[INFO] cloning repository https://github.com/ynishimura/rust-gear-book-playground [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ynishimura/rust-gear-book-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fynishimura%2Frust-gear-book-playground", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fynishimura%2Frust-gear-book-playground'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] c438dcfb8cb703b36dc16bcaea8c5b65b5db92bc [INFO] checking ynishimura/rust-gear-book-playground against master#385fa9d845dd326c6bbfd58c22244215e431948a for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fynishimura%2Frust-gear-book-playground" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/ynishimura/rust-gear-book-playground on toolchain 385fa9d845dd326c6bbfd58c22244215e431948a [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/ynishimura/rust-gear-book-playground [INFO] finished tweaking git repo https://github.com/ynishimura/rust-gear-book-playground [INFO] tweaked toml for git repo https://github.com/ynishimura/rust-gear-book-playground written to /workspace/builds/worker-4-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/ynishimura/rust-gear-book-playground already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] d69abec8d32d77f9cbcd97cb3e46353ecdee116f7c189ad5590d9a0fe7145894 [INFO] running `Command { std: "docker" "start" "-a" "d69abec8d32d77f9cbcd97cb3e46353ecdee116f7c189ad5590d9a0fe7145894", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "d69abec8d32d77f9cbcd97cb3e46353ecdee116f7c189ad5590d9a0fe7145894", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "d69abec8d32d77f9cbcd97cb3e46353ecdee116f7c189ad5590d9a0fe7145894", kill_on_drop: false }` [INFO] [stdout] d69abec8d32d77f9cbcd97cb3e46353ecdee116f7c189ad5590d9a0fe7145894 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+385fa9d845dd326c6bbfd58c22244215e431948a" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 3a05e3849b3fad87794233d50104acb070e743e7d1e3652fe449816e81198bc1 [INFO] running `Command { std: "docker" "start" "-a" "3a05e3849b3fad87794233d50104acb070e743e7d1e3652fe449816e81198bc1", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.30 [INFO] [stderr] Compiling syn v1.0.80 [INFO] [stderr] Compiling libc v0.2.104 [INFO] [stderr] Compiling futures-channel v0.3.17 [INFO] [stderr] Compiling futures-util v0.3.17 [INFO] [stderr] Checking slab v0.4.5 [INFO] [stderr] Checking ppv-lite86 v0.2.14 [INFO] [stderr] Compiling quote v1.0.10 [INFO] [stderr] Checking getrandom v0.1.16 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Compiling futures-macro v0.3.17 [INFO] [stderr] Compiling fstrings-proc-macro v0.2.3 [INFO] [stderr] Compiling tokio-macros v0.2.6 [INFO] [stderr] Checking tokio v0.2.25 [INFO] [stderr] Checking fstrings v0.2.3 [INFO] [stderr] Checking futures-executor v0.3.17 [INFO] [stderr] Checking futures v0.3.17 [INFO] [stderr] Checking rust-gear-book-playground v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/module_b.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let y = &x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/module_b.rs:40:9 [INFO] [stdout] | [INFO] [stdout] 40 | let mut important_data = "Hello World".to_string(); [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/share_thread.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let mut data = Arc::new(Mutex::new(vec![1; 10])); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/module_b.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 53 | struct Color { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/module_c.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | dbg!(handle.join()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/module_b.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let y = &x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/module_b.rs:40:9 [INFO] [stdout] | [INFO] [stdout] 40 | let mut important_data = "Hello World".to_string(); [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/share_thread.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let mut data = Arc::new(Mutex::new(vec![1; 10])); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/module_b.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 53 | struct Color { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/module_c.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | dbg!(handle.join()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Anger` is never constructed [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 52 | enum Emotion { [INFO] [stdout] | ------- variant in this enum [INFO] [stdout] 53 | Anger, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_anger` and `tall_state` are never used [INFO] [stdout] --> src/main.