pub fn init()Available on crate features fmt and std only.
Install a global tracing subscriber that listens for events and filters based on the value of the RUST_LOG environment variable.
The configuration of the subscriber initialized by this function depends on what feature flags are enabled.
If the tracing-log feature is enabled, this will also install the LogTracer to convert Log records into tracing Events.
If the env-filter feature is enabled, this is shorthand for
tracing_subscriber::fmt()
.with_env_filter(EnvFilter::from_default_env())
.init();Panics if the initialization was unsuccessful, likely because a global subscriber was already installed by another call to try_init.
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