[INFO] cloning repository https://github.com/Hubert51/rust_ws
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Hubert51/rust_ws" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHubert51%2Frust_ws", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHubert51%2Frust_ws'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 20e2557333d6ce821990fe3d9c0058bbc316a0d3
[INFO] testing Hubert51/rust_ws against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_in_2025-retry-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHubert51%2Frust_ws" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/Hubert51/rust_ws
[INFO] finished tweaking git repo https://github.com/Hubert51/rust_ws
[INFO] tweaked toml for git repo https://github.com/Hubert51/rust_ws written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/Hubert51/rust_ws on toolchain 8de4c7234dd9b97c9d76b58671343fdbbc9a433e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/Hubert51/rust_ws 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" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "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-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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] df2f43f2e1bdb64d9fb028ce53e59b9057cda70aca954a90e988c9863c450af4
[INFO] running `Command { std: "docker" "start" "-a" "df2f43f2e1bdb64d9fb028ce53e59b9057cda70aca954a90e988c9863c450af4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "df2f43f2e1bdb64d9fb028ce53e59b9057cda70aca954a90e988c9863c450af4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "df2f43f2e1bdb64d9fb028ce53e59b9057cda70aca954a90e988c9863c450af4", kill_on_drop: false }`
[INFO] [stdout] df2f43f2e1bdb64d9fb028ce53e59b9057cda70aca954a90e988c9863c450af4
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "build" "--frozen" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 2126d8179a0f792cc95a285403649747be83f4779b55e5bbd022930a0a7b1692
[INFO] running `Command { std: "docker" "start" "-a" "2126d8179a0f792cc95a285403649747be83f4779b55e5bbd022930a0a7b1692", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.137
[INFO] [stderr]    Compiling ppv-lite86 v0.2.16
[INFO] [stderr]    Compiling getrandom v0.2.8
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]    Compiling rand v0.8.5
[INFO] [stderr]    Compiling rust_ws v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `spaces`
[INFO] [stdout]   --> src/bin/3_1_variables.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let spaces = spaces.len();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `THREE_HOURS_IN_SECONDS` is never used
[INFO] [stdout]   --> src/bin/3_1_variables.rs:12:11
[INFO] [stdout]    |
[INFO] [stdout] 12 |     const THREE_HOURS_IN_SECONDS: u32 = 60 * 60 * 3;
[INFO] [stdout]    |           ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::arch::x86_64::CpuidResult`
[INFO] [stdout]  --> src/bin/5_1_struct.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::arch::x86_64::CpuidResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user1`
[INFO] [stdout]   --> src/bin/5_1_struct.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let user1 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let r1 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/bin/3_2_compound_types.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let (x, y, z) = tup;
[INFO] [stdout]   |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let r2 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let word = first_word(&my_string[0..6]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let word = first_word(&my_string[..]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let word = first_word(&my_string);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user3`
[INFO] [stdout]   --> src/bin/5_1_struct.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let user3 = User{
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let word = first_word(&my_string_literal[0..6]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let word = first_word(&my_string_literal[..]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/bin/5_1_struct.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let subject = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let word = first_word(my_string_literal);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active` and `sign_in_count` are never read
