trace export failing with "Missing span display name!"

[k4leung4]

failed to export to Google Cloud Trace: rpc error: code = InvalidArgument desc = Missing span display name!"

I'm seeing the above error, which seems weird, as all span should have a name defaulted when converting to proto form
https://github.com/GoogleCloudPlatform/opentelemetry-operations-go/blob/main/exporter/trace/trace_proto.go#L149-L151

not sure how it is happening

any guidance to better debug this would be appreciated, as this is running in a relatively complex system, it is not clear to me where these traces are even originating from

[dashpole]

Is it possible the span name is empty? e.g. someone did tracer.Start(ctx, "") somewhere?

[dashpole]

I can't think of any other way that would be empty