Coverage when spawning target/{profile}/{bin_name} in llvm-cov nextest --workspace?

[KSXGitHub]

I have integration tests that invoke the binary to test it comprehensively. It would be nice if coverage can be collected from the binary too.

Before opening this issue ticket, I have tested it by inspecting std::env::var("RUSTFLAGS") in build.rs but an Err was returned.

[taiki-e]

Binaries are supported, but coverage is not collected if the process is killed without completing (#235, limitation of LLVM/rustc.)

If it does not work, please provide a reproduction of the problem.

[taiki-e]

Before opening this issue ticket, I have tested it by inspecting std::env::var("RUSTFLAGS") in build.rs but an Err was returned.

Since Rust 1.55, Cargo does not pass the RUSTFLAGS environment variable to the build script. CARGO_ENCODED_RUSTFLAGS is passed instead. (rust-lang/cargo#9601)

[oxalica]

I have integration tests that invoke the binary to test it comprehensively. It would be nice if coverage can be collected from the binary too.

I ran into this issue but it turns out that I did execve (for some testing purpose) which clears the environment variables required for cov data generation. By inheriting current envvars, the coverage data for executables are correctly collected for me. Did you also accidentally clear envvars somehow?