[INFO] cloning repository https://github.com/jarrodmedrano/rust-playground
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/jarrodmedrano/rust-playground" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjarrodmedrano%2Frust-playground", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjarrodmedrano%2Frust-playground'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 454d4894d5f5b4841838c88ffb33d1bd57831808
[INFO] checking jarrodmedrano/rust-playground against master#ceab6128fa48a616bfd3e3adf4bc80133b8ee223 for no-never-type-fallback
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjarrodmedrano%2Frust-playground" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/jarrodmedrano/rust-playground on toolchain ceab6128fa48a616bfd3e3adf4bc80133b8ee223
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/jarrodmedrano/rust-playground
[INFO] finished tweaking git repo https://github.com/jarrodmedrano/rust-playground
[INFO] tweaked toml for git repo https://github.com/jarrodmedrano/rust-playground written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/jarrodmedrano/rust-playground 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" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded ethers v2.0.9
[INFO] [stderr]   Downloaded deranged v0.3.8
[INFO] [stderr]   Downloaded time-macros v0.2.14
[INFO] [stderr]   Downloaded url v2.4.1
[INFO] [stderr]   Downloaded svm-rs v0.3.0
[INFO] [stderr]   Downloaded ena v0.14.2
[INFO] [stderr]   Downloaded time v0.3.28
[INFO] [stderr]   Downloaded ethers-etherscan v2.0.9
[INFO] [stderr]   Downloaded ethers-addressbook v2.0.9
[INFO] [stderr]   Downloaded ethers-contract-derive v2.0.9
[INFO] [stderr]   Downloaded ethers-contract v2.0.9
[INFO] [stderr]   Downloaded parity-scale-codec v3.6.5
[INFO] [stderr]   Downloaded ethers-providers v2.0.9
[INFO] [stderr]   Downloaded ethers-contract-abigen v2.0.9
[INFO] [stderr]   Downloaded chrono v0.4.28
[INFO] [stderr]   Downloaded hashers v1.0.1
[INFO] [stderr]   Downloaded lalrpop v0.20.0
[INFO] [stderr]   Downloaded serde-hex v0.1.0
[INFO] [stderr]   Downloaded enr v0.9.0
[INFO] [stderr]   Downloaded coins-bip39 v0.8.7
[INFO] [stderr]   Downloaded ethers-core v2.0.9
[INFO] [stderr]   Downloaded solang-parser v0.3.1
[INFO] [stderr]   Downloaded rlp v0.5.2
[INFO] [stderr]   Downloaded futures-locks v0.7.1
[INFO] [stderr]   Downloaded ethers-middleware v2.0.9
[INFO] [stderr]   Downloaded array-init v0.0.4
[INFO] [stderr]   Downloaded rustls-webpki v0.100.2
[INFO] [stderr]   Downloaded coins-core v0.8.7
[INFO] [stderr]   Downloaded coins-bip32 v0.8.7
[INFO] [stderr]   Downloaded salsa20 v0.10.2
[INFO] [stderr]   Downloaded scrypt v0.10.0
[INFO] [stderr]   Downloaded eth-keystore v0.5.0
[INFO] [stderr]   Downloaded ethers-signers v2.0.9
[INFO] [stderr]   Downloaded cargo_metadata v0.17.0
[INFO] [stderr]   Downloaded const-hex v1.8.0
[INFO] [stderr]   Downloaded ethabi v18.0.0
[INFO] [stderr]   Downloaded auto_impl v1.1.0
[INFO] [stderr]   Downloaded ethbloom v0.13.0
[INFO] [stderr]   Downloaded parity-scale-codec-derive v3.6.5
[INFO] [stderr]   Downloaded ethereum-types v0.14.1
