This repo is a minimal reproducible case for an issue I have with coverage not being generated when using the datatest_stable crate.

cargo install llvm-cov

1. Generate coverage

   # at root of repo
   cargo llvm-cov --html --open

2. Observe no hits in to_cover::main (despite 'Hello, world!' being printed to stdout)
3. Open tests/datatest.rs and swap the harness macro with the main function provided
4. Generate coverage again (step 1).
5. Observe hits in to_cover::main.