After coerceInputValues was added I get ArrayIndexOutOfBoundsException

[Merseyside]

Describe the bug
I get java.lang.ArrayIndexOutOfBoundsException when try to deserialize following json. It has started when I added coerceInputValues = true to my Json

{
  "messageId": 34190,
  "chatId": 4819,
  "dateCreate": {
    "gmtTimeUnit": {
      "type": "com.merseyside.merseyLib.time.units.Millis",
      "millis": 1760946587000
    },
    "timeZone": {
      "zoneId": "Europe/Amsterdam",
      "offset": {
        "type": "com.merseyside.merseyLib.time.units.Seconds",
        "millis": 10800000
      }
    }
  },
  "dateLastComment": null,
  "dateStatusSet": null,
  "hasNew": false,
  "headMessageId": null,
  "isPinned": false,
  "isQuiet": false,
  "lastCommentId": null,
  "allowAddComment": false,
  "orderId": null,
  "reactionId": null,
  "receiverAccountId": null,
  "replyBody": "",
  "replyMessageId": null,
  "replyAccountId": null,
  "senderAccountId": 1,
  "totalCommentCount": 0,
  "unreadCommentCount": 0,
  "viewsCount": 0,
  "status": 1,
  "reactions": [],
  "edited": false,
  "body": "body",
  "direction": "out",
  "files": [],
  "uuid": null,
  "isNewMessage": false,
  "links": [],
  "showOrderAsReply": false,
  "prevMessageId": 34189
}

@OptIn(ExperimentalSerializationApi::class)
@Serializer(forClass = ChatMessageModel::class)
object MessagesSerializer

this is my model generated by sqldelight.
public data class ChatMessageModel(
  public val messageId: Long,
  public val chatId: Long,
  public val dateCreate: ZonedTimeUnit,
  public val dateLastComment: ZonedTimeUnit?,
  public val dateStatusSet: ZonedTimeUnit?,
  public val hasNew: Boolean,
  public val headMessageId: Long?,
  public val isPinned: Boolean,
  public val isQuiet: Boolean,
  public val lastCommentId: Long?,
  public val allowAddComment: Boolean,
  public val orderId: Long?,
  public val reactionId: Long?,
  public val receiverAccountId: Long?,
  public val replyBody: String?,
  public val replyMessageId: Long?,
  public val replyAccountId: Long?,
  public val senderAccountId: Long,
  public val totalCommentCount: Long,
  public val unreadCommentCount: Long,
  public val viewsCount: Long,
  public val status: MessageStatus,
  public val reactions: ReactionStatistic,
  public val edited: Boolean,
  public val body: String,
  public val direction: MessageDirection,
  public val files: List<File>,
  public val uuid: String?,
  public val isNewMessage: Boolean,
  public val links: List<LinkModel>?,
  public val showOrderAsReply: Boolean,
  public val prevMessageId: Long?,
)

java.lang.ArrayIndexOutOfBoundsException: length=0; index=0
                                                                                                    	at kotlinx.serialization.internal.PluginGeneratedSerialDescriptor.getElementDescriptor(PluginGeneratedSerialDescriptor.kt:135)
                                                                                                    	at kotlinx.serialization.json.internal.StreamingJsonDecoder.coerceInputValue(StreamingJsonDecoder.kt:423)
                                                                                                    	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeObjectIndex(StreamingJsonDecoder.kt:231)
                                                                                                    	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeElementIndex(StreamingJsonDecoder.kt:178)
                                                                                                    	at ru.izibook.chats.db.MessagesSerializer.deserialize(MessagesSerializer.kt:7)
                                                                                                    	at ru.izibook.chats.db.MessagesSerializer.deserialize(MessagesSerializer.kt:7)
                                                                                                    	at kotlinx.serialization.json.internal.StreamingJsonDecoder.decodeSerializableValue(StreamingJsonDecoder.kt:69)
                                                                                                    	at kotlinx.serialization.json.Json.decodeFromString(Json.kt:149)
                                                                                                    	at com.merseyside.merseyLib.kotlin.serialization.SerializationKt.deserialize(Serialization.kt:50)
                                                                                                    	at com.merseyside.merseyLib.kotlin.serialization.SerializationKt.deserialize$default(Serialization.kt:46)
                                                                                                    	at ru.izibook.chats.db.DbKt$special$$inlined$getSerializableColumnAdapter$3.decode(ColumnAdapterBuilder.kt:16)
                                                                                                    	at ru.izibook.chats.db.DbKt$special$$inlined$getSerializableColumnAdapter$3.decode(ColumnAdapterBuilder.kt:12)
                                                                                                    	at ru.izibook.chats.db.model.ChatLastMessageQueries.getMessage$lambda$0(ChatLastMessageQueries.kt:20)
                                                                                                    	at ru.izibook.chats.db.model.ChatLastMessageQueries.$r8$lambda$KwmQqFJqq7_JQ3bkGGpmjqQFNLA(Unknown Source:0)
                                                                                                    	at ru.izibook.chats.db.model.ChatLastMessageQueries$$ExternalSyntheticLambda5.invoke(D8$$SyntheticClass:0)
                                                                                                    	at app.cash.sqldelight.ExecutableQuery.executeAsOneOrNull$lambda$2(Query.kt:200)

Environment

• Kotlin version: 2.2.21
• Library version: 1.9.0
• Kotlin platforms: KMP [Android]
• Gradle version: 9.1.0
• IDE version Android Studio Otter 2 Feature Drop | 2025.2.2 Canary 1

[pdvrieze]

You should look at a smaller subset, but there are some (potential) attributes that could be the issue (they cannot be validly coerced):

• status: MessageStatus = 1 - this only works if MessagesStatus is a value class wrapping an int (or has a custom serializer that reads an int)
• reactions: ReactionStatistic = emptyList() /*[]*/ - only works if ReactionStatistic is actually a list type (or custom serializer...).

It also implies that MessageDirection is an enum, but would not involve coercion.

[sandwwraith]

Duplicate of #1512. Note that we plan to deprecate @Serializer(...) feature. See #3084 for details.