[INFO] [stdout]  --> src/bin/5_1_struct.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 4 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 7 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let bytes = s.as_bytes();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> src/bin/5_1_struct.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        -----      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/bin/5_1_struct.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> src/bin/5_1_struct.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Rectangle {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 18 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 19 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]  --> src/bin/3_2_compound_types.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let (x, y, z) = tup;
[INFO] [stdout]   |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/3_2_compound_types.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let a: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 4.33s
[INFO] running `Command { std: "docker" "inspect" "2126d8179a0f792cc95a285403649747be83f4779b55e5bbd022930a0a7b1692", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2126d8179a0f792cc95a285403649747be83f4779b55e5bbd022930a0a7b1692", kill_on_drop: false }`
[INFO] [stdout] 2126d8179a0f792cc95a285403649747be83f4779b55e5bbd022930a0a7b1692
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--no-run" "--message-format=json" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] fff0d93f8314557fe66952469b50570f9ebc3a9d54a5c27a72f7c2a7ef130f4b
[INFO] running `Command { std: "docker" "start" "-a" "fff0d93f8314557fe66952469b50570f9ebc3a9d54a5c27a72f7c2a7ef130f4b", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_ws v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::arch::x86_64::CpuidResult`
[INFO] [stdout]  --> src/bin/5_1_struct.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::arch::x86_64::CpuidResult;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r1`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let r1 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `r2`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:27:9
[INFO] [stdout]    |
[INFO] [stdout] 27 |     let r2 = &s; // no problem
[INFO] [stdout]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let word = first_word(&my_string[0..6]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:42:9
[INFO] [stdout]    |
[INFO] [stdout] 42 |     let word = first_word(&my_string[..]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:45:9
[INFO] [stdout]    |
[INFO] [stdout] 45 |     let word = first_word(&my_string);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:50:9
[INFO] [stdout]    |
[INFO] [stdout] 50 |     let word = first_word(&my_string_literal[0..6]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:51:9
[INFO] [stdout]    |
[INFO] [stdout] 51 |     let word = first_word(&my_string_literal[..]);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user1`
[INFO] [stdout]   --> src/bin/5_1_struct.rs:23:9
[INFO] [stdout]    |
[INFO] [stdout] 23 |     let user1 = User {
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user3`
[INFO] [stdout]   --> src/bin/5_1_struct.rs:43:9
[INFO] [stdout]    |
[INFO] [stdout] 43 |     let user3 = User{
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `subject`
[INFO] [stdout]   --> src/bin/5_1_struct.rs:59:9
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let subject = AlwaysEqual;
[INFO] [stdout]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `word`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:55:9
[INFO] [stdout]    |
[INFO] [stdout] 55 |     let word = first_word(my_string_literal);
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `active` and `sign_in_count` are never read
[INFO] [stdout]  --> src/bin/5_1_struct.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 4 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 7 |     sign_in_count: u64,
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `1` and `2` are never read
[INFO] [stdout]   --> src/bin/5_1_struct.rs:10:19
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Color(i32, i32, i32);
[INFO] [stdout]    |        -----      ^^^  ^^^
[INFO] [stdout]    |        |
[INFO] [stdout]    |        fields in this struct
[INFO] [stdout]    |
[INFO] [stdout]    = help: consider removing these fields
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Point` is never constructed
[INFO] [stdout]   --> src/bin/5_1_struct.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Point(i32, i32, i32);
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> src/bin/5_1_struct.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Rectangle {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout] 18 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 19 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `bytes`
[INFO] [stdout]   --> src/bin/4_1_ownership.rs:82:9
