Dec 19 21:13:13.147 INFO checking YoshikuniJujo/learn_rust against master#d99a320cba42f661aebfa1293b7b2ec3603dda75 for pr-56955
Dec 19 21:13:13.147 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56955/worker-7/master#d99a320cba42f661aebfa1293b7b2ec3603dda75:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-56955/sources/master#d99a320cba42f661aebfa1293b7b2ec3603dda75/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" "+d99a320cba42f661aebfa1293b7b2ec3603dda75-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 19 21:13:13.452 INFO [stdout] 7b78cafc3c10e479472d7f27de29f27b1437ac444d6f65405cefac9ca378c58c
Dec 19 21:13:13.458 INFO running `"docker" "start" "-a" "7b78cafc3c10e479472d7f27de29f27b1437ac444d6f65405cefac9ca378c58c"`
Dec 19 21:13:14.377 INFO [stderr]     Checking learn_rust v0.1.0 (/opt/crater/workdir)
Dec 19 21:13:15.240 INFO [stderr] warning: value assigned to `x` is never read
Dec 19 21:13:15.240 INFO [stderr]  --> src/mutability.rs:9:10
Dec 19 21:13:15.240 INFO [stderr]   |
Dec 19 21:13:15.240 INFO [stderr] 9 |     let mut x = 5;
Dec 19 21:13:15.240 INFO [stderr]   |             ^
Dec 19 21:13:15.240 INFO [stderr]   |
Dec 19 21:13:15.240 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 21:13:15.241 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 21:13:15.241 INFO [stderr] 
Dec 19 21:13:15.241 INFO [stderr] warning: variable `y` is assigned to, but never used
Dec 19 21:13:15.241 INFO [stderr]   --> src/mutability.rs:13:10
Dec 19 21:13:15.241 INFO [stderr]    |
Dec 19 21:13:15.241 INFO [stderr] 13 |     let mut y = &mut x;
Dec 19 21:13:15.241 INFO [stderr]    |             ^
Dec 19 21:13:15.241 INFO [stderr]    |
Dec 19 21:13:15.241 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:13:15.241 INFO [stderr]    = note: consider using `_y` instead
Dec 19 21:13:15.241 INFO [stderr] 
Dec 19 21:13:15.241 INFO [stderr] warning: value assigned to `y` is never read
Dec 19 21:13:15.241 INFO [stderr]   --> src/mutability.rs:14:2
Dec 19 21:13:15.241 INFO [stderr]    |
Dec 19 21:13:15.241 INFO [stderr] 14 |     y = &mut z;
Dec 19 21:13:15.241 INFO [stderr]    |     ^
Dec 19 21:13:15.241 INFO [stderr]    |
Dec 19 21:13:15.241 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 21:13:15.241 INFO [stderr] 
Dec 19 21:13:15.241 INFO [stderr] warning: field is never used: `x`
Dec 19 21:13:15.241 INFO [stderr]  --> src/mutability.rs:4:2
Dec 19 21:13:15.241 INFO [stderr]   |
Dec 19 21:13:15.241 INFO [stderr] 4 |     x: i32,
Dec 19 21:13:15.241 INFO [stderr]   |     ^^^^^^
Dec 19 21:13:15.241 INFO [stderr]   |
Dec 19 21:13:15.241 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:13:15.241 INFO [stderr] 
Dec 19 21:13:15.524 INFO [stderr] warning: value assigned to `x` is never read
Dec 19 21:13:15.524 INFO [stderr]  --> src/mutability.rs:9:10
Dec 19 21:13:15.524 INFO [stderr]   |
Dec 19 21:13:15.524 INFO [stderr] 9 |     let mut x = 5;
Dec 19 21:13:15.524 INFO [stderr]   |             ^
Dec 19 21:13:15.524 INFO [stderr]   |
Dec 19 21:13:15.524 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 19 21:13:15.524 INFO [stderr]   = help: maybe it is overwritten before being read?
Dec 19 21:13:15.524 INFO [stderr] 
Dec 19 21:13:15.525 INFO [stderr] warning: variable `y` is assigned to, but never used
Dec 19 21:13:15.525 INFO [stderr]   --> src/mutability.rs:13:10
Dec 19 21:13:15.525 INFO [stderr]    |
Dec 19 21:13:15.525 INFO [stderr] 13 |     let mut y = &mut x;
Dec 19 21:13:15.525 INFO [stderr]    |             ^
Dec 19 21:13:15.525 INFO [stderr]    |
Dec 19 21:13:15.525 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 19 21:13:15.525 INFO [stderr]    = note: consider using `_y` instead
Dec 19 21:13:15.525 INFO [stderr] 
Dec 19 21:13:15.525 INFO [stderr] warning: value assigned to `y` is never read
Dec 19 21:13:15.525 INFO [stderr]   --> src/mutability.rs:14:2
Dec 19 21:13:15.525 INFO [stderr]    |
Dec 19 21:13:15.525 INFO [stderr] 14 |     y = &mut z;
Dec 19 21:13:15.525 INFO [stderr]    |     ^
Dec 19 21:13:15.525 INFO [stderr]    |
Dec 19 21:13:15.525 INFO [stderr]    = help: maybe it is overwritten before being read?
Dec 19 21:13:15.525 INFO [stderr] 
Dec 19 21:13:15.525 INFO [stderr] warning: field is never used: `x`
Dec 19 21:13:15.525 INFO [stderr]  --> src/mutability.rs:4:2
Dec 19 21:13:15.525 INFO [stderr]   |
Dec 19 21:13:15.525 INFO [stderr] 4 |     x: i32,
Dec 19 21:13:15.525 INFO [stderr]   |     ^^^^^^
Dec 19 21:13:15.525 INFO [stderr]   |
Dec 19 21:13:15.525 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 19 21:13:15.525 INFO [stderr] 
Dec 19 21:13:16.684 INFO [stderr] warning: function is never used: `foo`
Dec 19 21:13:16.684 INFO [stderr]   --> src/ownership.rs:26:1
Dec 19 21:13:16.684 INFO [stderr]    |
Dec 19 21:13:16.684 INFO [stderr] 26 | fn foo(v: Vec<i32>) -> Vec<i32> {
Dec 19 21:13:16.684 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:13:16.684 INFO [stderr]    |
Dec 19 21:13:16.684 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 21:13:16.684 INFO [stderr] 
Dec 19 21:13:17.100 INFO [stderr] warning: function is never used: `foo`
Dec 19 21:13:17.100 INFO [stderr]   --> src/ownership.rs:26:1
Dec 19 21:13:17.100 INFO [stderr]    |
Dec 19 21:13:17.100 INFO [stderr] 26 | fn foo(v: Vec<i32>) -> Vec<i32> {
Dec 19 21:13:17.100 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 19 21:13:17.116 INFO [stderr]    |
Dec 19 21:13:17.116 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 19 21:13:17.116 INFO [stderr] 
Dec 19 21:13:17.204 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 2.85s
Dec 19 21:13:17.846 INFO running `"docker" "inspect" "7b78cafc3c10e479472d7f27de29f27b1437ac444d6f65405cefac9ca378c58c"`
Dec 19 21:13:18.169 INFO running `"docker" "rm" "-f" "7b78cafc3c10e479472d7f27de29f27b1437ac444d6f65405cefac9ca378c58c"`
Dec 19 21:13:18.468 INFO [stdout] 7b78cafc3c10e479472d7f27de29f27b1437ac444d6f65405cefac9ca378c58c