[INFO] cloning repository https://github.com/gabrielfonte/rust-course
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gabrielfonte/rust-course" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgabrielfonte%2Frust-course", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgabrielfonte%2Frust-course'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ab4fe98366b05101aad66acabb103b42c5e75648
[INFO] testing gabrielfonte/rust-course against try#8de4c7234dd9b97c9d76b58671343fdbbc9a433e+target=x86_64-unknown-linux-musl for musl_upgrade_1_2_5_with_libc_patch_0
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgabrielfonte%2Frust-course" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/gabrielfonte/rust-course
[INFO] finished tweaking git repo https://github.com/gabrielfonte/rust-course
[INFO] tweaked toml for git repo https://github.com/gabrielfonte/rust-course written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/gabrielfonte/rust-course 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/gabrielfonte/rust-course 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]  Downloading crates ...
[INFO] [stderr]   Downloaded rand_core v0.9.0-alpha.0
[INFO] [stderr]   Downloaded rand_chacha v0.9.0-alpha.0
[INFO] [stderr]   Downloaded zerocopy-derive v0.8.0-alpha.5
[INFO] [stderr]   Downloaded syn v2.0.49
[INFO] [stderr]   Downloaded rand v0.9.0-alpha.0
[INFO] [stderr]   Downloaded zerocopy v0.8.0-alpha.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f76f15f9b3ee78c5aa0a6b0a159123636bb9ef331db5e74f74a40b4947bc2da1
[INFO] running `Command { std: "docker" "start" "-a" "f76f15f9b3ee78c5aa0a6b0a159123636bb9ef331db5e74f74a40b4947bc2da1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f76f15f9b3ee78c5aa0a6b0a159123636bb9ef331db5e74f74a40b4947bc2da1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f76f15f9b3ee78c5aa0a6b0a159123636bb9ef331db5e74f74a40b4947bc2da1", kill_on_drop: false }`
[INFO] [stdout] f76f15f9b3ee78c5aa0a6b0a159123636bb9ef331db5e74f74a40b4947bc2da1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] f21a5b8bbb1b11ee2bb31e4bb78094d4baee37cf1769834e743652b944cb5589
[INFO] running `Command { std: "docker" "start" "-a" "f21a5b8bbb1b11ee2bb31e4bb78094d4baee37cf1769834e743652b944cb5589", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.153
[INFO] [stderr]    Compiling zerocopy v0.8.0-alpha.5
[INFO] [stderr]    Compiling getrandom v0.2.12
[INFO] [stderr]    Compiling rand_core v0.9.0-alpha.0
[INFO] [stderr]    Compiling rand_chacha v0.9.0-alpha.0
[INFO] [stderr]    Compiling rand v0.9.0-alpha.0
[INFO] [stderr]    Compiling rust_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]  --> src/module3_types.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::size_of;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/module3_types.rs:63:6
[INFO] [stdout]    |
[INFO] [stdout] 63 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chip_proportion`
[INFO] [stdout]    --> src/module4_logic.rs:195:30
[INFO] [stdout]     |
[INFO] [stdout] 195 |         Meal::FishAndChips { chip_proportion } => {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^ help: try ignoring the field: `chip_proportion: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]    --> src/module4_logic.rs:316:9
[INFO] [stdout]     |
[INFO] [stdout] 316 |     let x;
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/module4_logic.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 |         x = 3;
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/module4_logic.rs:323:9
[INFO] [stdout]     |
[INFO] [stdout] 323 |     let y = {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `North`, `South`, and `West` are never constructed
[INFO] [stdout]   --> src/module3_types.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     enum CardinalDirection {
[INFO] [stdout]    |          ----------------- variants in this enum
[INFO] [stdout] 78 |         North,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 79 |         East,
[INFO] [stdout] 80 |         South,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 81 |         West,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CardinalDirection` 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: variants `Square` and `Circle` are never constructed
[INFO] [stdout]   --> src/module3_types.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     enum Shape {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 88 |         Square {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |         Circle {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `likes_brownies` is never read
