set_global_default use

[kellytk]

If I move the execution of set_global_default from main() into another function, it ceases registering trace events. How should it be correctly done?

[foresterre]

Without the code this is difficult to answer, however it may be that a guard returned from a writer does not live long enough. By moving the guard into another function f, it will at most live as long as f and be dropped at the end of the scope of f. If that's the case, you may want to look at this answer: #1494 (comment)

Driving into the code behind set_global_default [1], I would not expect this to occur because of moving just set_global_default. The set_global_default set the default Dispatch as a static field for the whole process.

[1]

tracing/tracing-core/src/dispatch.rs

Line 302 in a1868ea

pub fn set_global_default(dispatcher: Dispatch) -> Result<(), SetGlobalDefaultError> {

[kellytk]

Thank you for the explanation and pointer. Returning WorkerGuard from the function and persisting it in main() with

let _ = init_tracing();

was indeed the solution.