Dec 02 03:13:59.306 INFO testing SplittyDev/zircond against 1.30.1 for beta-1.31-5
Dec 02 03:13:59.306 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-6/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/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 02 03:13:59.792 INFO [stdout] 712434537b89be4c54adb626d5911df8760d759631524d0c5003b3801977569b
Dec 02 03:13:59.794 INFO running `"docker" "start" "-a" "712434537b89be4c54adb626d5911df8760d759631524d0c5003b3801977569b"`
Dec 02 03:14:00.799 INFO [stderr] usermod: no changes
Dec 02 03:14:00.879 INFO [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
Dec 02 03:14:00.911 INFO [stderr]    Compiling ryu v0.2.5
Dec 02 03:14:00.931 INFO [stderr]    Compiling toml v0.4.6
Dec 02 03:14:03.855 INFO [stderr]    Compiling serde_json v1.0.26
Dec 02 03:14:11.115 INFO [stderr]    Compiling zircond v0.1.0 (/source)
Dec 02 03:14:11.152 INFO [stderr] error: Edition 2018 is unstable and only available for nightly builds of rustc.
Dec 02 03:14:11.152 INFO [stderr] 
Dec 02 03:14:11.154 INFO [stderr] error: Could not compile `zircond`.
Dec 02 03:14:11.154 INFO [stderr] 
Dec 02 03:14:11.154 INFO [stderr] To learn more, run the command again with --verbose.
Dec 02 03:14:11.163 INFO [stderr] su: No module specific data is present
Dec 02 03:14:12.251 INFO running `"docker" "inspect" "712434537b89be4c54adb626d5911df8760d759631524d0c5003b3801977569b"`
Dec 02 03:14:12.655 INFO running `"docker" "rm" "-f" "712434537b89be4c54adb626d5911df8760d759631524d0c5003b3801977569b"`
Dec 02 03:14:12.947 INFO [stdout] 712434537b89be4c54adb626d5911df8760d759631524d0c5003b3801977569b