Dec 19 15:38:14.705 INFO checking irazorx1/markov_chain against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 15:38:14.705 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-2/try#e70472fc501b855c9080f3772432c10fe20b8866:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/try#e70472fc501b855c9080f3772432c10fe20b8866/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 15:38:15.188 INFO [stdout] ac3c0226624a82456d4017c3792c6aed1ecb68c5d42c6981797e0c649a80c0e7
Dec 19 15:38:15.194 INFO running `"docker" "start" "-a" "ac3c0226624a82456d4017c3792c6aed1ecb68c5d42c6981797e0c649a80c0e7"`
Dec 19 15:38:16.373 INFO [stderr]     Checking markov_chain v0.1.0 (/opt/crater/workdir)
Dec 19 15:38:16.535 INFO [stderr] warning: unused import: `std::io`
Dec 19 15:38:16.539 INFO [stderr]  --> src/main.rs:6:5
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr] 6 | use std::io;
Dec 19 15:38:16.539 INFO [stderr]   |     ^^^^^^^
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:38:16.539 INFO [stderr] 
Dec 19 15:38:16.539 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 19 15:38:16.539 INFO [stderr]  --> src/main.rs:7:5
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr] 7 | use std::io::prelude::*;
Dec 19 15:38:16.539 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:16.539 INFO [stderr] 
Dec 19 15:38:16.539 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 15:38:16.539 INFO [stderr]  --> src/main.rs:8:5
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr] 8 | use std::fs::File;
Dec 19 15:38:16.539 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 15:38:16.539 INFO [stderr] 
Dec 19 15:38:16.539 INFO [stderr] warning: unused import: `std::io`
Dec 19 15:38:16.539 INFO [stderr]  --> src/main.rs:6:5
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr] 6 | use std::io;
Dec 19 15:38:16.539 INFO [stderr]   |     ^^^^^^^
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr]   = note: #[warn(unused_imports)] on by default
Dec 19 15:38:16.539 INFO [stderr] 
Dec 19 15:38:16.539 INFO [stderr] warning: unused import: `std::io::prelude::*`
Dec 19 15:38:16.539 INFO [stderr]  --> src/main.rs:7:5
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr] 7 | use std::io::prelude::*;
Dec 19 15:38:16.539 INFO [stderr]   |     ^^^^^^^^^^^^^^^^^^^
Dec 19 15:38:16.539 INFO [stderr] 
Dec 19 15:38:16.539 INFO [stderr] warning: unused import: `std::fs::File`
Dec 19 15:38:16.539 INFO [stderr]  --> src/main.rs:8:5
Dec 19 15:38:16.539 INFO [stderr]   |
Dec 19 15:38:16.539 INFO [stderr] 8 | use std::fs::File;
Dec 19 15:38:16.539 INFO [stderr]   |     ^^^^^^^^^^^^^
Dec 19 15:38:16.539 INFO [stderr] 
Dec 19 15:38:16.605 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 15:38:16.605 INFO [stderr]  --> src/main.rs:1:12
Dec 19 15:38:16.605 INFO [stderr]   |
Dec 19 15:38:16.605 INFO [stderr] 1 | #![feature(fs_read_write)]
Dec 19 15:38:16.605 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 19 15:38:16.605 INFO [stderr]   |
Dec 19 15:38:16.605 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 15:38:16.605 INFO [stderr] 
Dec 19 15:38:16.605 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 15:38:16.605 INFO [stderr]  --> src/main.rs:1:12
Dec 19 15:38:16.605 INFO [stderr]   |
Dec 19 15:38:16.605 INFO [stderr] 1 | #![feature(fs_read_write)]
Dec 19 15:38:16.605 INFO [stderr]   |            ^^^^^^^^^^^^^
Dec 19 15:38:16.605 INFO [stderr]   |
Dec 19 15:38:16.605 INFO [stderr]   = note: #[warn(stable_features)] on by default
Dec 19 15:38:16.605 INFO [stderr] 
Dec 19 15:38:16.620 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.26s
Dec 19 15:38:16.909 INFO running `"docker" "inspect" "ac3c0226624a82456d4017c3792c6aed1ecb68c5d42c6981797e0c649a80c0e7"`
Dec 19 15:38:17.004 INFO running `"docker" "rm" "-f" "ac3c0226624a82456d4017c3792c6aed1ecb68c5d42c6981797e0c649a80c0e7"`
Dec 19 15:38:17.129 INFO [stdout] ac3c0226624a82456d4017c3792c6aed1ecb68c5d42c6981797e0c649a80c0e7