Dec 17 15:29:43.360 INFO checking shoul/rust_tutorial against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 17 15:29:43.360 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-5/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/shoul/rust_tutorial:/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" "+96d1334e567237b1507cd277938e7ae2de75ff51-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 15:29:43.794 INFO [stdout] 43b15b1e8413be480108ba85bd0c29e4f54bb5fa7cd86daf923de7eddb9fa28b
Dec 17 15:29:43.800 INFO running `"docker" "start" "-a" "43b15b1e8413be480108ba85bd0c29e4f54bb5fa7cd86daf923de7eddb9fa28b"`
Dec 17 15:29:45.402 INFO [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Dec 17 15:29:45.402 INFO [stderr] disables Cargo from automatically inferring other binary targets.
Dec 17 15:29:45.402 INFO [stderr] This inference behavior will change in the Rust 2018 edition and the following
Dec 17 15:29:45.402 INFO [stderr] files will be included as a binary target:
Dec 17 15:29:45.402 INFO [stderr] 
Dec 17 15:29:45.402 INFO [stderr] * /opt/crater/workdir/src/main.rs
Dec 17 15:29:45.402 INFO [stderr] 
Dec 17 15:29:45.402 INFO [stderr] This is likely to break cargo build or cargo test as these files may not be
Dec 17 15:29:45.402 INFO [stderr] ready to be compiled as a binary target today. You can future-proof yourself
Dec 17 15:29:45.402 INFO [stderr] and disable this warning by adding `autobins = false` to your [package]
Dec 17 15:29:45.402 INFO [stderr] section. You may also move the files to a location where Cargo would not
Dec 17 15:29:45.402 INFO [stderr] automatically infer them to be a target, such as in subfolders.
Dec 17 15:29:45.402 INFO [stderr] 
Dec 17 15:29:45.402 INFO [stderr] For more information on this warning you can consult
Dec 17 15:29:45.402 INFO [stderr] https://github.com/rust-lang/cargo/issues/5330
Dec 17 15:29:45.402 INFO [stderr]     Checking rust_tutorial v0.1.0 (/opt/crater/workdir)
Dec 17 15:29:46.212 INFO [stderr] warning: unused variable: `v2`
Dec 17 15:29:46.212 INFO [stderr]   --> src/ownership.rs:37:9
Dec 17 15:29:46.212 INFO [stderr]    |
Dec 17 15:29:46.212 INFO [stderr] 37 |     let v2 = v;
Dec 17 15:29:46.212 INFO [stderr]    |         ^^ help: consider using `_v2` instead
Dec 17 15:29:46.212 INFO [stderr]    |
Dec 17 15:29:46.212 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:29:46.212 INFO [stderr] 
Dec 17 15:29:46.240 INFO [stderr] warning: variable does not need to be mutable
Dec 17 15:29:46.240 INFO [stderr]   --> src/ownership.rs:60:9
Dec 17 15:29:46.240 INFO [stderr]    |
Dec 17 15:29:46.240 INFO [stderr] 60 |     let mut b = a;
Dec 17 15:29:46.240 INFO [stderr]    |         ----^
Dec 17 15:29:46.240 INFO [stderr]    |         |
Dec 17 15:29:46.240 INFO [stderr]    |         help: remove this `mut`
Dec 17 15:29:46.240 INFO [stderr]    |
Dec 17 15:29:46.240 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 15:29:46.240 INFO [stderr] 
Dec 17 15:29:46.789 INFO [stderr] warning: unused variable: `j`
Dec 17 15:29:46.789 INFO [stderr]   --> src/vectors.rs:34:6
Dec 17 15:29:46.789 INFO [stderr]    |
Dec 17 15:29:46.789 INFO [stderr] 34 |     let j: i32 = 0;
Dec 17 15:29:46.789 INFO [stderr]    |         ^ help: consider using `_j` instead
Dec 17 15:29:46.808 INFO [stderr]    |
Dec 17 15:29:46.809 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:29:46.809 INFO [stderr] 
Dec 17 15:29:46.932 INFO [stderr] warning: unused variable: `j`
Dec 17 15:29:46.932 INFO [stderr]   --> src/vectors.rs:34:6
Dec 17 15:29:46.932 INFO [stderr]    |
Dec 17 15:29:46.932 INFO [stderr] 34 |     let j: i32 = 0;
Dec 17 15:29:46.932 INFO [stderr]    |         ^ help: consider using `_j` instead
Dec 17 15:29:46.932 INFO [stderr]    |
Dec 17 15:29:46.932 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:29:46.932 INFO [stderr] 
Dec 17 15:29:47.176 INFO [stderr] warning: unused variable: `v2`
Dec 17 15:29:47.176 INFO [stderr]   --> src/ownership.rs:37:9
Dec 17 15:29:47.176 INFO [stderr]    |
Dec 17 15:29:47.176 INFO [stderr] 37 |     let v2 = v;
Dec 17 15:29:47.176 INFO [stderr]    |         ^^ help: consider using `_v2` instead
Dec 17 15:29:47.176 INFO [stderr]    |
Dec 17 15:29:47.176 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 17 15:29:47.176 INFO [stderr] 
Dec 17 15:29:47.178 INFO [stderr] warning: variable does not need to be mutable
Dec 17 15:29:47.178 INFO [stderr]   --> src/ownership.rs:60:9
Dec 17 15:29:47.178 INFO [stderr]    |
Dec 17 15:29:47.178 INFO [stderr] 60 |     let mut b = a;
Dec 17 15:29:47.178 INFO [stderr]    |         ----^
Dec 17 15:29:47.178 INFO [stderr]    |         |
Dec 17 15:29:47.178 INFO [stderr]    |         help: remove this `mut`
Dec 17 15:29:47.178 INFO [stderr]    |
Dec 17 15:29:47.178 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 15:29:47.178 INFO [stderr] 
Dec 17 15:29:47.240 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.88s
Dec 17 15:29:48.212 INFO running `"docker" "inspect" "43b15b1e8413be480108ba85bd0c29e4f54bb5fa7cd86daf923de7eddb9fa28b"`
Dec 17 15:29:48.530 INFO running `"docker" "rm" "-f" "43b15b1e8413be480108ba85bd0c29e4f54bb5fa7cd86daf923de7eddb9fa28b"`
Dec 17 15:29:48.782 INFO [stdout] 43b15b1e8413be480108ba85bd0c29e4f54bb5fa7cd86daf923de7eddb9fa28b