Dec 11 23:27:58.636 INFO checking YoshikuniJujo/learn_rust against master#3a75e80557a103497cffbcab395a2f37061a77ea for pr-56677
Dec 11 23:27:58.636 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56677/worker-6/master#3a75e80557a103497cffbcab395a2f37061a77ea:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56677/master#3a75e80557a103497cffbcab395a2f37061a77ea:/source:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/source" "-e" "USER_ID=1000" "-e" "CMD=cargo +3a75e80557a103497cffbcab395a2f37061a77ea-alt check --frozen --all --all-targets" "-e" "CARGO_TARGET_DIR=/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/cargo-home" "-e" "RUSTUP_HOME=/rustup-home" "-m" "1536M" "--network" "none" "crater"`
Dec 11 23:27:58.896 INFO [stdout] 2971eff00785a550dfe495431d6d32087d54463a54fe15f27a40dbc352db237f
Dec 11 23:27:58.902 INFO running `"docker" "start" "-a" "2971eff00785a550dfe495431d6d32087d54463a54fe15f27a40dbc352db237f"`
Dec 11 23:27:59.440 INFO [stderr] usermod: no changes
Dec 11 23:27:59.528 INFO [stderr]     Checking learn_rust v0.1.0 (/source)
Dec 11 23:28:01.232 INFO [stderr] warning: value assigned to `x` is never read
Dec 11 23:28:01.232 INFO [stderr]  --> src/mutability.rs:9:10
Dec 11 23:28:01.232 INFO [stderr]   |
Dec 11 23:28:01.232 INFO [stderr] 9 |     let mut x = 5;
Dec 11 23:28:01.232 INFO [stderr]   |             ^
Dec 11 23:28:01.232 INFO [stderr]   |
Dec 11 23:28:01.233 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 11 23:28:01.233 INFO [stderr] 
Dec 11 23:28:01.233 INFO [stderr] warning: variable `y` is assigned to, but never used
Dec 11 23:28:01.233 INFO [stderr]   --> src/mutability.rs:13:10
Dec 11 23:28:01.233 INFO [stderr]    |
Dec 11 23:28:01.233 INFO [stderr] 13 |     let mut y = &mut x;
Dec 11 23:28:01.233 INFO [stderr]    |             ^
Dec 11 23:28:01.233 INFO [stderr]    |
Dec 11 23:28:01.234 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 23:28:01.234 INFO [stderr]    = note: consider using `_y` instead
Dec 11 23:28:01.234 INFO [stderr] 
Dec 11 23:28:01.234 INFO [stderr] warning: value assigned to `y` is never read
Dec 11 23:28:01.234 INFO [stderr]   --> src/mutability.rs:14:2
Dec 11 23:28:01.234 INFO [stderr]    |
Dec 11 23:28:01.234 INFO [stderr] 14 |     y = &mut z;
Dec 11 23:28:01.235 INFO [stderr]    |     ^
Dec 11 23:28:01.235 INFO [stderr] 
Dec 11 23:28:01.260 INFO [stderr] warning: field is never used: `x`
Dec 11 23:28:01.260 INFO [stderr]  --> src/mutability.rs:4:2
Dec 11 23:28:01.261 INFO [stderr]   |
Dec 11 23:28:01.261 INFO [stderr] 4 |     x: i32,
Dec 11 23:28:01.261 INFO [stderr]   |     ^^^^^^
Dec 11 23:28:01.261 INFO [stderr]   |
Dec 11 23:28:01.261 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 23:28:01.261 INFO [stderr] 
Dec 11 23:28:02.640 INFO [stderr] warning: function is never used: `foo`
Dec 11 23:28:02.640 INFO [stderr]   --> src/ownership.rs:26:1
Dec 11 23:28:02.640 INFO [stderr]    |
