Dec 18 04:45:10.513 INFO checking YoshikuniJujo/learn_rust against master#96d1334e567237b1507cd277938e7ae2de75ff51 for pr-54252
Dec 18 04:45:10.513 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-3/master#96d1334e567237b1507cd277938e7ae2de75ff51:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/master#96d1334e567237b1507cd277938e7ae2de75ff51/gh/YoshikuniJujo/learn_rust:/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 18 04:45:10.764 INFO [stdout] 8868de2e537903ade514d229798855014052ba48740b7e8abb5b985c004d89f2
Dec 18 04:45:10.768 INFO running `"docker" "start" "-a" "8868de2e537903ade514d229798855014052ba48740b7e8abb5b985c004d89f2"`
Dec 18 04:45:11.656 INFO [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
Dec 18 04:45:12.310 INFO [stderr] warning: value assigned to `x` is never read
Dec 18 04:45:12.310 INFO [stderr]  --> src/mutability.rs:9:10
Dec 18 04:45:12.310 INFO [stderr]   |
Dec 18 04:45:12.310 INFO [stderr] 9 |     let mut x = 5;
Dec 18 04:45:12.310 INFO [stderr]   |             ^
Dec 18 04:45:12.310 INFO [stderr]   |
Dec 18 04:45:12.310 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 18 04:45:12.310 INFO [stderr] 
Dec 18 04:45:12.310 INFO [stderr] warning: variable `y` is assigned to, but never used
Dec 18 04:45:12.310 INFO [stderr]   --> src/mutability.rs:13:10
Dec 18 04:45:12.310 INFO [stderr]    |
Dec 18 04:45:12.310 INFO [stderr] 13 |     let mut y = &mut x;
Dec 18 04:45:12.310 INFO [stderr]    |             ^
Dec 18 04:45:12.311 INFO [stderr]    |
Dec 18 04:45:12.312 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 04:45:12.312 INFO [stderr]    = note: consider using `_y` instead
Dec 18 04:45:12.312 INFO [stderr] 
Dec 18 04:45:12.312 INFO [stderr] warning: value assigned to `y` is never read
Dec 18 04:45:12.312 INFO [stderr]   --> src/mutability.rs:14:2
Dec 18 04:45:12.312 INFO [stderr]    |
Dec 18 04:45:12.312 INFO [stderr] 14 |     y = &mut z;
Dec 18 04:45:12.312 INFO [stderr]    |     ^
Dec 18 04:45:12.312 INFO [stderr] 
Dec 18 04:45:12.316 INFO [stderr] warning: field is never used: `x`
Dec 18 04:45:12.316 INFO [stderr]  --> src/mutability.rs:4:2
Dec 18 04:45:12.316 INFO [stderr]   |
Dec 18 04:45:12.316 INFO [stderr] 4 |     x: i32,
Dec 18 04:45:12.316 INFO [stderr]   |     ^^^^^^
Dec 18 04:45:12.316 INFO [stderr]   |
Dec 18 04:45:12.316 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 04:45:12.316 INFO [stderr] 
Dec 18 04:45:12.880 INFO [stderr] warning: value assigned to `x` is never read
Dec 18 04:45:12.880 INFO [stderr]  --> src/mutability.rs:9:10
Dec 18 04:45:12.880 INFO [stderr]   |
Dec 18 04:45:12.880 INFO [stderr] 9 |     let mut x = 5;
Dec 18 04:45:12.880 INFO [stderr]   |             ^
Dec 18 04:45:12.888 INFO [stderr]   |
Dec 18 04:45:12.888 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 18 04:45:12.888 INFO [stderr] 
Dec 18 04:45:12.888 INFO [stderr] warning: variable `y` is assigned to, but never used
Dec 18 04:45:12.888 INFO [stderr]   --> src/mutability.rs:13:10
Dec 18 04:45:12.888 INFO [stderr]    |
Dec 18 04:45:12.888 INFO [stderr] 13 |     let mut y = &mut x;
Dec 18 04:45:12.888 INFO [stderr]    |             ^
Dec 18 04:45:12.888 INFO [stderr]    |
Dec 18 04:45:12.888 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 18 04:45:12.888 INFO [stderr]    = note: consider using `_y` instead
Dec 18 04:45:12.888 INFO [stderr] 
Dec 18 04:45:12.888 INFO [stderr] warning: value assigned to `y` is never read
Dec 18 04:45:12.888 INFO [stderr]   --> src/mutability.rs:14:2
Dec 18 04:45:12.888 INFO [stderr]    |
Dec 18 04:45:12.888 INFO [stderr] 14 |     y = &mut z;
Dec 18 04:45:12.888 INFO [stderr]    |     ^
Dec 18 04:45:12.888 INFO [stderr] 
Dec 18 04:45:12.896 INFO [stderr] warning: field is never used: `x`
Dec 18 04:45:12.896 INFO [stderr]  --> src/mutability.rs:4:2
Dec 18 04:45:12.896 INFO [stderr]   |
Dec 18 04:45:12.896 INFO [stderr] 4 |     x: i32,
Dec 18 04:45:12.896 INFO [stderr]   |     ^^^^^^
Dec 18 04:45:12.916 INFO [stderr]   |
Dec 18 04:45:12.916 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 18 04:45:12.916 INFO [stderr] 
Dec 18 04:45:14.869 INFO [stderr] warning: function is never used: `foo`
Dec 18 04:45:14.869 INFO [stderr]   --> src/ownership.rs:26:1
Dec 18 04:45:14.869 INFO [stderr]    |
Dec 18 04:45:14.869 INFO [stderr] 26 | fn foo(v: Vec<i32>) -> Vec<i32> {
Dec 18 04:45:14.869 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:45:14.869 INFO [stderr]    |
Dec 18 04:45:14.869 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 04:45:14.869 INFO [stderr] 
Dec 18 04:45:15.084 INFO [stderr] warning: function is never used: `foo`
Dec 18 04:45:15.084 INFO [stderr]   --> src/ownership.rs:26:1
Dec 18 04:45:15.084 INFO [stderr]    |
Dec 18 04:45:15.084 INFO [stderr] 26 | fn foo(v: Vec<i32>) -> Vec<i32> {
Dec 18 04:45:15.084 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 18 04:45:15.084 INFO [stderr]    |
Dec 18 04:45:15.084 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 18 04:45:15.084 INFO [stderr] 
Dec 18 04:45:15.148 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.52s
Dec 18 04:45:15.704 INFO running `"docker" "inspect" "8868de2e537903ade514d229798855014052ba48740b7e8abb5b985c004d89f2"`
Dec 18 04:45:15.834 INFO running `"docker" "rm" "-f" "8868de2e537903ade514d229798855014052ba48740b7e8abb5b985c004d89f2"`
Dec 18 04:45:16.028 INFO [stdout] 8868de2e537903ade514d229798855014052ba48740b7e8abb5b985c004d89f2