[INFO] cloning repository https://github.com/tam159/rust_udemy_beginner [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/tam159/rust_udemy_beginner" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftam159%2Frust_udemy_beginner", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftam159%2Frust_udemy_beginner'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 554a02ffcea4e1b7ccda29f45fd7a06ae2b71048 [INFO] checking tam159/rust_udemy_beginner against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftam159%2Frust_udemy_beginner" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/tam159/rust_udemy_beginner on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/tam159/rust_udemy_beginner [INFO] finished tweaking git repo https://github.com/tam159/rust_udemy_beginner [INFO] tweaked toml for git repo https://github.com/tam159/rust_udemy_beginner written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/tam159/rust_udemy_beginner 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] c6d134600d8be5ee437fe78837e5ecf86a2ab145e4ff3a801e948f029fe570ba [INFO] running `Command { std: "docker" "start" "-a" "c6d134600d8be5ee437fe78837e5ecf86a2ab145e4ff3a801e948f029fe570ba", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "c6d134600d8be5ee437fe78837e5ecf86a2ab145e4ff3a801e948f029fe570ba", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "c6d134600d8be5ee437fe78837e5ecf86a2ab145e4ff3a801e948f029fe570ba", kill_on_drop: false }` [INFO] [stdout] c6d134600d8be5ee437fe78837e5ecf86a2ab145e4ff3a801e948f029fe570ba [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5bdb0eb5797236048ef00acf7f7f9e94f1335c045d87dd5b036843bb549552f5 [INFO] running `Command { std: "docker" "start" "-a" "5bdb0eb5797236048ef00acf7f7f9e94f1335c045d87dd5b036843bb549552f5", kill_on_drop: false }` [INFO] [stderr] Compiling libc v0.2.140 [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] Checking rust_udemy_beginner v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: variant `Blue` is never constructed [INFO] [stdout] --> src/sample_enum.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 15 | enum Colors { [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] ... [INFO] [stdout] 18 | Blue, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Colors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/sample_enum.rs:23:10 [INFO] [stdout] | [INFO] [stdout] 23 | Name(String), [INFO] [stdout] | ---- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 23 | Name(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Surname` and `Age` are never constructed [INFO] [stdout] --> src/sample_enum.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 22 | enum Person { [INFO] [stdout] | ------ variants in this enum [INFO] [stdout] 23 | Name(String), [INFO] [stdout] 24 | Surname(String), [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 25 | Age(i32), [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> src/sample_errors.rs:47:4 [INFO] [stdout] | [INFO] [stdout] 47 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/sample_generic.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 21 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 22 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 23 | y: T, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Blue` and `Green` are never constructed [INFO] [stdout] --> src/sample_generic.rs:29:5 [INFO] [stdout] | [INFO] [stdout] 27 | enum Colors { [INFO] [stdout] | ------ variants in this enum [INFO] [stdout] 28 | Red(T), [INFO] [stdout] 29 | Blue(T), [INFO] [stdout] | ^^^^ [INFO] [stdout] 30 | Green(T), [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Colors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/sample_generic.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 34 | struct Point2 { [INFO] [stdout] | ------ fields in this struct [INFO] [stdout] 35 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 36 | y: V, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Point2` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `owner` are never read [INFO] [stdout] --> src/sample_memory.rs:60:5 [INFO] [stdout] | [INFO] [stdout] 59 | struct Dog<'l> { [INFO] [stdout] | --- fields in this struct [INFO] [stdout] 60 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] 61 | owner: &'l Person, // Define the same lifetime for both Dog and Person [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Dog` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `awesome` is never read [INFO] [stdout] --> src/sample_traits.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 6 | struct RustDev { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 7 | awesome: bool, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `awsome` is never read [INFO] [stdout] --> src/sample_traits.