Dec 17 23:25:46.843 INFO checking hardvain/rust-practice against try#0b8c5828f68d7b2840b81fa51239346dc97fef5a for pr-54252
Dec 17 23:25:46.843 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-54252/worker-4/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/pr-54252/sources/try#0b8c5828f68d7b2840b81fa51239346dc97fef5a/gh/hardvain/rust-practice:/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" "+0b8c5828f68d7b2840b81fa51239346dc97fef5a-alt" "check" "--frozen" "--all" "--all-targets"`
Dec 17 23:25:47.098 INFO [stdout] 599ed486fabf50081d924350d14c44d1856e8607b2b01dbea75ac3f3514f9ad8
Dec 17 23:25:47.098 INFO running `"docker" "start" "-a" "599ed486fabf50081d924350d14c44d1856e8607b2b01dbea75ac3f3514f9ad8"`
Dec 17 23:25:48.320 INFO [stderr]     Checking practice v0.1.0 (/opt/crater/workdir)
Dec 17 23:25:48.580 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.580 INFO [stderr]  --> src/main.rs:9:24
Dec 17 23:25:48.580 INFO [stderr]   |
Dec 17 23:25:48.580 INFO [stderr] 9 | fn taking_owned_sample(sample: Sample) {}
Dec 17 23:25:48.580 INFO [stderr]   |                        ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.580 INFO [stderr]   |
Dec 17 23:25:48.580 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 17 23:25:48.580 INFO [stderr] 
Dec 17 23:25:48.580 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.580 INFO [stderr]   --> src/main.rs:10:25
Dec 17 23:25:48.580 INFO [stderr]    |
Dec 17 23:25:48.580 INFO [stderr] 10 | fn taking_shared_sample(sample: &Sample) {}
Dec 17 23:25:48.580 INFO [stderr]    |                         ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.580 INFO [stderr] 
Dec 17 23:25:48.580 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.580 INFO [stderr]   --> src/main.rs:11:26
Dec 17 23:25:48.580 INFO [stderr]    |
Dec 17 23:25:48.580 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 17 23:25:48.580 INFO [stderr]    |                          ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.580 INFO [stderr] 
Dec 17 23:25:48.580 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.580 INFO [stderr]   --> src/main.rs:37:9
Dec 17 23:25:48.580 INFO [stderr]    |
Dec 17 23:25:48.580 INFO [stderr] 37 |     let sample = Sample { key: 1 };
Dec 17 23:25:48.580 INFO [stderr]    |         ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.580 INFO [stderr] 
Dec 17 23:25:48.580 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.580 INFO [stderr]   --> src/main.rs:44:9
Dec 17 23:25:48.580 INFO [stderr]    |
Dec 17 23:25:48.580 INFO [stderr] 44 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.580 INFO [stderr]    |         ----^^^^^^
Dec 17 23:25:48.580 INFO [stderr]    |         |
Dec 17 23:25:48.580 INFO [stderr]    |         help: remove this `mut`
Dec 17 23:25:48.580 INFO [stderr]    |
Dec 17 23:25:48.580 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 23:25:48.580 INFO [stderr] 
Dec 17 23:25:48.580 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.580 INFO [stderr]   --> src/main.rs:60:9
Dec 17 23:25:48.580 INFO [stderr]    |
Dec 17 23:25:48.581 INFO [stderr] 60 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.581 INFO [stderr]    |         ----^^^^^^
Dec 17 23:25:48.581 INFO [stderr]    |         |
Dec 17 23:25:48.581 INFO [stderr]    |         help: remove this `mut`
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.581 INFO [stderr]    --> src/main.rs:113:9
Dec 17 23:25:48.581 INFO [stderr]     |
Dec 17 23:25:48.581 INFO [stderr] 113 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.581 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.581 INFO [stderr]     |         |
