[INFO] cloning repository https://github.com/randomdevforyou/rust-random [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/randomdevforyou/rust-random" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frandomdevforyou%2Frust-random", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frandomdevforyou%2Frust-random'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 0f845e76aa144b7f45e93d91104058744d870859 [INFO] checking randomdevforyou/rust-random against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frandomdevforyou%2Frust-random" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/randomdevforyou/rust-random 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/randomdevforyou/rust-random [INFO] finished tweaking git repo https://github.com/randomdevforyou/rust-random [INFO] tweaked toml for git repo https://github.com/randomdevforyou/rust-random written to /workspace/builds/worker-3-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/randomdevforyou/rust-random 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-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 25dcc0ef5424054434cbbaf0242c12d209e5dc298224d1ed68bb6dd14430d02e [INFO] running `Command { std: "docker" "start" "-a" "25dcc0ef5424054434cbbaf0242c12d209e5dc298224d1ed68bb6dd14430d02e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "25dcc0ef5424054434cbbaf0242c12d209e5dc298224d1ed68bb6dd14430d02e", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "25dcc0ef5424054434cbbaf0242c12d209e5dc298224d1ed68bb6dd14430d02e", kill_on_drop: false }` [INFO] [stdout] 25dcc0ef5424054434cbbaf0242c12d209e5dc298224d1ed68bb6dd14430d02e [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-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] 7547c868df26b910a825676b2f6e073e23d6687349f6f024d7092922a1078281 [INFO] running `Command { std: "docker" "start" "-a" "7547c868df26b910a825676b2f6e073e23d6687349f6f024d7092922a1078281", kill_on_drop: false }` [INFO] [stderr] Checking regex-syntax v0.7.2 [INFO] [stderr] Checking aho-corasick v1.0.2 [INFO] [stderr] Checking regex v1.8.4 [INFO] [stderr] Checking rust-random v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/strings.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let hello = String::from("Hello"); //immutable string [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello_slice` [INFO] [stdout] --> src/strings.rs:35:9 [INFO] [stdout] | [INFO] [stdout] 35 | let hello_slice = &mut hello[0..5]; [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_slice` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word_slice` [INFO] [stdout] --> src/strings.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let word_slice = &mut hello[7..]; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_slice` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `reverse` [INFO] [stdout] --> src/strings.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let reverse = hello.chars().rev().collect::(); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reverse` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello` [INFO] [stdout] --> src/strings.rs:5:9 [INFO] [stdout] | [INFO] [stdout] 5 | let hello = String::from("Hello"); //immutable string [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello_slice` [INFO] [stdout] --> src/strings.rs:35:9 [INFO] [stdout] | [INFO] [stdout] 35 | let hello_slice = &mut hello[0..5]; [INFO] [stdout] | ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_slice` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word_slice` [INFO] [stdout] --> src/strings.rs:37:9 [INFO] [stdout] | [INFO] [stdout] 37 | let word_slice = &mut hello[7..]; [INFO] [stdout] | ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_word_slice` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `reverse` [INFO] [stdout] --> src/strings.rs:60:9 [INFO] [stdout] | [INFO] [stdout] 60 | let reverse = hello.chars().rev().collect::(); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_reverse` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter` [INFO] [stdout] --> src/iterator.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::iter; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `second` [INFO] [stdout] --> src/vectors.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let second = v1.get(1).unwrap(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice` [INFO] [stdout] --> src/vectors.rs:189:9 [INFO] [stdout] | [INFO] [stdout] 189 | let slice = &v15[..]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice2` [INFO] [stdout] --> src/vectors.rs:191:9 [INFO] [stdout] | [INFO] [stdout] 191 | let slice2 = &mut v15[..]; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello_world_string` [INFO] [stdout] --> src/strings2.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let hello_world_string = hello_string + &world_string; // It takes ownership of hello_string and returns it back [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_world_string` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 4 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `hello_world_string` [INFO] [stdout] --> src/strings2.rs:73:9 [INFO] [stdout] | [INFO] [stdout] 73 | let hello_world_string = hello_string + &world_string; // It takes ownership of hello_string and returns it back [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_hello_world_string` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `new_str` [INFO] [stdout] --> src/strings2.rs:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | let new_str = hello_str.push('o'); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_str` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `new_str2` [INFO] [stdout] --> src/strings2.rs:102:9 [INFO] [stdout] | [INFO] [stdout] 102 | let new_str2 = hello_str.push_str(", World"); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_str2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `first` [INFO] [stdout] --> src/strings2.rs:111:9 [INFO] [stdout] | [INFO] [stdout] 111 | let first = &hello_str[0..1]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_first` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `second` [INFO] [stdout] --> src/strings2.