[INFO] [stderr]   Downloaded open-fastrlp-derive v0.1.1
[INFO] [stderr]   Downloaded open-fastrlp v0.1.4
[INFO] [stderr]   Downloaded strum_macros v0.25.2
[INFO] [stderr]   Downloaded path-slash v0.2.1
[INFO] [stderr]   Downloaded lalrpop-util v0.20.0
[INFO] [stderr]   Downloaded pbkdf2 v0.12.2
[INFO] [stderr]   Downloaded h2 v0.3.21
[INFO] [stderr]   Downloaded ethers-solc v2.0.9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a83ec7be937ecf58a1ab5344cfb00ff99e6de17ceeae269ea5ae6c05449584bd
[INFO] running `Command { std: "docker" "start" "-a" "a83ec7be937ecf58a1ab5344cfb00ff99e6de17ceeae269ea5ae6c05449584bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a83ec7be937ecf58a1ab5344cfb00ff99e6de17ceeae269ea5ae6c05449584bd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a83ec7be937ecf58a1ab5344cfb00ff99e6de17ceeae269ea5ae6c05449584bd", kill_on_drop: false }`
[INFO] [stdout] a83ec7be937ecf58a1ab5344cfb00ff99e6de17ceeae269ea5ae6c05449584bd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+ceab6128fa48a616bfd3e3adf4bc80133b8ee223" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8b3b825aae3eba9b54e01adac3b69c4d3398d4c4a97e9db1b46585f18a2d8df5
[INFO] running `Command { std: "docker" "start" "-a" "8b3b825aae3eba9b54e01adac3b69c4d3398d4c4a97e9db1b46585f18a2d8df5", kill_on_drop: false }`
[INFO] [stderr]    Compiling serde v1.0.188
[INFO] [stderr]     Checking zeroize v1.6.0
[INFO] [stderr]     Checking subtle v2.5.0
[INFO] [stderr]    Compiling winnow v0.5.15
[INFO] [stderr]    Compiling generic-array v0.14.7
[INFO] [stderr]    Compiling libc v0.2.147
[INFO] [stderr]     Checking const-oid v0.9.5
[INFO] [stderr]    Compiling crunchy v0.2.2
[INFO] [stderr]    Compiling quote v1.0.33
[INFO] [stderr]    Compiling tiny-keccak v2.0.2
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking rustc-hex v2.1.0
[INFO] [stderr]     Checking byte-slice-cast v1.2.2
[INFO] [stderr]    Compiling rustix v0.38.10
[INFO] [stderr]     Checking der v0.7.8
[INFO] [stderr]    Compiling semver v1.0.18
[INFO] [stderr]    Compiling camino v1.1.6
[INFO] [stderr]     Checking ff v0.13.0
[INFO] [stderr]    Compiling syn v2.0.29
[INFO] [stderr]    Compiling syn v1.0.109
[INFO] [stderr]    Compiling num-traits v0.2.16
[INFO] [stderr]     Checking keccak v0.1.4
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling serde_json v1.0.105
[INFO] [stderr]     Checking base16ct v0.2.0
[INFO] [stderr]     Checking group v0.13.0
[INFO] [stderr]    Compiling futures-task v0.3.28
[INFO] [stderr]     Checking memchr v2.6.2
[INFO] [stderr]    Compiling arrayvec v0.7.4
[INFO] [stderr]     Checking uint v0.9.5
[INFO] [stderr]    Compiling getrandom v0.2.10
[INFO] [stderr]    Compiling cc v1.0.83
[INFO] [stderr]    Compiling crypto-common v0.1.6
[INFO] [stderr]    Compiling block-buffer v0.10.4
[INFO] [stderr]     Checking crypto-bigint v0.5.2
[INFO] [stderr]    Compiling rand_core v0.6.4
[INFO] [stderr]    Compiling digest v0.10.7
[INFO] [stderr]     Checking tracing-core v0.1.31
[INFO] [stderr]     Checking base64 v0.21.3
[INFO] [stderr]     Checking spki v0.7.2