[INFO] [stdout]   --> src/module4_logic.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     struct Person {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |         likes_brownies: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `u32_add_alternative` is never used
[INFO] [stdout]    --> src/module4_logic.rs:353:8
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn u32_add_alternative(a: u32, b: u32) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 2.11s
[INFO] running `Command { std: "docker" "inspect" "f21a5b8bbb1b11ee2bb31e4bb78094d4baee37cf1769834e743652b944cb5589", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f21a5b8bbb1b11ee2bb31e4bb78094d4baee37cf1769834e743652b944cb5589", kill_on_drop: false }`
[INFO] [stdout] f21a5b8bbb1b11ee2bb31e4bb78094d4baee37cf1769834e743652b944cb5589
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 277d8142d3e20bb30e5225f0eda11785361c17b58e4d4c2bff989fb1bb62ea08
[INFO] running `Command { std: "docker" "start" "-a" "277d8142d3e20bb30e5225f0eda11785361c17b58e4d4c2bff989fb1bb62ea08", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_course v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::mem::size_of`
[INFO] [stdout]  --> src/module3_types.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::mem::size_of;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]   --> src/module3_types.rs:63:6
[INFO] [stdout]    |
[INFO] [stdout] 63 |     };
[INFO] [stdout]    |      ^ help: remove this semicolon
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `chip_proportion`
[INFO] [stdout]    --> src/module4_logic.rs:195:30
[INFO] [stdout]     |
[INFO] [stdout] 195 |         Meal::FishAndChips { chip_proportion } => {
[INFO] [stdout]     |                              ^^^^^^^^^^^^^^^ help: try ignoring the field: `chip_proportion: _`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable `x` is assigned to, but never used
[INFO] [stdout]    --> src/module4_logic.rs:316:9
[INFO] [stdout]     |
[INFO] [stdout] 316 |     let x;
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: consider using `_x` instead
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `x` is never read
[INFO] [stdout]    --> src/module4_logic.rs:319:9
[INFO] [stdout]     |
[INFO] [stdout] 319 |         x = 3;
[INFO] [stdout]     |         ^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `y`
[INFO] [stdout]    --> src/module4_logic.rs:323:9
[INFO] [stdout]     |
[INFO] [stdout] 323 |     let y = {
[INFO] [stdout]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `North`, `South`, and `West` are never constructed
[INFO] [stdout]   --> src/module3_types.rs:78:9
[INFO] [stdout]    |
[INFO] [stdout] 77 |     enum CardinalDirection {
[INFO] [stdout]    |          ----------------- variants in this enum
[INFO] [stdout] 78 |         North,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 79 |         East,
[INFO] [stdout] 80 |         South,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 81 |         West,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `CardinalDirection` 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: variants `Square` and `Circle` are never constructed
[INFO] [stdout]   --> src/module3_types.rs:88:9
[INFO] [stdout]    |
[INFO] [stdout] 87 |     enum Shape {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout] 88 |         Square {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 95 |         Circle {
[INFO] [stdout]    |         ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `likes_brownies` is never read
[INFO] [stdout]   --> src/module4_logic.rs:17:9
[INFO] [stdout]    |
[INFO] [stdout] 14 |     struct Person {
[INFO] [stdout]    |            ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 17 |         likes_brownies: bool,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `u32_add_alternative` is never used
[INFO] [stdout]    --> src/module4_logic.rs:353:8
[INFO] [stdout]     |
[INFO] [stdout] 353 |     fn u32_add_alternative(a: u32, b: u32) -> u32 {
[INFO] [stdout]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.36s
[INFO] running `Command { std: "docker" "inspect" "277d8142d3e20bb30e5225f0eda11785361c17b58e4d4c2bff989fb1bb62ea08", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "277d8142d3e20bb30e5225f0eda11785361c17b58e4d4c2bff989fb1bb62ea08", kill_on_drop: false }`
