BsonFlexibleDecoder ends SerialKind.Object but does not start

[markvogelnomad]

When decoding a SerialKind.OBJECT the BsonFlexibleDecoder does not start the document read, but it does end it.

https://github.com/jershell/kbson/blob/master/src/main/kotlin/com/github/jershell/kbson/BsonFlexibleDecoder.kt#L61

This causes the following error when attempting to decode objects even if they are {} in the database:

org.bson.BsonInvalidOperationException: readEndDocument can only be called when ContextType is DOCUMENT or SCOPE_DOCUMENT, not when ContextType is TOP_LEVEL.
	at org.bson.AbstractBsonReader.throwInvalidContextType(AbstractBsonReader.java:654)
	at org.bson.AbstractBsonReader.readEndDocument(AbstractBsonReader.java:347)
	at com.github.jershell.kbson.FlexibleDecoder.endStructure(BsonFlexibleDecoder.kt:61)
	at kotlinx.serialization.internal.ObjectSerializer.deserialize(ObjectSerializer.kt:57)
	at kotlinx.serialization.encoding.Decoder$DefaultImpls.decodeSerializableValue(Decoding.kt:257)
	at kotlinx.serialization.encoding.AbstractDecoder.decodeSerializableValue(AbstractDecoder.kt:16)
	at com.application.codec.CustomCodec.decode(CustomCodec.kt:71)
        ...

[ninja-]

👀

[ninja-]

I am curious what's the reproducer from DTO point of view? or does it only affect custom serializers?

[markvogelnomad]

I mean it seems pretty obvious that the beginStructure does not account for SerialKind.OBJECT, but the endStructure does.
@ninja- Is this accounted for somewhere else that I missed?

NOTE: This may be a moot point as MongoDB has official drivers now.