[INFO] cloning repository https://github.com/hardvain/rust-practice [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/hardvain/rust-practice" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhardvain%2Frust-practice", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhardvain%2Frust-practice'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] f7ad52d1f6f50a7c945d946f1c36d59100aaf8db [INFO] testing hardvain/rust-practice against 1.49.0 for beta-1.50-1 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fhardvain%2Frust-practice" "/workspace/builds/worker-6/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/hardvain/rust-practice on toolchain 1.49.0 [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/hardvain/rust-practice [INFO] finished tweaking git repo https://github.com/hardvain/rust-practice [INFO] tweaked toml for git repo https://github.com/hardvain/rust-practice written to /workspace/builds/worker-6/source/Cargo.toml [INFO] crate git repo https://github.com/hardvain/rust-practice already has a lockfile, it will not be regenerated [INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.49.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] f12ab3463c14c59b2c31837f0147a1731d49e4f3e422f2c7041f87d0162287a6 [INFO] running `Command { std: "docker" "start" "-a" "f12ab3463c14c59b2c31837f0147a1731d49e4f3e422f2c7041f87d0162287a6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f12ab3463c14c59b2c31837f0147a1731d49e4f3e422f2c7041f87d0162287a6", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f12ab3463c14c59b2c31837f0147a1731d49e4f3e422f2c7041f87d0162287a6", kill_on_drop: false }` [INFO] [stdout] f12ab3463c14c59b2c31837f0147a1731d49e4f3e422f2c7041f87d0162287a6 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] [stdout] 3c15206f604f4175bff5673baae9785ffc08c6045a22305974158bfb51e73ba8 [INFO] running `Command { std: "docker" "start" "-a" "3c15206f604f4175bff5673baae9785ffc08c6045a22305974158bfb51e73ba8", kill_on_drop: false }` [INFO] [stderr] Compiling practice v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:9:24 [INFO] [stdout] | [INFO] [stdout] 9 | fn taking_owned_sample(sample: Sample) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:10:25 [INFO] [stdout] | [INFO] [stdout] 10 | fn taking_shared_sample(sample: &Sample) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:11:26 [INFO] [stdout] | [INFO] [stdout] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let sample = Sample { key: 1 }; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:121:9 [INFO] [stdout] | [INFO] [stdout] 121 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 130 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:137:9 [INFO] [stdout] | [INFO] [stdout] 137 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `key` [INFO] [stdout] --> src/main.rs:2:3 [INFO] [stdout] | [INFO] [stdout] 2 | key: i32, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `taking_mutable_sample` [INFO] [stdout] --> src/main.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `mutable_binding_function_calls` [INFO] [stdout] --> src/main.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn mutable_binding_function_calls() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 13 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished dev [unoptimized + debuginfo] target(s) in 1.07s [INFO] running `Command { std: "docker" "inspect" "3c15206f604f4175bff5673baae9785ffc08c6045a22305974158bfb51e73ba8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3c15206f604f4175bff5673baae9785ffc08c6045a22305974158bfb51e73ba8", kill_on_drop: false }` [INFO] [stdout] 3c15206f604f4175bff5673baae9785ffc08c6045a22305974158bfb51e73ba8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 177f66824aaa6de81f9f3faae74d5bb028ea27ea3813d5de6b8cd0ae1d0d9509 [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "177f66824aaa6de81f9f3faae74d5bb028ea27ea3813d5de6b8cd0ae1d0d9509", kill_on_drop: false }` [INFO] [stderr] Compiling practice v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:9:24 [INFO] [stdout] | [INFO] [stdout] 9 | fn taking_owned_sample(sample: Sample) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:10:25 [INFO] [stdout] | [INFO] [stdout] 10 | fn taking_shared_sample(sample: &Sample) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:11:26 [INFO] [stdout] | [INFO] [stdout] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `sample` [INFO] [stdout] --> src/main.