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | let second = &hello_str[1..2]; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `new_str` [INFO] [stdout] --> src/strings2.rs:100:9 [INFO] [stdout] | [INFO] [stdout] 100 | let new_str = hello_str.push('o'); [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_str` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `new_str2` [INFO] [stdout] --> src/strings2.rs:102:9 [INFO] [stdout] | [INFO] [stdout] 102 | let new_str2 = hello_str.push_str(", World"); [INFO] [stdout] | ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_new_str2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `first` [INFO] [stdout] --> src/strings2.rs:111:9 [INFO] [stdout] | [INFO] [stdout] 111 | let first = &hello_str[0..1]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_first` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `second` [INFO] [stdout] --> src/strings2.rs:113:9 [INFO] [stdout] | [INFO] [stdout] 113 | let second = &hello_str[1..2]; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/vectors.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let mut first = &mut v3[0]; [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/vectors.rs:161:9 [INFO] [stdout] | [INFO] [stdout] 161 | let mut iter = v13.iter_mut(); [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/vectors.rs:241:9 [INFO] [stdout] | [INFO] [stdout] 241 | let mut v22 = vec![1,2,3,4,5]; [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/strings2.rs:69:9 [INFO] [stdout] | [INFO] [stdout] 69 | let mut hello_string = "Hello".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/strings2.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | let mut hello_string = "Hello"; [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/strings2.rs:109:9 [INFO] [stdout] | [INFO] [stdout] 109 | let mut hello_str = String::from("hello"); [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/strings2.rs:69:9 [INFO] [stdout] | [INFO] [stdout] 69 | let mut hello_string = "Hello".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/strings2.rs:75:9 [INFO] [stdout] | [INFO] [stdout] 75 | let mut hello_string = "Hello"; [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/strings2.rs:109:9 [INFO] [stdout] | [INFO] [stdout] 109 | let mut hello_str = String::from("hello"); [INFO] [stdout] | ----^^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `iter` [INFO] [stdout] --> src/iterator.rs:128:13 [INFO] [stdout] | [INFO] [stdout] 128 | let mut iter = a.iter(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_iter` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/iterator.rs:128:9 [INFO] [stdout] | [INFO] [stdout] 128 | let mut iter = a.iter(); [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: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `second` [INFO] [stdout] --> src/vectors.rs:22:9 [INFO] [stdout] | [INFO] [stdout] 22 | let second = v1.get(1).unwrap(); [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_second` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice` [INFO] [stdout] --> src/vectors.rs:189:9 [INFO] [stdout] | [INFO] [stdout] 189 | let slice = &v15[..]; [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_slice` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `slice2` [INFO] [stdout] --> src/vectors.rs:191:9 [INFO] [stdout] | [INFO] [stdout] 191 | let slice2 = &mut v15[..]; [INFO] [stdout] | ^^^^^^ help: if this is intentional, prefix it with an underscore: `_slice2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/vectors.rs:43:9 [INFO] [stdout] | [INFO] [stdout] 43 | let mut first = &mut v3[0]; [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/vectors.rs:161:9 [INFO] [stdout] | [INFO] [stdout] 161 | let mut iter = v13.iter_mut(); [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/vectors.rs:241:9 [INFO] [stdout] | [INFO] [stdout] 241 | let mut v22 = vec![1,2,3,4,5]; [INFO] [stdout] | ----^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::collections::HashMap` [INFO] [stdout] --> src/problems/cat.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::collections::HashMap; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::collections::HashMap` [INFO] [stdout] --> src/problems/cat.rs:5:5 [INFO] [stdout] | [INFO] [stdout] 5 | use std::collections::HashMap; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::iter` [INFO] [stdout] --> src/iterator.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use std::iter; [INFO] [stdout] | ^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_imports)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 6 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `iter` [INFO] [stdout] --> src/iterator.rs:128:13 [INFO] [stdout] | [INFO] [stdout] 128 | let mut iter = a.iter(); [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_iter` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 1 warning emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/iterator.rs:128:9 [INFO] [stdout] | [INFO] [stdout] 128 | let mut iter = a.iter(); [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: 3 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 3.06s [INFO] running `Command { std: "docker" "inspect" "7547c868df26b910a825676b2f6e073e23d6687349f6f024d7092922a1078281", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "7547c868df26b910a825676b2f6e073e23d6687349f6f024d7092922a1078281", kill_on_drop: false }` [INFO] [stdout] 7547c868df26b910a825676b2f6e073e23d6687349f6f024d7092922a1078281