Dec 17 23:25:48.581 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.581 INFO [stderr]    --> src/main.rs:121:9
Dec 17 23:25:48.581 INFO [stderr]     |
Dec 17 23:25:48.581 INFO [stderr] 121 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.581 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.581 INFO [stderr]     |         |
Dec 17 23:25:48.581 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.581 INFO [stderr]    --> src/main.rs:130:9
Dec 17 23:25:48.581 INFO [stderr]     |
Dec 17 23:25:48.581 INFO [stderr] 130 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.581 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.581 INFO [stderr]     |         |
Dec 17 23:25:48.581 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.581 INFO [stderr]    --> src/main.rs:137:9
Dec 17 23:25:48.581 INFO [stderr]     |
Dec 17 23:25:48.581 INFO [stderr] 137 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.581 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.581 INFO [stderr]     |         |
Dec 17 23:25:48.581 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: field is never used: `key`
Dec 17 23:25:48.581 INFO [stderr]  --> src/main.rs:2:3
Dec 17 23:25:48.581 INFO [stderr]   |
Dec 17 23:25:48.581 INFO [stderr] 2 |   key: i32,
Dec 17 23:25:48.581 INFO [stderr]   |   ^^^^^^^^
Dec 17 23:25:48.581 INFO [stderr]   |
Dec 17 23:25:48.581 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: function is never used: `taking_mutable_sample`
Dec 17 23:25:48.581 INFO [stderr]   --> src/main.rs:11:1
Dec 17 23:25:48.581 INFO [stderr]    |
Dec 17 23:25:48.581 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 17 23:25:48.581 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.581 INFO [stderr] warning: function is never used: `mutable_binding_function_calls`
Dec 17 23:25:48.581 INFO [stderr]   --> src/main.rs:42:1
Dec 17 23:25:48.581 INFO [stderr]    |
Dec 17 23:25:48.581 INFO [stderr] 42 | fn mutable_binding_function_calls() {
Dec 17 23:25:48.581 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:25:48.581 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.601 INFO [stderr]  --> src/main.rs:9:24
Dec 17 23:25:48.601 INFO [stderr]   |
Dec 17 23:25:48.601 INFO [stderr] 9 | fn taking_owned_sample(sample: Sample) {}
Dec 17 23:25:48.601 INFO [stderr]   |                        ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.601 INFO [stderr]   |
Dec 17 23:25:48.601 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.601 INFO [stderr]   --> src/main.rs:10:25
Dec 17 23:25:48.601 INFO [stderr]    |
Dec 17 23:25:48.601 INFO [stderr] 10 | fn taking_shared_sample(sample: &Sample) {}
Dec 17 23:25:48.601 INFO [stderr]    |                         ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.601 INFO [stderr]   --> src/main.rs:11:26
Dec 17 23:25:48.601 INFO [stderr]    |
Dec 17 23:25:48.601 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 17 23:25:48.601 INFO [stderr]    |                          ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: unused variable: `sample`
Dec 17 23:25:48.601 INFO [stderr]   --> src/main.rs:37:9
Dec 17 23:25:48.601 INFO [stderr]    |
Dec 17 23:25:48.601 INFO [stderr] 37 |     let sample = Sample { key: 1 };
Dec 17 23:25:48.601 INFO [stderr]    |         ^^^^^^ help: consider using `_sample` instead
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.601 INFO [stderr]   --> src/main.rs:44:9
Dec 17 23:25:48.601 INFO [stderr]    |
Dec 17 23:25:48.601 INFO [stderr] 44 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.601 INFO [stderr]    |         ----^^^^^^
Dec 17 23:25:48.601 INFO [stderr]    |         |
Dec 17 23:25:48.601 INFO [stderr]    |         help: remove this `mut`
Dec 17 23:25:48.601 INFO [stderr]    |