[INFO] [stdout]    |
[INFO] [stdout] 82 |     let bytes = s.as_bytes();
[INFO] [stdout]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `spaces`
[INFO] [stdout]   --> src/bin/3_1_variables.rs:24:9
[INFO] [stdout]    |
[INFO] [stdout] 24 |     let spaces = spaces.len();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]  --> src/bin/3_2_compound_types.rs:8:10
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let (x, y, z) = tup;
[INFO] [stdout]   |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `z`
[INFO] [stdout]  --> src/bin/3_2_compound_types.rs:8:16
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let (x, y, z) = tup;
[INFO] [stdout]   |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `a`
[INFO] [stdout]   --> src/bin/3_2_compound_types.rs:13:9
[INFO] [stdout]    |
[INFO] [stdout] 13 |     let a: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 1.51s
[INFO] running `Command { std: "docker" "inspect" "fff0d93f8314557fe66952469b50570f9ebc3a9d54a5c27a72f7c2a7ef130f4b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fff0d93f8314557fe66952469b50570f9ebc3a9d54a5c27a72f7c2a7ef130f4b", kill_on_drop: false }`
[INFO] [stdout] fff0d93f8314557fe66952469b50570f9ebc3a9d54a5c27a72f7c2a7ef130f4b
[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@sha256:90999bfc7ae267e83380e433d8e61a7c072ca6729e92edbae886d3423b3a6f4c" "/opt/rustwide/cargo-home/bin/cargo" "+8de4c7234dd9b97c9d76b58671343fdbbc9a433e" "test" "--frozen" "--target" "x86_64-unknown-linux-musl", kill_on_drop: false }`
[INFO] [stdout] 1d9b5d46b8c694eccd1a13616dcaedf8ec56ab76ef55fa57371908589f6867d8
[INFO] running `Command { std: "docker" "start" "-a" "1d9b5d46b8c694eccd1a13616dcaedf8ec56ab76ef55fa57371908589f6867d8", kill_on_drop: false }`
[INFO] [stderr] warning: unused variable: `spaces`
[INFO] [stderr]   --> src/bin/3_1_variables.rs:24:9
[INFO] [stderr]    |
[INFO] [stderr] 24 |     let spaces = spaces.len();
[INFO] [stderr]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_spaces`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_ws` (bin "variables" test) generated 1 warning
[INFO] [stderr] warning: unused import: `std::arch::x86_64::CpuidResult`
[INFO] [stderr]  --> src/bin/5_1_struct.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::arch::x86_64::CpuidResult;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user1`
[INFO] [stderr]   --> src/bin/5_1_struct.rs:23:9
[INFO] [stderr]    |
[INFO] [stderr] 23 |     let user1 = User {
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `user3`
[INFO] [stderr]   --> src/bin/5_1_struct.rs:43:9
[INFO] [stderr]    |
[INFO] [stderr] 43 |     let user3 = User{
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_user3`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `subject`
[INFO] [stderr]   --> src/bin/5_1_struct.rs:59:9
[INFO] [stderr]    |
[INFO] [stderr] 59 |     let subject = AlwaysEqual;
[INFO] [stderr]    |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_subject`
[INFO] [stderr] 
[INFO] [stderr] warning: fields `active` and `sign_in_count` are never read
[INFO] [stderr]  --> src/bin/5_1_struct.rs:4:5
[INFO] [stderr]   |
[INFO] [stderr] 3 | struct User {
[INFO] [stderr]   |        ---- fields in this struct
[INFO] [stderr] 4 |     active: bool,
[INFO] [stderr]   |     ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 7 |     sign_in_count: u64,
[INFO] [stderr]   |     ^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: fields `1` and `2` are never read
[INFO] [stderr]   --> src/bin/5_1_struct.rs:10:19
[INFO] [stderr]    |
[INFO] [stderr] 10 | struct Color(i32, i32, i32);
[INFO] [stderr]    |        -----      ^^^  ^^^
[INFO] [stderr]    |        |
[INFO] [stderr]    |        fields in this struct
[INFO] [stderr]    |
[INFO] [stderr]    = help: consider removing these fields
[INFO] [stderr] 
[INFO] [stderr] warning: struct `Point` is never constructed
[INFO] [stderr]   --> src/bin/5_1_struct.rs:11:8
[INFO] [stderr]    |
[INFO] [stderr] 11 | struct Point(i32, i32, i32);
[INFO] [stderr]    |        ^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: fields `width` and `height` are never read
[INFO] [stderr]   --> src/bin/5_1_struct.rs:18:5
[INFO] [stderr]    |
[INFO] [stderr] 17 | struct Rectangle {
[INFO] [stderr]    |        --------- fields in this struct
[INFO] [stderr] 18 |     width: u32,
[INFO] [stderr]    |     ^^^^^
[INFO] [stderr] 19 |     height: u32,
[INFO] [stderr]    |     ^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `Rectangle` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_ws` (bin "struct" test) generated 8 warnings (run `cargo fix --bin "struct" --tests` to apply 1 suggestion)
[INFO] [stderr] warning: unused variable: `x`
