Dec 03 05:15:22.564 INFO testing i3-workspace-groups-0.1.0 against 1.30.1 for beta-1.31-5
Dec 03 05:15:22.564 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-2/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-2/beta-1.31-5/1.30.1:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +1.30.1 build --frozen" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 03 05:15:22.711 INFO [stdout] 2e73673986d9d1aafe486eba10ba1ea398b277e31431afb4fc681ad40a4e34e5
Dec 03 05:15:22.714 INFO running `"docker" "start" "-a" "2e73673986d9d1aafe486eba10ba1ea398b277e31431afb4fc681ad40a4e34e5"`
Dec 03 05:15:23.235 INFO [stderr] usermod: no changes
Dec 03 05:15:23.433 INFO [stderr]    Compiling i3ipc v0.9.0
Dec 03 05:15:26.669 INFO [stderr]    Compiling i3-workspace-groups v0.1.0 (/source)
Dec 03 05:15:26.718 INFO [stderr] error: Edition 2018 is unstable and only available for nightly builds of rustc.
Dec 03 05:15:26.718 INFO [stderr] 
Dec 03 05:15:26.724 INFO [stderr] error: Could not compile `i3-workspace-groups`.
Dec 03 05:15:26.724 INFO [stderr] 
Dec 03 05:15:26.724 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 05:15:26.726 INFO [stderr] su: No module specific data is present
Dec 03 05:15:27.607 INFO running `"docker" "inspect" "2e73673986d9d1aafe486eba10ba1ea398b277e31431afb4fc681ad40a4e34e5"`
Dec 03 05:15:27.836 INFO running `"docker" "rm" "-f" "2e73673986d9d1aafe486eba10ba1ea398b277e31431afb4fc681ad40a4e34e5"`
Dec 03 05:15:28.017 INFO [stdout] 2e73673986d9d1aafe486eba10ba1ea398b277e31431afb4fc681ad40a4e34e5