Dec 13 17:47:42.808 INFO testing hardvain/rust-practice against master#bd47d6825bf4090517549d33cfef10d3300b4a75 for pr-56550
Dec 13 17:47:42.808 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 17:47:43.023 INFO [stdout] 7a7afe3b69badf2e8317286d04d9d08528c1e8d6a5a9c9fbdb37622c8d0b51b6
Dec 13 17:47:43.025 INFO running `"docker" "start" "-a" "7a7afe3b69badf2e8317286d04d9d08528c1e8d6a5a9c9fbdb37622c8d0b51b6"`
Dec 13 17:47:43.626 INFO [stderr] usermod: no changes
Dec 13 17:47:43.639 INFO [stderr]    Compiling practice v0.1.0 (/source)
Dec 13 17:47:43.935 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:43.935 INFO [stderr]  --> src/main.rs:9:24
Dec 13 17:47:43.935 INFO [stderr]   |
Dec 13 17:47:43.935 INFO [stderr] 9 | fn taking_owned_sample(sample: Sample) {}
Dec 13 17:47:43.935 INFO [stderr]   |                        ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:43.935 INFO [stderr]   |
Dec 13 17:47:43.935 INFO [stderr]   = note: #[warn(unused_variables)] on by default
Dec 13 17:47:43.935 INFO [stderr] 
Dec 13 17:47:43.935 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:43.935 INFO [stderr]   --> src/main.rs:10:25
Dec 13 17:47:43.935 INFO [stderr]    |
Dec 13 17:47:43.935 INFO [stderr] 10 | fn taking_shared_sample(sample: &Sample) {}
Dec 13 17:47:43.935 INFO [stderr]    |                         ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:43.935 INFO [stderr] 
Dec 13 17:47:43.935 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:43.935 INFO [stderr]   --> src/main.rs:11:26
Dec 13 17:47:43.935 INFO [stderr]    |
Dec 13 17:47:43.935 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 13 17:47:43.935 INFO [stderr]    |                          ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:43.935 INFO [stderr] 
Dec 13 17:47:43.935 INFO [stderr] warning: unused variable: `sample`
Dec 13 17:47:43.935 INFO [stderr]   --> src/main.rs:37:9
Dec 13 17:47:43.935 INFO [stderr]    |
Dec 13 17:47:43.935 INFO [stderr] 37 |     let sample = Sample { key: 1 };
Dec 13 17:47:43.935 INFO [stderr]    |         ^^^^^^ help: consider using `_sample` instead
Dec 13 17:47:43.935 INFO [stderr] 
Dec 13 17:47:43.935 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:43.935 INFO [stderr]   --> src/main.rs:44:9
Dec 13 17:47:43.935 INFO [stderr]    |
Dec 13 17:47:43.936 INFO [stderr] 44 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:43.936 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:43.936 INFO [stderr]    |         |
Dec 13 17:47:43.936 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:43.936 INFO [stderr]    |
Dec 13 17:47:43.936 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:43.936 INFO [stderr]   --> src/main.rs:60:9
Dec 13 17:47:43.936 INFO [stderr]    |
Dec 13 17:47:43.936 INFO [stderr] 60 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:43.936 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:43.936 INFO [stderr]    |         |
Dec 13 17:47:43.936 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:43.936 INFO [stderr]    --> src/main.rs:113:9
Dec 13 17:47:43.936 INFO [stderr]     |
Dec 13 17:47:43.936 INFO [stderr] 113 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:43.936 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:43.936 INFO [stderr]     |         |
Dec 13 17:47:43.936 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:43.936 INFO [stderr]    --> src/main.rs:121:9
Dec 13 17:47:43.936 INFO [stderr]     |
Dec 13 17:47:43.936 INFO [stderr] 121 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:43.936 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:43.936 INFO [stderr]     |         |
Dec 13 17:47:43.936 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:43.936 INFO [stderr]    --> src/main.rs:130:9
