Dec 13 17:47:42.694 INFO testing hardvain/rust-practice against try#aa49d8ef14939ddec0e34b346b60174a5673d48f for pr-56550
Dec 13 17:47:42.694 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt build --frozen" "-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 13 17:47:42.947 INFO [stdout] 7ea66e91ab23cc0c5488716862cf893fee691636cfeccb370fe05be052e78e36
Dec 13 17:47:42.953 INFO running `"docker" "start" "-a" "7ea66e91ab23cc0c5488716862cf893fee691636cfeccb370fe05be052e78e36"`
Dec 13 17:47:43.679 INFO [stderr] usermod: no changes
Dec 13 17:47:43.735 INFO [stderr]    Compiling practice v0.1.0 (/source)
Dec 13 17:47:44.013 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:44.013 INFO [stderr]  --> src/main.rs:9:24
Dec 13 17:47:44.013 INFO [stderr]   |
Dec 13 17:47:44.013 INFO [stderr] 9 | fn taking_owned_sample(sample: Sample) {}
Dec 13 17:47:44.013 INFO [stderr]   |                        ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:44.013 INFO [stderr]   |
Dec 13 17:47:44.013 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 13 17:47:44.013 INFO [stderr] 
Dec 13 17:47:44.013 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:44.013 INFO [stderr]   --> src/main.rs:10:25
Dec 13 17:47:44.013 INFO [stderr]    |
Dec 13 17:47:44.013 INFO [stderr] 10 | fn taking_shared_sample(sample: &Sample) {}
Dec 13 17:47:44.013 INFO [stderr]    |                         ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:44.013 INFO [stderr] 
Dec 13 17:47:44.013 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:44.013 INFO [stderr]   --> src/main.rs:11:26
Dec 13 17:47:44.013 INFO [stderr]    |
Dec 13 17:47:44.013 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 13 17:47:44.013 INFO [stderr]    |                          ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:44.013 INFO [stderr] 
Dec 13 17:47:44.013 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:44.013 INFO [stderr]   --> src/main.rs:37:9
Dec 13 17:47:44.013 INFO [stderr]    |
Dec 13 17:47:44.013 INFO [stderr] 37 |     let sample = Sample { key: 1 };
Dec 13 17:47:44.013 INFO [stderr]    |         ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:44.013 INFO [stderr] 
Dec 13 17:47:44.015 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:44.015 INFO [stderr]   --> src/main.rs:44:9
Dec 13 17:47:44.015 INFO [stderr]    |
Dec 13 17:47:44.015 INFO [stderr] 44 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:44.015 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:44.015 INFO [stderr]    |         |
Dec 13 17:47:44.015 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:44.015 INFO [stderr]    |
Dec 13 17:47:44.015 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 17:47:44.015 INFO [stderr] 
Dec 13 17:47:44.015 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:44.015 INFO [stderr]   --> src/main.rs:60:9
Dec 13 17:47:44.015 INFO [stderr]    |
Dec 13 17:47:44.015 INFO [stderr] 60 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:44.015 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:44.015 INFO [stderr]    |         |
Dec 13 17:47:44.015 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:44.015 INFO [stderr] 
Dec 13 17:47:44.018 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:44.019 INFO [stderr]    --> src/main.rs:113:9
Dec 13 17:47:44.019 INFO [stderr]     |
Dec 13 17:47:44.019 INFO [stderr] 113 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:44.019 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:44.019 INFO [stderr]     |         |
Dec 13 17:47:44.019 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.019 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:44.019 INFO [stderr]    --> src/main.rs:121:9
Dec 13 17:47:44.019 INFO [stderr]     |
Dec 13 17:47:44.019 INFO [stderr] 121 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:44.019 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:44.019 INFO [stderr]     |         |
Dec 13 17:47:44.019 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.019 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:44.019 INFO [stderr]    --> src/main.rs:130:9
Dec 13 17:47:44.019 INFO [stderr]     |
