Macro trace_report 

macro_rules! trace_report {
    ($err:expr) => { ... };
    ($err:expr, $($rest:tt)*) => { ... };
}

Available on crate feature tracing only.

Log a report for err at level TRACE (or higher if it is a bug).

Examples:

use tor_error::trace_report;
trace_report!(err, "Cheese exhausted (ephemeral)");
trace_report!(err, "Unable to parse message {:?}", msg);