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Application level tracing for Rust.

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Currently, the `tracing-subscriber` prelude re-exports some traits as `__tracing_subscriber_` to avoid namespace conflicts. This is because those traits were added to the prelude before `use Trait as _` was available...

meta/breaking

## Crates * tracing-attribute (only one I think) ## Feature Request A thought for the instrument macro, but if one was thinking of a PR to allow people to add...

# Motivation Currently the `instrument` macro is rather limited, in that it can only be used to instrument functions. The main goal of this rework would be to allow instrumentation...

## Feature Request ### Crates `tracing-log` ### Motivation Large applications may use libraries or components that use a combination of the `log` crate and `tracing`. We can support better diagnostics...

kind/feature
crate/log
needs/design

Updates the requirements on [mio](https://github.com/tokio-rs/mio) to permit the latest version. Changelog Sourced from mio's changelog. 0.8.4 Added Support Registery::try_clone on wasm32-wasi (tokio-rs/mio#1576). Add docs about polling without registering event sources...

dependencies

Updates the requirements on [rand](https://github.com/rust-random/rand) to permit the latest version. Changelog Sourced from rand's changelog. [0.8.5] - 2021-08-20 Fixes Fix build on non-32/64-bit architectures (#1144) Fix "min_const_gen" feature for no_std...

dependencies

## Motivation Clean up the MSRV todos. Opening primarily for discussion on whether there is enough benefit to do the version bump yet.

## Bug Report Sublime Text 4 has a "Build" feature which can launch Rust/Cargo programs and redirect their output to its internal log viewer. This log is only in plain...

## Bug Report ### Version master branch cargo build --exmaples $ cargo --version cargo 1.47.0 (f3c7e066a 2020-08-28) ### Platform Linux 4.9 ### Crates ### Description When I run the subscriber-filter...

kind/bug
crate/subscriber

## Feature Request ### Crates tracing ### Motivation I use [`Try`](https://doc.rust-lang.org/std/ops/trait.Try.html) trait that allow to use other type than `Result` or `Option` to use `?` operator. The [instrument](https://docs.rs/tracing/latest/tracing/attr.instrument.html) have argument...