Dec 11 23:28:02.640 INFO [stderr] 26 | fn foo(v: Vec<i32>) -> Vec<i32> {
Dec 11 23:28:02.640 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 23:28:02.640 INFO [stderr]    |
Dec 11 23:28:02.640 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 23:28:02.640 INFO [stderr] 
Dec 11 23:28:02.680 INFO [stderr] warning: function is never used: `foo`
Dec 11 23:28:02.680 INFO [stderr]   --> src/ownership.rs:26:1
Dec 11 23:28:02.680 INFO [stderr]    |
Dec 11 23:28:02.680 INFO [stderr] 26 | fn foo(v: Vec<i32>) -> Vec<i32> {
Dec 11 23:28:02.680 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 11 23:28:02.680 INFO [stderr]    |
Dec 11 23:28:02.680 INFO [stderr]    = note: #[warn(dead_code)] on by default
Dec 11 23:28:02.680 INFO [stderr] 
Dec 11 23:28:05.873 INFO [stderr] warning: value assigned to `x` is never read
Dec 11 23:28:05.873 INFO [stderr]  --> src/mutability.rs:9:10
Dec 11 23:28:05.873 INFO [stderr]   |
Dec 11 23:28:05.874 INFO [stderr] 9 |     let mut x = 5;
Dec 11 23:28:05.874 INFO [stderr]   |             ^
Dec 11 23:28:05.874 INFO [stderr]   |
Dec 11 23:28:05.875 INFO [stderr]   = note: #[warn(unused_assignments)] on by default
Dec 11 23:28:05.875 INFO [stderr] 
Dec 11 23:28:05.875 INFO [stderr] warning: variable `y` is assigned to, but never used
Dec 11 23:28:05.875 INFO [stderr]   --> src/mutability.rs:13:10
Dec 11 23:28:05.876 INFO [stderr]    |
Dec 11 23:28:05.876 INFO [stderr] 13 |     let mut y = &mut x;
Dec 11 23:28:05.876 INFO [stderr]    |             ^
Dec 11 23:28:05.876 INFO [stderr]    |
Dec 11 23:28:05.877 INFO [stderr]    = note: #[warn(unused_variables)] on by default
Dec 11 23:28:05.877 INFO [stderr]    = note: consider using `_y` instead
Dec 11 23:28:05.877 INFO [stderr] 
Dec 11 23:28:05.877 INFO [stderr] warning: value assigned to `y` is never read
Dec 11 23:28:05.877 INFO [stderr]   --> src/mutability.rs:14:2
Dec 11 23:28:05.878 INFO [stderr]    |
Dec 11 23:28:05.878 INFO [stderr] 14 |     y = &mut z;
Dec 11 23:28:05.878 INFO [stderr]    |     ^
Dec 11 23:28:05.878 INFO [stderr] 
Dec 11 23:28:05.892 INFO [stderr] warning: field is never used: `x`
Dec 11 23:28:05.893 INFO [stderr]  --> src/mutability.rs:4:2
Dec 11 23:28:05.893 INFO [stderr]   |
Dec 11 23:28:05.893 INFO [stderr] 4 |     x: i32,
Dec 11 23:28:05.893 INFO [stderr]   |     ^^^^^^
Dec 11 23:28:05.894 INFO [stderr]   |
Dec 11 23:28:05.894 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 11 23:28:05.894 INFO [stderr] 
Dec 11 23:28:06.293 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.81s
Dec 11 23:28:06.297 INFO [stderr] su: No module specific data is present
Dec 11 23:28:06.950 INFO running `"docker" "inspect" "2971eff00785a550dfe495431d6d32087d54463a54fe15f27a40dbc352db237f"`
Dec 11 23:28:07.356 INFO running `"docker" "rm" "-f" "2971eff00785a550dfe495431d6d32087d54463a54fe15f27a40dbc352db237f"`
Dec 11 23:28:07.583 INFO [stdout] 2971eff00785a550dfe495431d6d32087d54463a54fe15f27a40dbc352db237f