Parsing to data class with many values gives random result

Found sooo strange behaviour. I have data class with ~100 values in it. When I’m parsing a string (json.parse(class.serializer(), someString)) or string -> JsonArray -> JsonElement -> data class (json.fromJson(class.serializer(), jsonElement)) values in data class are filled randomly. Some of them located on their places but some of them missing. So, take a look at the code:

val s =  """{"value10":"Anything","value11":3456.7,"value33":"SomeString","value26":0.123,"value38":"2019-02-15T07:58:41.519Z"}"""
        println("SHOULD BE THIS: $s")
        println("BUT GOT THIS: " + json.parse(Testing.serializer(), s))


@Serializable
data class Testing (
        @Optional
        val value1: String? = null,
        @Optional
        val value2: String? = null,
        @Optional
        val value3: String? = null,
        @Optional
        val value4: String? = null,
        @Optional
        val value5: String? = null,
        @Optional
        val value6: Double? = null,
        @Optional
        val value7: Double? = null,
        @Optional
        val value8: Double? = null,
        @Optional
        val value9: Double? = null,
        @Optional
        val value10: String? = null,
        @Optional
        val value11: Double? = null,
        @Optional
        val value12: Double? = null,
        @Optional
        val value13: Double? = null,
        @Optional
        val value14: Boolean = false,
        @Optional
        val value15: Boolean = false,
        @Optional
        val value16: Double? = null,
        @Optional
        val value17: Double? = null,
        @Optional
        val value18: Double? = null,
        @Optional
        val value19: Double? = null,
        @Optional
        val value20: Double? = null,
        @Optional
        val value21: Double? = null,
        @Optional
        val value22: Double? = null,
        @Optional
        val value23: Long? = null,
        @Optional
        val value24: Long? = null,
        @Optional
        val value25: Long? = null,
        @Optional
        val value26: Double? = null,
        @Optional
        val value27: Double? = null,
        @Optional
        val value28: Double? = null,
        @Optional
        val value29: Double? = null,
        @Optional
        val value30: Double? = null,
        @Optional
        val value31: Double? = null,
        @Optional
        val value32: Double? = null,
        @Optional
        val value33: String? = null,
        @Optional
        val value34: Double? = null,
        @Optional
        val value35: Double? = null,
        @Optional
        val value36: Double? = null,
        @Optional
        val value37: Double? = null,
        @Optional
        val value38: String? = null)

SHOULD BE THIS: {"value10":"Anything","value11":3456.7,"value33":"SomeString","value26":0.123,"value38":"2019-02-15T07:58:41.519Z"}
    BUT GOT THIS: Testing(value1=null, value2=null, value3=null, value4=null, value5=null, value6=null, value7=null, value8=null, value9=null, value10=Anything, value11=3456.7, value12=null, value13=null, value14=false, value15=false, value16=null, value17=null, value18=null, value19=null, value20=null, value21=null, value22=null, value23=null, value24=null, value25=null, value26=0.123, value27=null, value28=null, value29=null, value30=null, value31=null, value32=null, value33=null, value34=null, value35=null, value36=null, value37=null, value38=null)

Now look at value33 and value38. They are null but shouldn’t be. Other values on their places. So it happens really randomly. In my situation application retrieves data via web socket and some values are present right now but in next second other values will be present. And some values after parsing are missing. Its not the same every time. Is it a bug? Or feature?😃

[sandwwraith]

Fixed with #164 in 1.3.30

[q-litzler]

I’m having the same issue, it would help tremendously if this could be fixed soon ! Is there any workaround in the meantime ? Thanks a lot