Span not found in formatting layer

[dentiny]

Bug Report

Hi team, I have met an issue with format layer, with error message "Span not found", in detail code reference here:

tracing/tracing-subscriber/src/fmt/fmt_layer.rs

Line 833 in ed3300c

let span = ctx.span(id).expect("Span not found, this is a bug");

After doing some search, I found it could be the same issue with tokio-rs/tracing-opentelemetry#86

Would like to know how you guys think about it, and whether there's any concern to skip callback when parent span not found. Thank you!

Version

v0.3.20

Platform

Linux

[hds]

I don't think that this is related to the tracing-opentelemtry issue as that is about the parent not being found, which is possible.

The expect that you linked to indicates that the new span which has just been created doesn't exist, and that really should not happen.

Are you able to provide code that reproduces the panic that you're seeing?