With nightly Rust, tests are run on separate threads even if --test-threads=1. It seems that a new thread is created for each test now, while they were previously run on the main thread if --test-threads=1. This breaks testing for jlrs, which depends on all tests running on the same thread. The underlying reason for this is that Julia can only be initialized once during a process's lifetime, and access is limited to the thread that initialized it.

My expectation is that --test-threads runs all tests on the same thread, or that I set use some other flag to achieve this.

Rust version: 1286ee2 2022-11-05