Dec 17 23:25:48.601 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.601 INFO [stderr]   --> src/main.rs:60:9
Dec 17 23:25:48.601 INFO [stderr]    |
Dec 17 23:25:48.601 INFO [stderr] 60 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.601 INFO [stderr]    |         ----^^^^^^
Dec 17 23:25:48.601 INFO [stderr]    |         |
Dec 17 23:25:48.601 INFO [stderr]    |         help: remove this `mut`
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.601 INFO [stderr]    --> src/main.rs:113:9
Dec 17 23:25:48.601 INFO [stderr]     |
Dec 17 23:25:48.601 INFO [stderr] 113 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.601 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.601 INFO [stderr]     |         |
Dec 17 23:25:48.601 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.601 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.601 INFO [stderr]    --> src/main.rs:121:9
Dec 17 23:25:48.601 INFO [stderr]     |
Dec 17 23:25:48.601 INFO [stderr] 121 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.601 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.601 INFO [stderr]     |         |
Dec 17 23:25:48.601 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.601 INFO [stderr] 
Dec 17 23:25:48.602 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.602 INFO [stderr]    --> src/main.rs:130:9
Dec 17 23:25:48.602 INFO [stderr]     |
Dec 17 23:25:48.602 INFO [stderr] 130 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.602 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.602 INFO [stderr]     |         |
Dec 17 23:25:48.602 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.602 INFO [stderr] 
Dec 17 23:25:48.602 INFO [stderr] warning: variable does not need to be mutable
Dec 17 23:25:48.602 INFO [stderr]    --> src/main.rs:137:9
Dec 17 23:25:48.602 INFO [stderr]     |
Dec 17 23:25:48.602 INFO [stderr] 137 |     let mut sample = Sample { key: 1 };
Dec 17 23:25:48.602 INFO [stderr]     |         ----^^^^^^
Dec 17 23:25:48.602 INFO [stderr]     |         |
Dec 17 23:25:48.602 INFO [stderr]     |         help: remove this `mut`
Dec 17 23:25:48.602 INFO [stderr] 
Dec 17 23:25:48.602 INFO [stderr] warning: field is never used: `key`
Dec 17 23:25:48.602 INFO [stderr]  --> src/main.rs:2:3
Dec 17 23:25:48.602 INFO [stderr]   |
Dec 17 23:25:48.602 INFO [stderr] 2 |   key: i32,
Dec 17 23:25:48.602 INFO [stderr]   |   ^^^^^^^^
Dec 17 23:25:48.602 INFO [stderr]   |
Dec 17 23:25:48.602 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 17 23:25:48.602 INFO [stderr] 
Dec 17 23:25:48.602 INFO [stderr] warning: function is never used: `taking_mutable_sample`
Dec 17 23:25:48.602 INFO [stderr]   --> src/main.rs:11:1
Dec 17 23:25:48.602 INFO [stderr]    |
Dec 17 23:25:48.602 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 17 23:25:48.602 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:25:48.602 INFO [stderr] 
Dec 17 23:25:48.602 INFO [stderr] warning: function is never used: `mutable_binding_function_calls`
Dec 17 23:25:48.602 INFO [stderr]   --> src/main.rs:42:1
Dec 17 23:25:48.602 INFO [stderr]    |
Dec 17 23:25:48.602 INFO [stderr] 42 | fn mutable_binding_function_calls() {
Dec 17 23:25:48.602 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 17 23:25:48.602 INFO [stderr] 
Dec 17 23:25:48.630 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.33s
Dec 17 23:25:49.133 INFO running `"docker" "inspect" "599ed486fabf50081d924350d14c44d1856e8607b2b01dbea75ac3f3514f9ad8"`
Dec 17 23:25:49.438 INFO running `"docker" "rm" "-f" "599ed486fabf50081d924350d14c44d1856e8607b2b01dbea75ac3f3514f9ad8"`
Dec 17 23:25:49.564 INFO [stdout] 599ed486fabf50081d924350d14c44d1856e8607b2b01dbea75ac3f3514f9ad8