[INFO] cloning repository https://github.com/sigpher/trplcn
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sigpher/trplcn" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Ftrplcn", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Ftrplcn'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a6886062d582d66ba3da0cd2eca3a71bec7f817e
[INFO] fixing sigpher/trplcn against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsigpher%2Ftrplcn" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sigpher/trplcn
[INFO] finished tweaking git repo https://github.com/sigpher/trplcn
[INFO] tweaked toml for git repo https://github.com/sigpher/trplcn written to /workspace/builds/worker-2-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sigpher/trplcn on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/sigpher/trplcn 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" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded trpl v0.2.0
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[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc1/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298
[INFO] running `Command { std: "docker" "start" "5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
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[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> ch03/src/data_type.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> ch03/src/data_type.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let x = 1.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> ch03/src/data_type.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let y: f32 = 3.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]   --> ch03/src/data_type.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let sum = 4 + 10;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `difference`
[INFO] [stdout]   --> ch03/src/data_type.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let difference = 94.5 - 4.3;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `product`
[INFO] [stdout]   --> ch03/src/data_type.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let product = 3 * 30;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quotient`
[INFO] [stdout]   --> ch03/src/data_type.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let quotient = 55.7 / 32.2;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `truncated`
[INFO] [stdout]   --> ch03/src/data_type.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let truncated = -6 / 3;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_truncated`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `remainder`
[INFO] [stdout]   --> ch03/src/data_type.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let remainder = 42 % 5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remainder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> ch03/src/data_type.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let t = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> ch03/src/data_type.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let f = true;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> ch03/src/data_type.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let c = 'z';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> ch03/src/data_type.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let z: char = 'ℤ';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heart_eyed_cat`
[INFO] [stdout]   --> ch03/src/data_type.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let heart_eyed_cat = '😻';
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heart_eyed_cat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::new();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let s = data.to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let s = String::from("initial contents");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let hello = String::from("السلام عليكم");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let hello = String::from("Dobrý den");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let hello = String::from("नमस्ते");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let hello = String::from("こんにちは");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let hello = String::from("Olá");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let hello = String::from("Здравствуйте");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let hello = String::from("שלום");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let hello = String::from("Hola");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> ch03/src/data_type.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let s2 = s0 + &s1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let s = s0 + "-" + &s1 + "-" + &s2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> ch03/src/data_type.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let b = b'b';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bs`
[INFO] [stdout]   --> ch03/src/data_type.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let bs = b"bytes";
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_bs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]   --> ch03/src/data_type.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::new();
[INFO] [stdout]    |         ----^
[INFO] [stdout]    |         |
[INFO] [stdout]    |         help: remove this `mut`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> ch03/src/data_type.rs:14:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     let x = 1.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]   --> ch03/src/data_type.rs:15:9
[INFO] [stdout]    |
[INFO] [stdout] 15 |     let y: f32 = 3.0;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `sum`
[INFO] [stdout]   --> ch03/src/data_type.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 17 |     let sum = 4 + 10;
[INFO] [stdout]    |         ^^^ help: if this is intentional, prefix it with an underscore: `_sum`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `difference`
[INFO] [stdout]   --> ch03/src/data_type.rs:18:9
[INFO] [stdout]    |
[INFO] [stdout] 18 |     let difference = 94.5 - 4.3;
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_difference`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `product`
[INFO] [stdout]   --> ch03/src/data_type.rs:20:9