Dec 13 17:47:44.019 INFO [stderr] 130 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:44.019 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:44.019 INFO [stderr]     |         |
Dec 13 17:47:44.019 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.019 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:44.019 INFO [stderr]    --> src/main.rs:137:9
Dec 13 17:47:44.019 INFO [stderr]     |
Dec 13 17:47:44.019 INFO [stderr] 137 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:44.019 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:44.019 INFO [stderr]     |         |
Dec 13 17:47:44.019 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.019 INFO [stderr] warning: field is never used: `key`
Dec 13 17:47:44.019 INFO [stderr]  --> src/main.rs:2:3
Dec 13 17:47:44.019 INFO [stderr]   |
Dec 13 17:47:44.019 INFO [stderr] 2 |   key: i32,
Dec 13 17:47:44.019 INFO [stderr]   |   ^^^^^^^^
Dec 13 17:47:44.019 INFO [stderr]   |
Dec 13 17:47:44.019 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.019 INFO [stderr] warning: function is never used: `taking_mutable_sample`
Dec 13 17:47:44.019 INFO [stderr]   --> src/main.rs:11:1
Dec 13 17:47:44.019 INFO [stderr]    |
Dec 13 17:47:44.019 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 13 17:47:44.019 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.019 INFO [stderr] warning: function is never used: `mutable_binding_function_calls`
Dec 13 17:47:44.019 INFO [stderr]   --> src/main.rs:42:1
Dec 13 17:47:44.019 INFO [stderr]    |
Dec 13 17:47:44.019 INFO [stderr] 42 | fn mutable_binding_function_calls() {
Dec 13 17:47:44.019 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:47:44.019 INFO [stderr] 
Dec 13 17:47:44.179 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 13 17:47:44.180 INFO [stderr] su: No module specific data is present
Dec 13 17:47:44.420 INFO running `"docker" "inspect" "7ea66e91ab23cc0c5488716862cf893fee691636cfeccb370fe05be052e78e36"`
Dec 13 17:47:44.511 INFO running `"docker" "rm" "-f" "7ea66e91ab23cc0c5488716862cf893fee691636cfeccb370fe05be052e78e36"`
Dec 13 17:47:44.616 INFO [stdout] 7ea66e91ab23cc0c5488716862cf893fee691636cfeccb370fe05be052e78e36
Dec 13 17:47:44.623 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen --no-run" "-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 13 17:47:44.842 INFO [stdout] cf22d0b08170fa6c0655e47a34dc9abd14d5a2ce7769effdc649d102ab1b245d
Dec 13 17:47:44.845 INFO running `"docker" "start" "-a" "cf22d0b08170fa6c0655e47a34dc9abd14d5a2ce7769effdc649d102ab1b245d"`
Dec 13 17:47:45.308 INFO [stderr] usermod: no changes
Dec 13 17:47:45.343 INFO [stderr]    Compiling practice v0.1.0 (/source)
Dec 13 17:47:45.634 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:45.634 INFO [stderr]  --> src/main.rs:9:24
Dec 13 17:47:45.634 INFO [stderr]   |
Dec 13 17:47:45.634 INFO [stderr] 9 | fn taking_owned_sample(sample: Sample) {}
Dec 13 17:47:45.634 INFO [stderr]   |                        ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:45.634 INFO [stderr]   |
Dec 13 17:47:45.634 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 13 17:47:45.634 INFO [stderr] 
Dec 13 17:47:45.634 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:10:25
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 10 | fn taking_shared_sample(sample: &Sample) {}
Dec 13 17:47:45.635 INFO [stderr]    |                         ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:11:26
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 13 17:47:45.635 INFO [stderr]    |                          ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:37:9
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 37 |     let sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]    |         ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:44:9
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 44 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:45.635 INFO [stderr]    |         |
Dec 13 17:47:45.635 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:60:9
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 60 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:45.635 INFO [stderr]    |         |
