`make check` currently doesn't seem to work with `--enable-rust` without `--enable-cargo-online-mode`. It looks like cargo expects `CARGO_HOME` to point to the `.cargo` directory itself, not the directory containing it. Builds seem to work anyway because we `cd` to a directory where cargo can find a `.cargo` directory, even though we set `CARGO_HOME` incorrectly. This might be making Jenkins builds fail too: https://jenkins.torproject.org/job/tor-ci-linux-master-rust/ARCHITECTURE=i386,SUITE=sid/lastBuild/console ``` 20:04:05 FAIL: src/test/test_rust.sh 20:04:05 =========================== 20:04:05 20:04:05 error: attempting to make an HTTP request, but --frozen was specified 20:04:05 error: attempting to make an HTTP request, but --frozen was specified ``` This incarnation of this bug seems to be in the fix for legacy/trac#26258, but similar problems seem to exist in releases as far back as 0.3.1.