Dec 19 12:29:52.727 INFO checking mmueller/advent2016 against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 12:29:52.728 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-4/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/gh/mmueller/advent2016:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 12:29:53.216 INFO [stdout] ea46fe8c70915cd1317f7f46dc5608f8a1e0de53abad84535704bc916bbdd867
Dec 19 12:29:53.256 INFO running `"docker" "start" "-a" "ea46fe8c70915cd1317f7f46dc5608f8a1e0de53abad84535704bc916bbdd867"`
Dec 19 12:29:55.325 INFO [stderr]    Compiling backtrace-sys v0.1.5
Dec 19 12:29:56.540 INFO [stderr]     Checking backtrace v0.3.0
Dec 19 12:29:57.072 INFO [stderr]     Checking error-chain v0.7.1
Dec 19 12:29:57.526 INFO [stderr]     Checking advent2016 v0.1.0 (/opt/crater/workdir)
Dec 19 12:29:58.837 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.63s
Dec 19 12:30:00.083 INFO running `"docker" "inspect" "ea46fe8c70915cd1317f7f46dc5608f8a1e0de53abad84535704bc916bbdd867"`
Dec 19 12:30:00.460 INFO running `"docker" "rm" "-f" "ea46fe8c70915cd1317f7f46dc5608f8a1e0de53abad84535704bc916bbdd867"`
Dec 19 12:30:00.844 INFO [stdout] ea46fe8c70915cd1317f7f46dc5608f8a1e0de53abad84535704bc916bbdd867