Encoding value classes fails in Protocol Buffers

[ScottPeterJohnson]

Describe the bug
Attempting to encode value classes with default generated serializers fails using Protocol Buffers.

To Reproduce

fun main(){
    ProtoBuf {}.encodeToByteArray(Example(1))
}
@Serializable
@JvmInline
value class Example(val raw : Int)

Expected behavior
Encodes correctly as the base type like e.g. json does.
Currently gives:
Exception in thread "main" kotlinx.serialization.SerializationException: No tag in stack for requested element
at kotlinx.serialization.protobuf.internal.ProtobufTaggedBase.popTag(ProtobufTaggedBase.kt:55)
at kotlinx.serialization.protobuf.internal.ProtobufTaggedEncoder.encodeInline(ProtobufTaggedEncoder.kt:178)

Possibly related:
#1774

Workaround:
Write a custom serializer:

fun main(){
    ProtoBuf {}.encodeToByteArray(Example(1))
}

@JvmInline
@Serializable(with = ExampleSerializer::class)
value class Example(val raw : Int)
object ExampleSerializer : KSerializer<Example> {
    override val descriptor: SerialDescriptor
        get() = Int.serializer().descriptor
    override fun serialize(
        encoder: Encoder,
        value: Example
    ) {
        encoder.encodeInt(value.raw)
    }

    override fun deserialize(decoder: Decoder): Example {
        return Example(decoder.decodeInt())
    }
}

Environment

• Kotlin version: 2.2.0
• Library version: 1.9.0
• Kotlin platforms: JVM
• Gradle version: 8