Dec 19 08:53:33.826 INFO checking shoul/rust_tutorial against try#e70472fc501b855c9080f3772432c10fe20b8866 for pr-56955
Dec 19 08:53:33.826 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/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" "+e70472fc501b855c9080f3772432c10fe20b8866-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 08:53:34.297 INFO [stdout] 8a031331a7de2fc553b9dd4ca7186cd9cdaf82ea398172cad2c7b72e8631191d
Dec 19 08:53:34.302 INFO running `"docker" "start" "-a" "8a031331a7de2fc553b9dd4ca7186cd9cdaf82ea398172cad2c7b72e8631191d"`
Dec 19 08:53:36.099 INFO [stderr] warning: An explicit [[bin]] section is specified in Cargo.toml which currently
Dec 19 08:53:36.099 INFO [stderr] disables Cargo from automatically inferring other binary targets.
Dec 19 08:53:36.099 INFO [stderr] This inference behavior will change in the Rust 2018 edition and the following
Dec 19 08:53:36.099 INFO [stderr] files will be included as a binary target:
Dec 19 08:53:36.099 INFO [stderr] 
Dec 19 08:53:36.099 INFO [stderr] * /opt/crater/workdir/src/main.rs
Dec 19 08:53:36.099 INFO [stderr] 
Dec 19 08:53:36.099 INFO [stderr] This is likely to break cargo build or cargo test as these files may not be
Dec 19 08:53:36.099 INFO [stderr] ready to be compiled as a binary target today. You can future-proof yourself
Dec 19 08:53:36.099 INFO [stderr] and disable this warning by adding `autobins = false` to your [package]
Dec 19 08:53:36.099 INFO [stderr] section. You may also move the files to a location where Cargo would not
Dec 19 08:53:36.099 INFO [stderr] automatically infer them to be a target, such as in subfolders.
Dec 19 08:53:36.099 INFO [stderr] 
Dec 19 08:53:36.099 INFO [stderr] For more information on this warning you can consult
Dec 19 08:53:36.099 INFO [stderr] https://github.com/rust-lang/cargo/issues/5330
Dec 19 08:53:36.101 INFO [stderr]     Checking rust_tutorial v0.1.0 (/opt/crater/workdir)
Dec 19 08:53:36.552 INFO [stderr] warning: unused variable: `v2`
Dec 19 08:53:36.553 INFO [stderr]   --> src/ownership.rs:37:9
Dec 19 08:53:36.553 INFO [stderr]    |
Dec 19 08:53:36.553 INFO [stderr] 37 |     let v2 = v;
Dec 19 08:53:36.553 INFO [stderr]    |         ^^ help: consider using `_v2` instead
Dec 19 08:53:36.554 INFO [stderr]    |
Dec 19 08:53:36.554 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 08:53:36.554 INFO [stderr] 
Dec 19 08:53:36.595 INFO [stderr] warning: variable does not need to be mutable
Dec 19 08:53:36.595 INFO [stderr]   --> src/ownership.rs:60:9
Dec 19 08:53:36.595 INFO [stderr]    |
Dec 19 08:53:36.595 INFO [stderr] 60 |     let mut b = a;
Dec 19 08:53:36.595 INFO [stderr]    |         ----^
Dec 19 08:53:36.595 INFO [stderr]    |         |
Dec 19 08:53:36.595 INFO [stderr]    |         help: remove this `mut`
Dec 19 08:53:36.595 INFO [stderr]    |
Dec 19 08:53:36.595 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 08:53:36.595 INFO [stderr] 
Dec 19 08:53:37.112 INFO [stderr] warning: unused variable: `j`
Dec 19 08:53:37.112 INFO [stderr]   --> src/vectors.rs:34:6
Dec 19 08:53:37.112 INFO [stderr]    |
Dec 19 08:53:37.112 INFO [stderr] 34 |     let j: i32 = 0;
Dec 19 08:53:37.112 INFO [stderr]    |         ^ help: consider using `_j` instead
Dec 19 08:53:37.112 INFO [stderr]    |
Dec 19 08:53:37.112 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 08:53:37.112 INFO [stderr] 
Dec 19 08:53:37.180 INFO [stderr] warning: unused variable: `j`
Dec 19 08:53:37.184 INFO [stderr]   --> src/vectors.rs:34:6
Dec 19 08:53:37.184 INFO [stderr]    |
Dec 19 08:53:37.184 INFO [stderr] 34 |     let j: i32 = 0;
Dec 19 08:53:37.184 INFO [stderr]    |         ^ help: consider using `_j` instead
Dec 19 08:53:37.210 INFO [stderr]    |
Dec 19 08:53:37.210 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 08:53:37.210 INFO [stderr] 
Dec 19 08:53:37.495 INFO [stderr] warning: unused variable: `v2`
Dec 19 08:53:37.496 INFO [stderr]   --> src/ownership.rs:37:9
Dec 19 08:53:37.496 INFO [stderr]    |
Dec 19 08:53:37.496 INFO [stderr] 37 |     let v2 = v;
Dec 19 08:53:37.498 INFO [stderr]    |         ^^ help: consider using `_v2` instead
Dec 19 08:53:37.498 INFO [stderr]    |
Dec 19 08:53:37.498 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 08:53:37.498 INFO [stderr] 
Dec 19 08:53:37.539 INFO [stderr] warning: variable does not need to be mutable
Dec 19 08:53:37.539 INFO [stderr]   --> src/ownership.rs:60:9
Dec 19 08:53:37.539 INFO [stderr]    |
Dec 19 08:53:37.539 INFO [stderr] 60 |     let mut b = a;
Dec 19 08:53:37.539 INFO [stderr]    |         ----^
Dec 19 08:53:37.539 INFO [stderr]    |         |
Dec 19 08:53:37.539 INFO [stderr]    |         help: remove this `mut`
Dec 19 08:53:37.539 INFO [stderr]    |
Dec 19 08:53:37.539 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 19 08:53:37.539 INFO [stderr] 
Dec 19 08:53:37.772 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.71s
Dec 19 08:53:38.782 INFO running `"docker" "inspect" "8a031331a7de2fc553b9dd4ca7186cd9cdaf82ea398172cad2c7b72e8631191d"`
Dec 19 08:53:39.130 INFO running `"docker" "rm" "-f" "8a031331a7de2fc553b9dd4ca7186cd9cdaf82ea398172cad2c7b72e8631191d"`
Dec 19 08:53:39.552 INFO [stdout] 8a031331a7de2fc553b9dd4ca7186cd9cdaf82ea398172cad2c7b72e8631191d