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let sample = Sample { key: 1 }; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:44:9 [INFO] [stdout] | [INFO] [stdout] 44 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:121:9 [INFO] [stdout] | [INFO] [stdout] 121 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:130:9 [INFO] [stdout] | [INFO] [stdout] 130 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:137:9 [INFO] [stdout] | [INFO] [stdout] 137 | let mut sample = Sample { key: 1 }; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field is never read: `key` [INFO] [stdout] --> src/main.rs:2:3 [INFO] [stdout] | [INFO] [stdout] 2 | key: i32, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `taking_mutable_sample` [INFO] [stdout] --> src/main.rs:11:4 [INFO] [stdout] | [INFO] [stdout] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function is never used: `mutable_binding_function_calls` [INFO] [stdout] --> src/main.rs:42:4 [INFO] [stdout] | [INFO] [stdout] 42 | fn mutable_binding_function_calls() { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 13 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.43s [INFO] running `Command { std: "docker" "inspect" "177f66824aaa6de81f9f3faae74d5bb028ea27ea3813d5de6b8cd0ae1d0d9509", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "177f66824aaa6de81f9f3faae74d5bb028ea27ea3813d5de6b8cd0ae1d0d9509", kill_on_drop: false }` [INFO] [stdout] 177f66824aaa6de81f9f3faae74d5bb028ea27ea3813d5de6b8cd0ae1d0d9509 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:b8eeb62f26c39b23691079a6cb6de528d8e88b4d71a8f6b1d30f8ba7d9c16de9" "/opt/rustwide/cargo-home/bin/cargo" "+1.49.0" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 587a3177c9b0549f600316ab052bd7ca81bf8e2ab27a027fdd9ce85fd75a2b3e [INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap. [INFO] running `Command { std: "docker" "start" "-a" "587a3177c9b0549f600316ab052bd7ca81bf8e2ab27a027fdd9ce85fd75a2b3e", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:9:24 [INFO] [stderr] | [INFO] [stderr] 9 | fn taking_owned_sample(sample: Sample) {} [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:10:25 [INFO] [stderr] | [INFO] [stderr] 10 | fn taking_shared_sample(sample: &Sample) {} [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:11:26 [INFO] [stderr] | [INFO] [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `sample` [INFO] [stderr] --> src/main.rs:37:9 [INFO] [stderr] | [INFO] [stderr] 37 | let sample = Sample { key: 1 }; [INFO] [stderr] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_sample` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:44:9 [INFO] [stderr] | [INFO] [stderr] 44 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:60:9 [INFO] [stderr] | [INFO] [stderr] 60 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:113:9 [INFO] [stderr] | [INFO] [stderr] 113 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:121:9 [INFO] [stderr] | [INFO] [stderr] 121 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:130:9 [INFO] [stderr] | [INFO] [stderr] 130 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:137:9 [INFO] [stderr] | [INFO] [stderr] 137 | let mut sample = Sample { key: 1 }; [INFO] [stderr] | ----^^^^^^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] [INFO] [stderr] warning: field is never read: `key` [INFO] [stderr] --> src/main.rs:2:3 [INFO] [stderr] | [INFO] [stderr] 2 | key: i32, [INFO] [stderr] | ^^^^^^^^ [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(dead_code)]` on by default [INFO] [stderr] [INFO] [stderr] warning: function is never used: `taking_mutable_sample` [INFO] [stderr] --> src/main.rs:11:4 [INFO] [stderr] | [INFO] [stderr] 11 | fn taking_mutable_sample(sample: &mut Sample) {} [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: function is never used: `mutable_binding_function_calls` [INFO] [stderr] --> src/main.rs:42:4 [INFO] [stderr] | [INFO] [stderr] 42 | fn mutable_binding_function_calls() { [INFO] [stderr] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stderr] [INFO] [stderr] warning: 13 warnings emitted [INFO] [stderr] [INFO] [stderr] Finished test [unoptimized + debuginfo] target(s) in 0.01s [INFO] [stderr] Running /opt/rustwide/target/debug/deps/practice-fd593ebc702010b0 [INFO] [stdout] [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "587a3177c9b0549f600316ab052bd7ca81bf8e2ab27a027fdd9ce85fd75a2b3e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "587a3177c9b0549f600316ab052bd7ca81bf8e2ab27a027fdd9ce85fd75a2b3e", kill_on_drop: false }` [INFO] [stdout] 587a3177c9b0549f600316ab052bd7ca81bf8e2ab27a027fdd9ce85fd75a2b3e