cannot infer type for type parameter

[thanhdatvo]

Bug Report

Version

opentelemetry = "0.6.0"
tracing-opentelemetry = "0.5.0"

Platform

Crates

Description

I tried this code:

let telemetry = tracing_opentelemetry::layer().with_tracer(tracer);

I expected to see this happen:
No error
Instead, this happened:

[davidbarsky]

Can you add some additional code and context around this? In this case, S is a subscriber/underlying storage system for the OpenTelemetry Layer, which, idiomatically, is inferred to be a tracing_subscriber::registry::Registry. Few questions:

1. Do you have something like this code in scope of telemetry? That should force rustc to infer S correctly.
2. More generally, why is this code inside of an async block? The async block might not be needed.