[INFO] [stdout]    |
[INFO] [stdout] 20 |     let product = 3 * 30;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_product`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `quotient`
[INFO] [stdout]   --> ch03/src/data_type.rs:22:9
[INFO] [stdout]    |
[INFO] [stdout] 22 |     let quotient = 55.7 / 32.2;
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_quotient`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `truncated`
[INFO] [stdout]   --> ch03/src/data_type.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let truncated = -6 / 3;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_truncated`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `remainder`
[INFO] [stdout]   --> ch03/src/data_type.rs:25:9
[INFO] [stdout]    |
[INFO] [stdout] 25 |     let remainder = 42 % 5;
[INFO] [stdout]    |         ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_remainder`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `t`
[INFO] [stdout]   --> ch03/src/data_type.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let t = false;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_t`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `f`
[INFO] [stdout]   --> ch03/src/data_type.rs:28:9
[INFO] [stdout]    |
[INFO] [stdout] 28 |     let f = true;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_f`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> ch03/src/data_type.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let c = 'z';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]   --> ch03/src/data_type.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let z: char = 'ℤ';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `heart_eyed_cat`
[INFO] [stdout]   --> ch03/src/data_type.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let heart_eyed_cat = '😻';
[INFO] [stdout]    |         ^^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_heart_eyed_cat`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     let mut s = String::new();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:36:9
[INFO] [stdout]    |
[INFO] [stdout] 36 |     let s = data.to_string();
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:38:9
[INFO] [stdout]    |
[INFO] [stdout] 38 |     let s = String::from("initial contents");
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:39:9
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let hello = String::from("السلام عليكم");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let hello = String::from("Dobrý den");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let hello = String::from("Hello");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let hello = String::from("नमस्ते");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let hello = String::from("こんにちは");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:44:9
[INFO] [stdout]    |
[INFO] [stdout] 44 |     let hello = String::from("안녕하세요");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let hello = String::from("你好");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:46:9
[INFO] [stdout]    |
[INFO] [stdout] 46 |     let hello = String::from("Olá");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:47:9
[INFO] [stdout]    |
[INFO] [stdout] 47 |     let hello = String::from("Здравствуйте");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:48:9
[INFO] [stdout]    |
[INFO] [stdout] 48 |     let hello = String::from("שלום");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `hello`
[INFO] [stdout]   --> ch03/src/data_type.rs:49:9
[INFO] [stdout]    |
[INFO] [stdout] 49 |     let hello = String::from("Hola");
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_hello`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s2`
[INFO] [stdout]   --> ch03/src/data_type.rs:63:9
[INFO] [stdout]    |
[INFO] [stdout] 63 |     let s2 = s0 + &s1;
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_s2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `s`
[INFO] [stdout]   --> ch03/src/data_type.rs:69:9
[INFO] [stdout]    |
[INFO] [stdout] 69 |     let s = s0 + "-" + &s1 + "-" + &s2;
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_s`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> ch03/src/data_type.rs:87:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     let b = b'b';
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bs`
[INFO] [stdout]   --> ch03/src/data_type.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 88 |     let bs = b"bytes";
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_bs`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking demo v0.1.0 (/opt/rustwide/workdir/demo)
[INFO] [stderr]     Checking h2 v0.4.12
[INFO] [stdout] error[E0425]: cannot find value `buf` in this scope
[INFO] [stdout]  --> demo/src/main.rs:8:18
[INFO] [stdout]   |
[INFO] [stdout] 8 |     f2.write_all(buf)
[INFO] [stdout]   |                  ^^^ not found in this scope
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0308]: mismatched types
[INFO] [stdout]  --> demo/src/main.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn main() {
[INFO] [stdout]   |          - expected `()` because of default return type
[INFO] [stdout] ...
[INFO] [stdout] 8 |     f2.write_all(buf)
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^ expected `()`, found `Result<(), Error>`
[INFO] [stdout]   |
[INFO] [stdout]   = note: expected unit type `()`
[INFO] [stdout]                   found enum `Result<(), std::io::Error>`
[INFO] [stdout] help: consider using a semicolon here
[INFO] [stdout]   |
[INFO] [stdout] 8 |     f2.write_all(buf);
[INFO] [stdout]   |                      +
[INFO] [stdout] help: consider using `Result::expect` to unwrap the `Result<(), std::io::Error>` value, panicking if the value is a `Result::Err`
[INFO] [stdout]   |
[INFO] [stdout] 8 |     f2.write_all(buf).expect("REASON")
[INFO] [stdout]   |                      +++++++++++++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] Some errors have detailed explanations: E0308, E0425.
[INFO] [stdout] 
[INFO] [stdout] For more information about an error, try `rustc --explain E0308`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `demo` (bin "demo" test) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298", kill_on_drop: false }`
[INFO] [stdout] 5877751c8a9b61e1d58e5fe3516e47092794192fff5fb62c00f46b2198808298