Dec 13 17:47:43.936 INFO [stderr]     |
Dec 13 17:47:43.936 INFO [stderr] 130 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:43.936 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:43.936 INFO [stderr]     |         |
Dec 13 17:47:43.936 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:43.936 INFO [stderr]    --> src/main.rs:137:9
Dec 13 17:47:43.936 INFO [stderr]     |
Dec 13 17:47:43.936 INFO [stderr] 137 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:43.936 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:43.936 INFO [stderr]     |         |
Dec 13 17:47:43.936 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: field is never used: `key`
Dec 13 17:47:43.936 INFO [stderr]  --> src/main.rs:2:3
Dec 13 17:47:43.936 INFO [stderr]   |
Dec 13 17:47:43.936 INFO [stderr] 2 |   key: i32,
Dec 13 17:47:43.936 INFO [stderr]   |   ^^^^^^^^
Dec 13 17:47:43.936 INFO [stderr]   |
Dec 13 17:47:43.936 INFO [stderr]   = note: #[warn(dead_code)] on by default
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: function is never used: `taking_mutable_sample`
Dec 13 17:47:43.936 INFO [stderr]   --> src/main.rs:11:1
Dec 13 17:47:43.936 INFO [stderr]    |
Dec 13 17:47:43.936 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {}
Dec 13 17:47:43.936 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:43.936 INFO [stderr] warning: function is never used: `mutable_binding_function_calls`
Dec 13 17:47:43.936 INFO [stderr]   --> src/main.rs:42:1
Dec 13 17:47:43.936 INFO [stderr]    |
Dec 13 17:47:43.936 INFO [stderr] 42 | fn mutable_binding_function_calls() {
Dec 13 17:47:43.936 INFO [stderr]    | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Dec 13 17:47:43.936 INFO [stderr] 
Dec 13 17:47:44.105 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.48s
Dec 13 17:47:44.107 INFO [stderr] su: No module specific data is present
Dec 13 17:47:44.362 INFO running `"docker" "inspect" "7a7afe3b69badf2e8317286d04d9d08528c1e8d6a5a9c9fbdb37622c8d0b51b6"`
Dec 13 17:47:44.464 INFO running `"docker" "rm" "-f" "7a7afe3b69badf2e8317286d04d9d08528c1e8d6a5a9c9fbdb37622c8d0b51b6"`
Dec 13 17:47:44.574 INFO [stdout] 7a7afe3b69badf2e8317286d04d9d08528c1e8d6a5a9c9fbdb37622c8d0b51b6
Dec 13 17:47:44.576 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 17:47:44.807 INFO [stdout] 9e392e3e1e54021c39a639f3c8e47121ae2cde095a330df2b3104a5d83dafb37
Dec 13 17:47:44.809 INFO running `"docker" "start" "-a" "9e392e3e1e54021c39a639f3c8e47121ae2cde095a330df2b3104a5d83dafb37"`
Dec 13 17:47:45.226 INFO [stderr] usermod: no changes
Dec 13 17:47:45.249 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 17:47:45.634 INFO [stderr]   --> src/main.rs:10:25
Dec 13 17:47:45.634 INFO [stderr]    |
Dec 13 17:47:45.634 INFO [stderr] 10 | fn taking_shared_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] warning: unused variable: `sample`
Dec 13 17:47:45.634 INFO [stderr]   --> src/main.rs:11:26
Dec 13 17:47:45.634 INFO [stderr]    |
Dec 13 17:47:45.634 INFO [stderr] 11 | fn taking_mutable_sample(sample: &mut 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] warning: unused variable: `sample`
Dec 13 17:47:45.634 INFO [stderr]   --> src/main.rs:37:9
Dec 13 17:47:45.634 INFO [stderr]    |
Dec 13 17:47:45.634 INFO [stderr] 37 |     let sample = Sample { key: 1 };
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] warning: variable does not need to be mutable
Dec 13 17:47:45.634 INFO [stderr]   --> src/main.rs:44:9
Dec 13 17:47:45.634 INFO [stderr]    |
Dec 13 17:47:45.634 INFO [stderr] 44 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.634 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:45.634 INFO [stderr]    |         |
Dec 13 17:47:45.634 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:45.634 INFO [stderr]    |