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 57 | trait Emotional { [INFO] [stdout] | --------- methods in this trait [INFO] [stdout] 58 | fn get_happy(&mut self) -> String; [INFO] [stdout] 59 | fn get_anger(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] 60 | fn tall_state(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `state` is never read [INFO] [stdout] --> src/main.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 63 | struct HappyPerson { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 64 | name: String, [INFO] [stdout] 65 | state: Emotion, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Iter` is never constructed [INFO] [stdout] --> src/main.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | struct Iter { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Anger` is never constructed [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 52 | enum Emotion { [INFO] [stdout] | ------- variant in this enum [INFO] [stdout] 53 | Anger, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_anger` and `tall_state` are never used [INFO] [stdout] --> src/main.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 57 | trait Emotional { [INFO] [stdout] | --------- methods in this trait [INFO] [stdout] 58 | fn get_happy(&mut self) -> String; [INFO] [stdout] 59 | fn get_anger(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] 60 | fn tall_state(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `state` is never read [INFO] [stdout] --> src/main.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 63 | struct HappyPerson { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 64 | name: String, [INFO] [stdout] 65 | state: Emotion, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Iter` is never constructed [INFO] [stdout] --> src/main.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | struct Iter { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 11.88s [INFO] running `Command { std: "docker" "inspect" "3a05e3849b3fad87794233d50104acb070e743e7d1e3652fe449816e81198bc1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "3a05e3849b3fad87794233d50104acb070e743e7d1e3652fe449816e81198bc1", kill_on_drop: false }` [INFO] [stdout] 3a05e3849b3fad87794233d50104acb070e743e7d1e3652fe449816e81198bc1 [INFO] checking ynishimura/rust-gear-book-playground against try#645bb72776a6a56a1a8f52631a44bd082b2ba509 for absurd-question-mark-desugar [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fynishimura%2Frust-gear-book-playground" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/ynishimura/rust-gear-book-playground on toolchain 645bb72776a6a56a1a8f52631a44bd082b2ba509 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/ynishimura/rust-gear-book-playground [INFO] finished tweaking git repo https://github.com/ynishimura/rust-gear-book-playground [INFO] tweaked toml for git repo https://github.com/ynishimura/rust-gear-book-playground written to /workspace/builds/worker-4-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/ynishimura/rust-gear-book-playground already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] bd855fcf18fc0b44442818a553fb76cde82b64469fbd78785e5fbfeefeb8dc6c [INFO] running `Command { std: "docker" "start" "-a" "bd855fcf18fc0b44442818a553fb76cde82b64469fbd78785e5fbfeefeb8dc6c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "bd855fcf18fc0b44442818a553fb76cde82b64469fbd78785e5fbfeefeb8dc6c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "bd855fcf18fc0b44442818a553fb76cde82b64469fbd78785e5fbfeefeb8dc6c", kill_on_drop: false }` [INFO] [stdout] bd855fcf18fc0b44442818a553fb76cde82b64469fbd78785e5fbfeefeb8dc6c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/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=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+645bb72776a6a56a1a8f52631a44bd082b2ba509" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] f4e6a094f42835458772331154d3187cc22a80269fc8911e976362abd1504bc8 [INFO] running `Command { std: "docker" "start" "-a" "f4e6a094f42835458772331154d3187cc22a80269fc8911e976362abd1504bc8", kill_on_drop: false }` [INFO] [stderr] Compiling proc-macro2 v1.0.30 [INFO] [stderr] Compiling syn v1.0.80 [INFO] [stderr] Compiling libc v0.2.104 [INFO] [stderr] Compiling futures-channel v0.3.17 [INFO] [stderr] Compiling futures-util v0.3.17 [INFO] [stderr] Checking slab v0.4.5 [INFO] [stderr] Checking ppv-lite86 v0.2.14 [INFO] [stderr] Compiling quote v1.0.10 [INFO] [stderr] Checking getrandom v0.1.16 [INFO] [stderr] Checking rand_core v0.5.1 [INFO] [stderr] Checking rand_chacha v0.2.2 [INFO] [stderr] Checking rand v0.7.3 [INFO] [stderr] Compiling futures-macro v0.3.17 [INFO] [stderr] Compiling fstrings-proc-macro v0.2.3 [INFO] [stderr] Compiling tokio-macros v0.2.6 [INFO] [stderr] Checking tokio v0.2.25 [INFO] [stderr] Checking fstrings v0.2.3 [INFO] [stderr] Checking futures-executor v0.3.17 [INFO] [stderr] Checking futures v0.3.17 [INFO] [stderr] Checking rust-gear-book-playground v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/module_b.