Dec 13 17:47:45.635 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.635 INFO [stderr]    --> src/main.rs:113:9
Dec 13 17:47:45.635 INFO [stderr]     |
Dec 13 17:47:45.635 INFO [stderr] 113 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.635 INFO [stderr]     |         |
Dec 13 17:47:45.635 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.635 INFO [stderr]    --> src/main.rs:121:9
Dec 13 17:47:45.635 INFO [stderr]     |
Dec 13 17:47:45.635 INFO [stderr] 121 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.635 INFO [stderr]     |         |
Dec 13 17:47:45.635 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.635 INFO [stderr]    --> src/main.rs:130:9
Dec 13 17:47:45.635 INFO [stderr]     |
Dec 13 17:47:45.635 INFO [stderr] 130 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.635 INFO [stderr]     |         |
Dec 13 17:47:45.635 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.635 INFO [stderr]    --> src/main.rs:137:9
Dec 13 17:47:45.635 INFO [stderr]     |
Dec 13 17:47:45.635 INFO [stderr] 137 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.635 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.635 INFO [stderr]     |         |
Dec 13 17:47:45.635 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: field is never used: `key`
Dec 13 17:47:45.635 INFO [stderr]  --> src/main.rs:2:3
Dec 13 17:47:45.635 INFO [stderr]   |
Dec 13 17:47:45.635 INFO [stderr] 2 |   key: i32,
Dec 13 17:47:45.635 INFO [stderr]   |   ^^^^^^^^
Dec 13 17:47:45.635 INFO [stderr]   |
Dec 13 17:47:45.635 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: function is never used: `taking_mutable_sample`
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:11:1
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 13 17:47:45.635 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.635 INFO [stderr] warning: function is never used: `mutable_binding_function_calls`
Dec 13 17:47:45.635 INFO [stderr]   --> src/main.rs:42:1
Dec 13 17:47:45.635 INFO [stderr]    |
Dec 13 17:47:45.635 INFO [stderr] 42 | fn mutable_binding_function_calls() {
Dec 13 17:47:45.635 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:47:45.635 INFO [stderr] 
Dec 13 17:47:45.900 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.54s
Dec 13 17:47:45.900 INFO [stderr] su: No module specific data is present
Dec 13 17:47:46.210 INFO running `"docker" "inspect" "cf22d0b08170fa6c0655e47a34dc9abd14d5a2ce7769effdc649d102ab1b245d"`
Dec 13 17:47:46.307 INFO running `"docker" "rm" "-f" "cf22d0b08170fa6c0655e47a34dc9abd14d5a2ce7769effdc649d102ab1b245d"`
Dec 13 17:47:46.391 INFO [stdout] cf22d0b08170fa6c0655e47a34dc9abd14d5a2ce7769effdc649d102ab1b245d
Dec 13 17:47:46.394 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-0/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-0/pr-56550/try#aa49d8ef14939ddec0e34b346b60174a5673d48f:/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 +aa49d8ef14939ddec0e34b346b60174a5673d48f-alt test --frozen" "-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 13 17:47:46.589 INFO [stdout] d69e6a2c8ebb4c35c20eec5c88d81894e993f79a35e98f88b141881ee3c3c43f
Dec 13 17:47:46.590 INFO running `"docker" "start" "-a" "d69e6a2c8ebb4c35c20eec5c88d81894e993f79a35e98f88b141881ee3c3c43f"`
Dec 13 17:47:47.083 INFO [stderr] usermod: no changes
Dec 13 17:47:47.116 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.02s
Dec 13 17:47:47.119 INFO [stderr]      Running /target/debug/deps/practice-54dd17ddd62da59d
Dec 13 17:47:47.130 INFO [stdout] 
Dec 13 17:47:47.130 INFO [stdout] running 0 tests
Dec 13 17:47:47.130 INFO [stdout] 
Dec 13 17:47:47.130 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 17:47:47.130 INFO [stdout] 
Dec 13 17:47:47.130 INFO [stderr] su: No module specific data is present
Dec 13 17:47:47.542 INFO running `"docker" "inspect" "d69e6a2c8ebb4c35c20eec5c88d81894e993f79a35e98f88b141881ee3c3c43f"`
Dec 13 17:47:47.764 INFO running `"docker" "rm" "-f" "d69e6a2c8ebb4c35c20eec5c88d81894e993f79a35e98f88b141881ee3c3c43f"`
Dec 13 17:47:47.912 INFO [stdout] d69e6a2c8ebb4c35c20eec5c88d81894e993f79a35e98f88b141881ee3c3c43f