializer.KotlinxSerializer.writeContent$ktor_client_serialization(KotlinxSerializer.kt:30)
	at io.ktor.client.features.json.serializer.KotlinxSerializer.write(KotlinxSerializer.kt:26)
	at io.ktor.client.features.json.JsonFeature$Feature$install$1.invokeSuspend(JsonFeature.kt:149)
	at io.ktor.client.features.json.JsonFeature$Feature$install$1.invoke(JsonFeature.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:246)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:116)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceedWith(SuspendFunctionGun.kt:126)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:113)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invoke(HttpCallValidator.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:246)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:116)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invoke(HttpRequestLifecycle.kt)
	at io.ktor.util.pipeline.SuspendFunctionGun.loop(SuspendFunctionGun.kt:246)
	at io.ktor.util.pipeline.SuspendFunctionGun.proceed(SuspendFunctionGun.kt:116)
	at io.ktor.util.pipeline.SuspendFunctionGun.execute(SuspendFunctionGun.kt:136)
	at io.ktor.util.pipeline.Pipeline.execute(Pipeline.kt:79)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:191)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.statement.HttpStatement.execute(HttpStatement.kt:43)
	at io.ktor.client.statement.HttpStatement.execute(HttpStatement.kt:58)
	at me.melijn.melijnbot.internals.services.twitter.TwitterService.postNewTweets(TwitterService.kt:396)
	at me.melijn.melijnbot.internals.services.twitter.TwitterService.access$postNewTweets(TwitterService.kt:26)
	at me.melijn.melijnbot.internals.services.twitter.TwitterService$service$1.invokeSuspend(TwitterService.kt:45)
	at _COROUTINE._BOUNDARY._(CoroutineDebugging.kt:46)
	at io.ktor.client.features.HttpCallValidator$Companion$install$1.invokeSuspend(HttpCallValidator.kt:113)
	at io.ktor.client.features.HttpRequestLifecycle$Feature$install$1.invokeSuspend(HttpRequestLifecycle.kt:37)
	at io.ktor.client.HttpClient.execute(HttpClient.kt:191)
	at io.ktor.client.statement.HttpStatement.executeUnsafe(HttpStatement.kt:104)
	at io.ktor.client.statement.HttpStatement.execute(HttpStatement.kt:43)
	at me.melijn.melijnbot.internals.services.twitter.TwitterService.postNewTweets(TwitterService.kt:396)
	at me.melijn.melijnbot.internals.services.twitter.TwitterService$service$1.invokeSuspend(TwitterService.kt:45)
	at me.melijn.melijnbot.internals.threading.RunnableTask$run$1.invokeSuspend(Task.kt:140)
	at me.melijn.melijnbot.internals.threading.TaskManager$async$1$1.invokeSuspend(TaskManager.kt:29)
	at me.melijn.melijnbot.internals.threading.Task.run(Task.kt:12)
	at me.melijn.melijnbot.internals.threading.TaskManager$async$1.invokeSuspend(TaskManager.kt:30)

To Reproduce

import kotlinx.serialization.encodeToString
import kotlinx.serialization.json.Json

Json.encodeToString("""{"avatar_url":"https://cdn.discordapp.com/avatars/384333349063491584/8adca1bddf8c5c46c7deed3edbd80d60.png","embeds":[{"color":1741274,"author":{"icon_url":"https://pbs.twimg.com/profile_images/1381321181719109633/4bpPMaer_normal.jpg","name":"Merlijn replied:","url":"https://twitter.com/@PixelHamster/status/1390719238155952129"},"description":"[@shroomizu](https://twitter.com/shroomizu) time for a pro controller","type":"rich","timestamp":"2021-05-07T17:24:39Z"}],"username":"Merijn"}""")

Expected behavior Returns the String that was passed to the encodeToString() fucntion

Environment

• Kotlin version: 1.5.0
• Library version: 1.2.0
• Kotlin platforms: JVM
• Gradle version: 7.0
• Other relevant context JRE 15.0.1

[sandwwraith]

I’ll close this as a duplicate. We’ll fix this bug and release 1.2.1 soon

[IRus]

Reproducer:

@Serializable
data class MessageDTO(
    val id: String,
    val text: String,
    val created: Long,
    val tgId: String,
)

    @Test
    fun srl() {
        val messageDTO = MessageDTO(
            id = "mg-28",
            text = """Поздравляем с наступающим 2019 годом — и объявляем о возможности присоединиться к нашей команде.

2018 стал удачным годом для Telegram. Несмотря на попытки блокировки в авторитарных странах, за это время аудитория Telegram увеличилась на треть, финансовые ресурсы — более чем в 10 раз. 

В новом 2019 году Telegram расширяет звездную команду разработчиков. Заявки от кандидатов принимаем на @jobs_bot

Желаем счастья и свободы в новом году!""",
            created = 0,
            tgId = "123"
        )
        
        Json.encodeToString(MessageDTO.serializer(), messageDTO)
    }

Index 463 out of bounds for length 463
java.lang.ArrayIndexOutOfBoundsException: Index 463 out of bounds for length 463
	at kotlinx.serialization.json.internal.JsonStringBuilder.appendStringSlowPath(JsonStringBuilder.kt:99)
	at kotlinx.serialization.json.internal.JsonStringBuilder.appendQuoted(JsonStringBuilder.kt:61)
	at kotlinx.serialization.json.internal.Composer.printQuoted(Composers.kt:42)
	at kotlinx.serialization.json.internal.StreamingJsonEncoder.encodeString(StreamingJsonEncoder.kt:203)
	at kotlinx.serialization.encoding.AbstractEncoder.encodeStringElement(AbstractEncoder.kt:65)
	at io.heapy.tgto.dao.MessageDTO$$serializer.serialize(XdMessageDao.kt:12)
	at io.heapy.tgto.dao.MessageDTO$$serializer.serialize(XdMessageDao.kt:12)
	at kotlinx.serialization.json.internal.StreamingJsonEncoder.encodeSerializableValue(StreamingJsonEncoder.kt:211)
	at kotlinx.serialization.json.Json.encodeToString(Json.kt:80)
	at io.heapy.tgto.dao.MapDbMessageDaoTest.srl(MapDbMessageDaoTest.kt:100)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	...
	at java.base/java.lang.Thread.run(Thread.java:829)