Dec 03 11:18:06.556 INFO testing futures_future-0.1.1 against 1.30.1 for beta-1.31-5
Dec 03 11:18:06.556 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-3/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-3/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 11:18:06.721 INFO [stdout] 321cf6c0ce70f7de93c2f24331f0d702b6fc9399e2e6504d80269141d7b4c9a9
Dec 03 11:18:06.723 INFO running `"docker" "start" "-a" "321cf6c0ce70f7de93c2f24331f0d702b6fc9399e2e6504d80269141d7b4c9a9"`
Dec 03 11:18:07.127 INFO [stderr] usermod: no changes
Dec 03 11:18:07.159 INFO [stderr]    Compiling futures_future v0.1.1 (/source)
Dec 03 11:18:07.175 INFO [stderr] error: Edition 2018 is unstable and only available for nightly builds of rustc.
Dec 03 11:18:07.175 INFO [stderr] 
Dec 03 11:18:07.177 INFO [stderr] error: Could not compile `futures_future`.
Dec 03 11:18:07.177 INFO [stderr] 
Dec 03 11:18:07.177 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 11:18:07.178 INFO [stderr] su: No module specific data is present
Dec 03 11:18:07.562 INFO running `"docker" "inspect" "321cf6c0ce70f7de93c2f24331f0d702b6fc9399e2e6504d80269141d7b4c9a9"`
Dec 03 11:18:07.688 INFO running `"docker" "rm" "-f" "321cf6c0ce70f7de93c2f24331f0d702b6fc9399e2e6504d80269141d7b4c9a9"`
Dec 03 11:18:07.863 INFO [stdout] 321cf6c0ce70f7de93c2f24331f0d702b6fc9399e2e6504d80269141d7b4c9a9