Dec 19 21:04:51.175 INFO checking acmumn/minnehack-blockchain-check-in against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 21:04:51.176 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/acmumn/minnehack-blockchain-check-in:/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:04:51.496 INFO [stdout] b04c0067deeb56d71f16b9bb209e5a5a936b1bf7ea7d2f3d312f7f2be2c8b5d2
Dec 19 21:04:51.498 INFO running `"docker" "start" "-a" "b04c0067deeb56d71f16b9bb209e5a5a936b1bf7ea7d2f3d312f7f2be2c8b5d2"`
Dec 19 21:04:53.900 INFO [stderr]     Checking termion v1.5.1
Dec 19 21:04:53.900 INFO [stderr]     Checking rand v0.4.1
Dec 19 21:04:53.900 INFO [stderr]     Checking arrayvec v0.4.6
Dec 19 21:04:53.900 INFO [stderr]     Checking serde_cbor v0.8.1
Dec 19 21:04:53.900 INFO [stderr]    Compiling derive-error-chain v0.10.1
Dec 19 21:04:53.900 INFO [stderr]     Checking error-chain v0.10.0
Dec 19 21:04:53.900 INFO [stderr]     Checking pretty_env_logger v0.1.1
Dec 19 21:04:58.892 INFO [stderr]     Checking tui v0.2.0
Dec 19 21:05:01.054 INFO [stderr]     Checking quickcheck v0.6.0
Dec 19 21:05:05.973 INFO [stderr]     Checking dotenv v0.10.1
Dec 19 21:05:07.190 INFO [stderr]     Checking minnehack-check-in v0.1.0 (/opt/crater/workdir)
Dec 19 21:05:10.108 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:05:10.108 INFO [stderr]   --> src/lib.rs:79:13
Dec 19 21:05:10.108 INFO [stderr]    |
Dec 19 21:05:10.109 INFO [stderr] 79 |         let mut client = Client::new_with_opts(
Dec 19 21:05:10.109 INFO [stderr]    |             ----^^^^^^
Dec 19 21:05:10.109 INFO [stderr]    |             |
Dec 19 21:05:10.109 INFO [stderr]    |             help: remove this `mut`
Dec 19 21:05:10.109 INFO [stderr]    |
Dec 19 21:05:10.109 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:05:10.109 INFO [stderr] 
Dec 19 21:05:10.212 INFO [stderr] warning: variable does not need to be mutable
Dec 19 21:05:10.212 INFO [stderr]   --> src/lib.rs:79:13
Dec 19 21:05:10.212 INFO [stderr]    |
Dec 19 21:05:10.212 INFO [stderr] 79 |         let mut client = Client::new_with_opts(
Dec 19 21:05:10.212 INFO [stderr]    |             ----^^^^^^
Dec 19 21:05:10.212 INFO [stderr]    |             |
Dec 19 21:05:10.212 INFO [stderr]    |             help: remove this `mut`
Dec 19 21:05:10.224 INFO [stderr]    |
Dec 19 21:05:10.225 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 21:05:10.225 INFO [stderr] 
Dec 19 21:05:10.844 INFO [stderr]     Checking minnehack-check-in-monitor v0.1.0 (/opt/crater/workdir/minnehack-check-in-monitor)
Dec 19 21:05:14.340 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.71s
Dec 19 21:05:15.451 INFO running `"docker" "inspect" "b04c0067deeb56d71f16b9bb209e5a5a936b1bf7ea7d2f3d312f7f2be2c8b5d2"`
Dec 19 21:05:15.702 INFO running `"docker" "rm" "-f" "b04c0067deeb56d71f16b9bb209e5a5a936b1bf7ea7d2f3d312f7f2be2c8b5d2"`
Dec 19 21:05:16.140 INFO [stdout] b04c0067deeb56d71f16b9bb209e5a5a936b1bf7ea7d2f3d312f7f2be2c8b5d2