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let y = &x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/module_b.rs:40:9 [INFO] [stdout] | [INFO] [stdout] 40 | let mut important_data = "Hello World".to_string(); [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/share_thread.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let mut data = Arc::new(Mutex::new(vec![1; 10])); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/module_b.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 53 | struct Color { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/module_c.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | dbg!(handle.join()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `y` [INFO] [stdout] --> src/module_b.rs:46:9 [INFO] [stdout] | [INFO] [stdout] 46 | let y = &x; [INFO] [stdout] | ^ help: if this is intentional, prefix it with an underscore: `_y` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Anger` is never constructed [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 52 | enum Emotion { [INFO] [stdout] | ------- variant in this enum [INFO] [stdout] 53 | Anger, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_anger` and `tall_state` are never used [INFO] [stdout] --> src/main.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 57 | trait Emotional { [INFO] [stdout] | --------- methods in this trait [INFO] [stdout] 58 | fn get_happy(&mut self) -> String; [INFO] [stdout] 59 | fn get_anger(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] 60 | fn tall_state(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `state` is never read [INFO] [stdout] --> src/main.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 63 | struct HappyPerson { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 64 | name: String, [INFO] [stdout] 65 | state: Emotion, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Iter` is never constructed [INFO] [stdout] --> src/main.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | struct Iter { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/module_b.rs:40:9 [INFO] [stdout] | [INFO] [stdout] 40 | let mut important_data = "Hello World".to_string(); [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/share_thread.rs:6:9 [INFO] [stdout] | [INFO] [stdout] 6 | let mut data = Arc::new(Mutex::new(vec![1; 10])); [INFO] [stdout] | ----^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Color` is never constructed [INFO] [stdout] --> src/module_b.rs:53:8 [INFO] [stdout] | [INFO] [stdout] 53 | struct Color { [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/module_c.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 7 | dbg!(handle.join()); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: this `Result` may be an `Err` variant, which should be handled [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] = note: this warning originates in the macro `dbg` (in Nightly builds, run with -Z macro-backtrace for more info) [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 5 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Anger` is never constructed [INFO] [stdout] --> src/main.rs:53:5 [INFO] [stdout] | [INFO] [stdout] 52 | enum Emotion { [INFO] [stdout] | ------- variant in this enum [INFO] [stdout] 53 | Anger, [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: methods `get_anger` and `tall_state` are never used [INFO] [stdout] --> src/main.rs:59:8 [INFO] [stdout] | [INFO] [stdout] 57 | trait Emotional { [INFO] [stdout] | --------- methods in this trait [INFO] [stdout] 58 | fn get_happy(&mut self) -> String; [INFO] [stdout] 59 | fn get_anger(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] 60 | fn tall_state(&mut self) -> String; [INFO] [stdout] | ^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `state` is never read [INFO] [stdout] --> src/main.rs:65:5 [INFO] [stdout] | [INFO] [stdout] 63 | struct HappyPerson { [INFO] [stdout] | ----------- field in this struct [INFO] [stdout] 64 | name: String, [INFO] [stdout] 65 | state: Emotion, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: struct `Iter` is never constructed [INFO] [stdout] --> src/main.rs:94:8 [INFO] [stdout] | [INFO] [stdout] 94 | struct Iter { [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 14.62s [INFO] running `Command { std: "docker" "inspect" "f4e6a094f42835458772331154d3187cc22a80269fc8911e976362abd1504bc8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f4e6a094f42835458772331154d3187cc22a80269fc8911e976362abd1504bc8", kill_on_drop: false }` [INFO] [stdout] f4e6a094f42835458772331154d3187cc22a80269fc8911e976362abd1504bc8