Dec 13 17:47:45.634 INFO [stderr]    = note: #[warn(unused_mut)] on by default
Dec 13 17:47:45.634 INFO [stderr] 
Dec 13 17:47:45.634 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.634 INFO [stderr]   --> src/main.rs:60:9
Dec 13 17:47:45.634 INFO [stderr]    |
Dec 13 17:47:45.634 INFO [stderr] 60 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.634 INFO [stderr]    |         ----^^^^^^
Dec 13 17:47:45.634 INFO [stderr]    |         |
Dec 13 17:47:45.634 INFO [stderr]    |         help: remove this `mut`
Dec 13 17:47:45.634 INFO [stderr] 
Dec 13 17:47:45.634 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.634 INFO [stderr]    --> src/main.rs:113:9
Dec 13 17:47:45.634 INFO [stderr]     |
Dec 13 17:47:45.634 INFO [stderr] 113 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.634 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.634 INFO [stderr]     |         |
Dec 13 17:47:45.634 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:45.634 INFO [stderr] 
Dec 13 17:47:45.634 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.634 INFO [stderr]    --> src/main.rs:121:9
Dec 13 17:47:45.634 INFO [stderr]     |
Dec 13 17:47:45.634 INFO [stderr] 121 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.634 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.634 INFO [stderr]     |         |
Dec 13 17:47:45.634 INFO [stderr]     |         help: remove this `mut`
Dec 13 17:47:45.634 INFO [stderr] 
Dec 13 17:47:45.634 INFO [stderr] warning: variable does not need to be mutable
Dec 13 17:47:45.634 INFO [stderr]    --> src/main.rs:130:9
Dec 13 17:47:45.634 INFO [stderr]     |
Dec 13 17:47:45.634 INFO [stderr] 130 |     let mut sample = Sample { key: 1 };
Dec 13 17:47:45.634 INFO [stderr]     |         ----^^^^^^
Dec 13 17:47:45.634 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 17:47:45.838 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.60s
Dec 13 17:47:45.840 INFO [stderr] su: No module specific data is present
Dec 13 17:47:46.232 INFO running `"docker" "inspect" "9e392e3e1e54021c39a639f3c8e47121ae2cde095a330df2b3104a5d83dafb37"`
Dec 13 17:47:46.376 INFO running `"docker" "rm" "-f" "9e392e3e1e54021c39a639f3c8e47121ae2cde095a330df2b3104a5d83dafb37"`
Dec 13 17:47:46.474 INFO [stdout] 9e392e3e1e54021c39a639f3c8e47121ae2cde095a330df2b3104a5d83dafb37
Dec 13 17:47:46.476 INFO running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/pr-56550/worker-6/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/target:rw,Z" "-v" "/mnt/big/crater/work/local/test-source/worker-6/pr-56550/master#bd47d6825bf4090517549d33cfef10d3300b4a75:/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 +bd47d6825bf4090517549d33cfef10d3300b4a75-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 17:47:46.677 INFO [stdout] be16a3843fa458a8851c3dbd1ae420d4c68d915d7c500a8920388021f0f0051d
Dec 13 17:47:46.681 INFO running `"docker" "start" "-a" "be16a3843fa458a8851c3dbd1ae420d4c68d915d7c500a8920388021f0f0051d"`
Dec 13 17:47:47.094 INFO [stderr] usermod: no changes
Dec 13 17:47:47.126 INFO [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.00s
Dec 13 17:47:47.128 INFO [stderr]      Running /target/debug/deps/practice-90a2f04237779462
Dec 13 17:47:47.128 INFO [stdout] 
Dec 13 17:47:47.128 INFO [stdout] running 0 tests
Dec 13 17:47:47.128 INFO [stdout] 
Dec 13 17:47:47.128 INFO [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
Dec 13 17:47:47.128 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" "be16a3843fa458a8851c3dbd1ae420d4c68d915d7c500a8920388021f0f0051d"`
Dec 13 17:47:47.708 INFO running `"docker" "rm" "-f" "be16a3843fa458a8851c3dbd1ae420d4c68d915d7c500a8920388021f0f0051d"`
Dec 13 17:47:47.932 INFO [stdout] be16a3843fa458a8851c3dbd1ae420d4c68d915d7c500a8920388021f0f0051d