[INFO] [stderr]  --> src/bin/3_2_compound_types.rs:8:10
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let (x, y, z) = tup;
[INFO] [stderr]   |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `z`
[INFO] [stderr]  --> src/bin/3_2_compound_types.rs:8:16
[INFO] [stderr]   |
[INFO] [stderr] 8 |     let (x, y, z) = tup;
[INFO] [stderr]   |                ^ help: if this is intentional, prefix it with an underscore: `_z`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `a`
[INFO] [stderr]   --> src/bin/3_2_compound_types.rs:13:9
[INFO] [stderr]    |
[INFO] [stderr] 13 |     let a: [i32; 5] = [1, 2, 3, 4, 5];
[INFO] [stderr]    |         ^ help: if this is intentional, prefix it with an underscore: `_a`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r1`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:26:9
[INFO] [stderr]    |
[INFO] [stderr] 26 |     let r1 = &s; // no problem
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r1`
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `r2`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:27:9
[INFO] [stderr]    |
[INFO] [stderr] 27 |     let r2 = &s; // no problem
[INFO] [stderr]    |         ^^ help: if this is intentional, prefix it with an underscore: `_r2`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:41:9
[INFO] [stderr]    |
[INFO] [stderr] 41 |     let word = first_word(&my_string[0..6]);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:42:9
[INFO] [stderr]    |
[INFO] [stderr] 42 |     let word = first_word(&my_string[..]);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:45:9
[INFO] [stderr]    |
[INFO] [stderr] 45 |     let word = first_word(&my_string);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:50:9
[INFO] [stderr]    |
[INFO] [stderr] 50 |     let word = first_word(&my_string_literal[0..6]);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:51:9
[INFO] [stderr]    |
[INFO] [stderr] 51 |     let word = first_word(&my_string_literal[..]);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `word`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:55:9
[INFO] [stderr]    |
[INFO] [stderr] 55 |     let word = first_word(my_string_literal);
[INFO] [stderr]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_word`
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `bytes`
[INFO] [stderr]   --> src/bin/4_1_ownership.rs:82:9
[INFO] [stderr]    |
[INFO] [stderr] 82 |     let bytes = s.as_bytes();
[INFO] [stderr]    |         ^^^^^ help: if this is intentional, prefix it with an underscore: `_bytes`
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_ws` (bin "compound_types" test) generated 3 warnings
[INFO] [stderr] warning: `rust_ws` (bin "ownership" test) generated 9 warnings
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.03s
[INFO] [stderr]      Running unittests src/bin/3_2_compound_types.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/compound_types-03c80b3c5d3e6550)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/3_4_control_flow.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/control_flow-fcf40abcdd1a38d6)
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/3_3_functions.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/functions-5c1874a8a3faeb63)
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/guessing_game.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/guessing_game-b42755289dd75e69)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/helper.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/helper-3b6fb14e5081b791)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/main2.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/main2-c723bb80931ccfa1)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/bin/4_1_ownership.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/ownership-801e149ae5fa4a85)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/rust_ws-f6b0edfa16272720)
[INFO] [stderr]      Running unittests src/bin/5_1_struct.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/struct-065f76713345f67e)
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stderr]      Running unittests src/bin/3_1_variables.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/variables-e17f4f443d0986e3)
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[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; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "1d9b5d46b8c694eccd1a13616dcaedf8ec56ab76ef55fa57371908589f6867d8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1d9b5d46b8c694eccd1a13616dcaedf8ec56ab76ef55fa57371908589f6867d8", kill_on_drop: false }`
[INFO] [stdout] 1d9b5d46b8c694eccd1a13616dcaedf8ec56ab76ef55fa57371908589f6867d8