Using LogTracer with a tracing subscriber

[jwodder]

How can I write a program that configures a typical tracing subscriber (just using the types from tracing-subscriber) while also using tracing_log::LogTracer to capture log messages from a dependency?

I tried the following minimal code:

use tracing_subscriber::filter::LevelFilter;

fn main() {
    tracing_log::LogTracer::init().unwrap();
    tracing_subscriber::fmt()
        .with_max_level(LevelFilter::TRACE)
        .init();
    log::debug!("This is a log message.");
    tracing::debug!("This is a tracing message.");
}

on Rust 1.76 with these dependencies:

[dependencies]
log = "0.4.20"
tracing = "0.1.40"
tracing-log = "0.2.0"
tracing-subscriber = "0.3.18"

but it fails with:

thread 'main' panicked at /Users/jwodder/.cargo/registry/src/index.crates.io-6f17d22bba15001f/tracing-subscriber-0.3.18/src/fmt/mod.rs:517:14:
Unable to install global subscriber: SetLoggerError(())
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

Switching the order of the init()'s just changes the error to:

thread 'main' panicked at src/main.rs:7:36:
called `Result::unwrap()` on an `Err` value: SetLoggerError(())
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace