Dec 03 00:52:12.722 INFO testing narc-0.1.0 against 1.30.1 for beta-1.31-5
Dec 03 00:52:12.723 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.31-5/worker-1/1.30.1:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-1/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 00:52:12.894 INFO [stdout] b94d3b9fceb282885d6ce2f23c9ee65a6dda83744a5c5defc7f8663ee869f843
Dec 03 00:52:12.895 INFO running `"docker" "start" "-a" "b94d3b9fceb282885d6ce2f23c9ee65a6dda83744a5c5defc7f8663ee869f843"`
Dec 03 00:52:13.573 INFO [stderr] usermod: no changes
Dec 03 00:52:13.599 INFO [stderr] warning: the cargo feature `edition` is now stable and is no longer necessary to be listed in the manifest
Dec 03 00:52:13.671 INFO [stderr]    Compiling nitro_fs v0.1.0
Dec 03 00:52:13.717 INFO [stderr] error: Edition 2018 is unstable and only available for nightly builds of rustc.
Dec 03 00:52:13.717 INFO [stderr] 
Dec 03 00:52:13.726 INFO [stderr] error: Could not compile `nitro_fs`.
Dec 03 00:52:13.726 INFO [stderr] 
Dec 03 00:52:13.726 INFO [stderr] To learn more, run the command again with --verbose.
Dec 03 00:52:13.727 INFO [stderr] su: No module specific data is present
Dec 03 00:52:14.089 INFO running `"docker" "inspect" "b94d3b9fceb282885d6ce2f23c9ee65a6dda83744a5c5defc7f8663ee869f843"`
Dec 03 00:52:14.239 INFO running `"docker" "rm" "-f" "b94d3b9fceb282885d6ce2f23c9ee65a6dda83744a5c5defc7f8663ee869f843"`
Dec 03 00:52:14.503 INFO [stdout] b94d3b9fceb282885d6ce2f23c9ee65a6dda83744a5c5defc7f8663ee869f843