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 10 | struct JavaDev { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 11 | awsome: bool, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `color` is never read [INFO] [stdout] --> src/sample_traits.rs:71:5 [INFO] [stdout] | [INFO] [stdout] 70 | struct Cat { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 71 | color: &'static str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused closure that must be used [INFO] [stdout] --> src/main.rs:133:5 [INFO] [stdout] | [INFO] [stdout] 133 | |a: i32, b: i32| println!("{}", a + b); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: closures are lazy and do nothing unless called [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variant `Blue` is never constructed [INFO] [stdout] --> src/sample_enum.rs:18:5 [INFO] [stdout] | [INFO] [stdout] 15 | enum Colors { [INFO] [stdout] | ------ variant in this enum [INFO] [stdout] ... [INFO] [stdout] 18 | Blue, [INFO] [stdout] | ^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Colors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `0` is never read [INFO] [stdout] --> src/sample_enum.rs:23:10 [INFO] [stdout] | [INFO] [stdout] 23 | Name(String), [INFO] [stdout] | ---- ^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | field in this variant [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field [INFO] [stdout] | [INFO] [stdout] 23 | Name(()), [INFO] [stdout] | ~~ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Surname` and `Age` are never constructed [INFO] [stdout] --> src/sample_enum.rs:24:5 [INFO] [stdout] | [INFO] [stdout] 22 | enum Person { [INFO] [stdout] | ------ variants in this enum [INFO] [stdout] 23 | Name(String), [INFO] [stdout] 24 | Surname(String), [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] 25 | Age(i32), [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Person` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `read_username_from_file` is never used [INFO] [stdout] --> src/sample_errors.rs:47:4 [INFO] [stdout] | [INFO] [stdout] 47 | fn read_username_from_file() -> Result { [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/sample_generic.rs:22:5 [INFO] [stdout] | [INFO] [stdout] 21 | struct Point { [INFO] [stdout] | ----- fields in this struct [INFO] [stdout] 22 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 23 | y: T, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Point` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variants `Blue` and `Green` are never constructed [INFO] [stdout] --> src/sample_generic.rs:29:5 [INFO] [stdout] | [INFO] [stdout] 27 | enum Colors { [INFO] [stdout] | ------ variants in this enum [INFO] [stdout] 28 | Red(T), [INFO] [stdout] 29 | Blue(T), [INFO] [stdout] | ^^^^ [INFO] [stdout] 30 | Green(T), [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Colors` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `x` and `y` are never read [INFO] [stdout] --> src/sample_generic.rs:35:5 [INFO] [stdout] | [INFO] [stdout] 34 | struct Point2 { [INFO] [stdout] | ------ fields in this struct [INFO] [stdout] 35 | x: T, [INFO] [stdout] | ^ [INFO] [stdout] 36 | y: V, [INFO] [stdout] | ^ [INFO] [stdout] | [INFO] [stdout] = note: `Point2` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: fields `name` and `owner` are never read [INFO] [stdout] --> src/sample_memory.rs:60:5 [INFO] [stdout] | [INFO] [stdout] 59 | struct Dog<'l> { [INFO] [stdout] | --- fields in this struct [INFO] [stdout] 60 | name: String, [INFO] [stdout] | ^^^^ [INFO] [stdout] 61 | owner: &'l Person, // Define the same lifetime for both Dog and Person [INFO] [stdout] | ^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `Dog` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `awesome` is never read [INFO] [stdout] --> src/sample_traits.rs:7:5 [INFO] [stdout] | [INFO] [stdout] 6 | struct RustDev { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 7 | awesome: bool, [INFO] [stdout] | ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `awsome` is never read [INFO] [stdout] --> src/sample_traits.rs:11:5 [INFO] [stdout] | [INFO] [stdout] 10 | struct JavaDev { [INFO] [stdout] | ------- field in this struct [INFO] [stdout] 11 | awsome: bool, [INFO] [stdout] | ^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `color` is never read [INFO] [stdout] --> src/sample_traits.rs:71:5 [INFO] [stdout] | [INFO] [stdout] 70 | struct Cat { [INFO] [stdout] | --- field in this struct [INFO] [stdout] 71 | color: &'static str, [INFO] [stdout] | ^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused closure that must be used [INFO] [stdout] --> src/main.rs:133:5 [INFO] [stdout] | [INFO] [stdout] 133 | |a: i32, b: i32| println!("{}", a + b); [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: closures are lazy and do nothing unless called [INFO] [stdout] = note: `#[warn(unused_must_use)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 12 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 1.47s [INFO] running `Command { std: "docker" "inspect" "5bdb0eb5797236048ef00acf7f7f9e94f1335c045d87dd5b036843bb549552f5", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5bdb0eb5797236048ef00acf7f7f9e94f1335c045d87dd5b036843bb549552f5", kill_on_drop: false }` [INFO] [stdout] 5bdb0eb5797236048ef00acf7f7f9e94f1335c045d87dd5b036843bb549552f5