tracing_subscriber::fmt().init() does not trace debug (does print info)

[EdmundsEcho]

Bug Report

When the tracer is built using

tracing_subscriber::fmt().init();
// or
tracing_subscriber::fmt().pretty().init(); 

... the debug tracing does not show up.

Version

tracing-subscriber = { version="0.3", features = ["env-filter", "fmt", "std"] }

cargo tree | grep tracing
│   │   │   └── tracing v0.1.29
│   │   │       ├── tracing-attributes v0.1.18 (proc-macro)
│   │   │       └── tracing-core v0.1.21
│   │   ├── tracing v0.1.29 (*)
│   │   └── tracing v0.1.29 (*)
│   │   └── tracing v0.1.29 (*)
├── tracing v0.1.29 (*)
├── tracing-subscriber v0.3.7
│   ├── tracing v0.1.29 (*)
│   ├── tracing-core v0.1.21 (*)
│   └── tracing-log v0.1.2
│       └── tracing-core v0.1.21 (*)

Platform

MacOS 12.1 on M1

Description

The following generates output

✅  tracing::info!("\n 🔑 cookie: {:?}", cookie);

Whereas the following does not

🚫  tracing::debug!("\n 🔑 cookie: {:?}", cookie);

... only when I stop using the fmt() function, does the debug trace information show-up.

✅  tracing_subscriber::fmt::init();

- E

[davidbarsky]

This is a known issue which is tracked in #1697. I'll close this issue can ask that you follow that one instead.