I tried the following command line invocation:

cd src/test/cargo-rmc/simple-main/src
# Build succeed.
cargo build
# ERROR: Cannot find configuration toml at expected location: Cargo.toml
cargo rmc

with RMC version: 2021-12-27

I expected to see this happen: The command should work the same way as it works from the top folder. Cargo rmc should be able to locate the project Cargo.toml the same way cargo build does.

We should use cargo locate-project to find the correct Cargo.toml instead of trying to find it in the current directory only.