Dec 19 15:38:16.397 INFO checking irazorx1/markov_chain against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 15:38:16.397 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-1/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/gh/irazorx1/markov_chain:/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 15:38:16.654 INFO [stdout] 2b3919fcc7ca75140cfe3edcb3f69f82de01a2ee46aa623c402607aadf2e3778
Dec 19 15:38:16.658 INFO running `"docker" "start" "-a" "2b3919fcc7ca75140cfe3edcb3f69f82de01a2ee46aa623c402607aadf2e3778"`
Dec 19 15:38:17.299 INFO [stderr]     Checking markov_chain v0.1.0 (/opt/crater/workdir)
Dec 19 15:38:17.460 INFO [stderr] warning: unused import: `std::io`
Dec 19 15:38:17.460 INFO [stderr]  --> src/main.rs:6:5
Dec 19 15:38:17.461 INFO [stderr]   |
Dec 19 15:38:17.461 INFO [stderr] 6 | use std::io;
Dec 19 15:38:17.461 INFO [stderr]   |     ^^^^^^^
Dec 19 15:38:17.461 INFO [stderr]   |
Dec 19 15:38:17.461 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:38:17.461 INFO [stderr] 
Dec 19 15:38:17.461 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 19 15:38:17.461 INFO [stderr]  --> src/main.rs:7:5
Dec 19 15:38:17.461 INFO [stderr]   |
Dec 19 15:38:17.461 INFO [stderr] 7 | use std::io::prelude::*;
Dec 19 15:38:17.461 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:17.461 INFO [stderr] 
Dec 19 15:38:17.461 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 15:38:17.461 INFO [stderr]  --> src/main.rs:8:5
Dec 19 15:38:17.461 INFO [stderr]   |
Dec 19 15:38:17.461 INFO [stderr] 8 | use std::fs::File;
Dec 19 15:38:17.461 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 15:38:17.461 INFO [stderr] 
Dec 19 15:38:17.469 INFO [stderr] warning: unused import: `std::io`
Dec 19 15:38:17.469 INFO [stderr]  --> src/main.rs:6:5
Dec 19 15:38:17.469 INFO [stderr]   |
Dec 19 15:38:17.469 INFO [stderr] 6 | use std::io;
Dec 19 15:38:17.469 INFO [stderr]   |     ^^^^^^^
Dec 19 15:38:17.469 INFO [stderr]   |
Dec 19 15:38:17.469 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:38:17.469 INFO [stderr] 
Dec 19 15:38:17.469 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 19 15:38:17.469 INFO [stderr]  --> src/main.rs:7:5
Dec 19 15:38:17.469 INFO [stderr]   |
Dec 19 15:38:17.469 INFO [stderr] 7 | use std::io::prelude::*;
Dec 19 15:38:17.469 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:17.469 INFO [stderr] 
Dec 19 15:38:17.469 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 15:38:17.469 INFO [stderr]  --> src/main.rs:8:5
Dec 19 15:38:17.469 INFO [stderr]   |
Dec 19 15:38:17.469 INFO [stderr] 8 | use std::fs::File;
Dec 19 15:38:17.469 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 15:38:17.469 INFO [stderr] 
Dec 19 15:38:17.523 INFO [stderr] warning: the feature `fs_read_write` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 15:38:17.523 INFO [stderr]  --> src/main.rs:1:12
Dec 19 15:38:17.523 INFO [stderr]   |
Dec 19 15:38:17.524 INFO [stderr] 1 | #![feature(fs_read_write)]
Dec 19 15:38:17.524 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 19 15:38:17.524 INFO [stderr]   |
Dec 19 15:38:17.524 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 15:38:17.524 INFO [stderr] 
Dec 19 15:38:17.563 INFO [stderr] warning: the feature `fs_read_write` has been stable since 1.26.0 and no longer requires an attribute to enable
Dec 19 15:38:17.563 INFO [stderr]  --> src/main.rs:1:12
Dec 19 15:38:17.563 INFO [stderr]   |
Dec 19 15:38:17.563 INFO [stderr] 1 | #![feature(fs_read_write)]
Dec 19 15:38:17.563 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 19 15:38:17.563 INFO [stderr]   |
Dec 19 15:38:17.563 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 15:38:17.563 INFO [stderr] 
Dec 19 15:38:17.563 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.29s
Dec 19 15:38:17.837 INFO running `"docker" "inspect" "2b3919fcc7ca75140cfe3edcb3f69f82de01a2ee46aa623c402607aadf2e3778"`
Dec 19 15:38:17.924 INFO running `"docker" "rm" "-f" "2b3919fcc7ca75140cfe3edcb3f69f82de01a2ee46aa623c402607aadf2e3778"`
Dec 19 15:38:18.021 INFO [stdout] 2b3919fcc7ca75140cfe3edcb3f69f82de01a2ee46aa623c402607aadf2e3778