env::current_dir() is not updated for non-root packages in a workspace #1514
Description
cargo test and cargo bench update the working directory when running the test binary. For example, if you have a foo sub-package in its own foo directory, then cargo test -p foo updates the working directory to ./foo when running its tests.
cargo miri test -p foo -- -Zmiri-disable-isolation does not update the working directory, so it's still . rather than ./foo. This breaks tests that rely on accessing files for test data.