[INFO] [stdout] 277d8142d3e20bb30e5225f0eda11785361c17b58e4d4c2bff989fb1bb62ea08
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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] 7a542bc87ea950ba6db538cbb81b2457be5dca42867be131582b400aa475f39a
[INFO] running `Command { std: "docker" "start" "-a" "7a542bc87ea950ba6db538cbb81b2457be5dca42867be131582b400aa475f39a", kill_on_drop: false }`
[INFO] [stderr] warning: unused import: `std::mem::size_of`
[INFO] [stderr]  --> src/module3_types.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use std::mem::size_of;
[INFO] [stderr]   |     ^^^^^^^^^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unnecessary trailing semicolon
[INFO] [stderr]   --> src/module3_types.rs:63:6
[INFO] [stderr]    |
[INFO] [stderr] 63 |     };
[INFO] [stderr]    |      ^ help: remove this semicolon
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `chip_proportion`
[INFO] [stderr]    --> src/module4_logic.rs:195:30
[INFO] [stderr]     |
[INFO] [stderr] 195 |         Meal::FishAndChips { chip_proportion } => {
[INFO] [stderr]     |                              ^^^^^^^^^^^^^^^ help: try ignoring the field: `chip_proportion: _`
[INFO] [stderr]     |
[INFO] [stderr]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable `x` is assigned to, but never used
[INFO] [stderr]    --> src/module4_logic.rs:316:9
[INFO] [stderr]     |
[INFO] [stderr] 316 |     let x;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = note: consider using `_x` instead
[INFO] [stderr] 
[INFO] [stderr] warning: value assigned to `x` is never read
[INFO] [stderr]    --> src/module4_logic.rs:319:9
[INFO] [stderr]     |
[INFO] [stderr] 319 |         x = 3;
[INFO] [stderr]     |         ^
[INFO] [stderr]     |
[INFO] [stderr]     = help: maybe it is overwritten before being read?
[INFO] [stderr]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `y`
[INFO] [stderr]    --> src/module4_logic.rs:323:9
[INFO] [stderr]     |
[INFO] [stderr] 323 |     let y = {
[INFO] [stderr]     |         ^ help: if this is intentional, prefix it with an underscore: `_y`
[INFO] [stderr] 
[INFO] [stderr] warning: variants `North`, `South`, and `West` are never constructed
[INFO] [stderr]   --> src/module3_types.rs:78:9
[INFO] [stderr]    |
[INFO] [stderr] 77 |     enum CardinalDirection {
[INFO] [stderr]    |          ----------------- variants in this enum
[INFO] [stderr] 78 |         North,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 79 |         East,
[INFO] [stderr] 80 |         South,
[INFO] [stderr]    |         ^^^^^
[INFO] [stderr] 81 |         West,
[INFO] [stderr]    |         ^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `CardinalDirection` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stderr]    = note: `#[warn(dead_code)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variants `Square` and `Circle` are never constructed
[INFO] [stderr]   --> src/module3_types.rs:88:9
[INFO] [stderr]    |
[INFO] [stderr] 87 |     enum Shape {
[INFO] [stderr]    |          ----- variants in this enum
[INFO] [stderr] 88 |         Square {
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] ...
[INFO] [stderr] 95 |         Circle {
[INFO] [stderr]    |         ^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: field `likes_brownies` is never read
[INFO] [stderr]   --> src/module4_logic.rs:17:9
[INFO] [stderr]    |
[INFO] [stderr] 14 |     struct Person {
[INFO] [stderr]    |            ------ field in this struct
[INFO] [stderr] ...
[INFO] [stderr] 17 |         likes_brownies: bool,
[INFO] [stderr]    |         ^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: function `u32_add_alternative` is never used
[INFO] [stderr]    --> src/module4_logic.rs:353:8
[INFO] [stderr]     |
[INFO] [stderr] 353 |     fn u32_add_alternative(a: u32, b: u32) -> u32 {
[INFO] [stderr]     |        ^^^^^^^^^^^^^^^^^^^
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_course` (bin "rust_course" test) generated 10 warnings (run `cargo fix --bin "rust_course" --tests` to apply 1 suggestion)
[INFO] [stderr]     Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/x86_64-unknown-linux-musl/debug/deps/rust_course-b9b3f36b9de52b6e)
[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" "7a542bc87ea950ba6db538cbb81b2457be5dca42867be131582b400aa475f39a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7a542bc87ea950ba6db538cbb81b2457be5dca42867be131582b400aa475f39a", kill_on_drop: false }`
[INFO] [stdout] 7a542bc87ea950ba6db538cbb81b2457be5dca42867be131582b400aa475f39a