[INFO] [stderr]     Checking sec1 v0.7.3
[INFO] [stderr]     Checking fixed-hash v0.8.0
[INFO] [stderr]     Checking regex-syntax v0.7.5
[INFO] [stderr]    Compiling rand_chacha v0.3.1
[INFO] [stderr]     Checking aho-corasick v1.0.5
[INFO] [stderr]     Checking pkcs8 v0.10.2
[INFO] [stderr]    Compiling futures-channel v0.3.28
[INFO] [stderr]    Compiling wasm-bindgen-shared v0.2.87
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling futures-util v0.3.28
[INFO] [stderr]     Checking hmac v0.12.1
[INFO] [stderr]     Checking sha2 v0.10.7
[INFO] [stderr]     Checking sha3 v0.10.8
[INFO] [stderr]     Checking signature v2.1.0
[INFO] [stderr]     Checking rfc6979 v0.4.0
[INFO] [stderr]    Compiling rustls v0.21.7
[INFO] [stderr]    Compiling bumpalo v3.13.0
[INFO] [stderr]     Checking bitflags v2.4.0
[INFO] [stderr]     Checking elliptic-curve v0.13.5
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking unicode-bidi v0.3.13
[INFO] [stderr]     Checking ecdsa v0.16.8
[INFO] [stderr]     Checking idna v0.4.0
[INFO] [stderr]     Checking chrono v0.4.28
[INFO] [stderr]     Checking inout v0.1.3
[INFO] [stderr]     Checking const-hex v1.8.0
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]     Checking k256 v0.13.1
[INFO] [stderr]    Compiling prettyplease v0.2.12
[INFO] [stderr]    Compiling eyre v0.6.8
[INFO] [stderr]     Checking try-lock v0.2.4
[INFO] [stderr]    Compiling wasm-bindgen v0.2.87
[INFO] [stderr]     Checking regex-automata v0.3.7
[INFO] [stderr]    Compiling cpufeatures v0.2.9
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]     Checking want v0.3.1
[INFO] [stderr]     Checking url v2.4.1
[INFO] [stderr]     Checking cipher v0.4.4
[INFO] [stderr]     Checking socket2 v0.4.9
[INFO] [stderr]    Compiling num-bigint v0.4.4
[INFO] [stderr]    Compiling time-macros v0.2.14
[INFO] [stderr]     Checking tempfile v3.8.0
[INFO] [stderr]     Checking nodrop v0.1.14
[INFO] [stderr]    Compiling async-trait v0.1.73
[INFO] [stderr]     Checking deranged v0.3.8
[INFO] [stderr]    Compiling radium v0.7.0
[INFO] [stderr]    Compiling wasm-bindgen-backend v0.2.87
[INFO] [stderr]     Checking array-init v0.0.4
[INFO] [stderr]     Checking smallvec v0.6.14
[INFO] [stderr]     Checking bs58 v0.5.0
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]     Checking sha1 v0.10.5
[INFO] [stderr]     Checking ripemd v0.1.3
[INFO] [stderr]     Checking rustls-pemfile v1.0.3
[INFO] [stderr]     Checking data-encoding v2.4.0
[INFO] [stderr]     Checking regex v1.9.4
[INFO] [stderr]    Compiling same-file v1.0.6
[INFO] [stderr]    Compiling wasm-bindgen-macro-support v0.2.87
[INFO] [stderr]     Checking webpki-roots v0.25.2
[INFO] [stderr]     Checking bech32 v0.9.1
[INFO] [stderr]     Checking base64 v0.13.1
[INFO] [stderr]    Compiling indenter v0.3.3
[INFO] [stderr]    Compiling unicode-xid v0.2.4
[INFO] [stderr]     Checking ipnet v2.8.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling walkdir v2.3.3
[INFO] [stderr]     Checking wyz v0.5.1
[INFO] [stderr]     Checking pem v1.1.1
[INFO] [stderr]     Checking time v0.3.28
[INFO] [stderr]     Checking salsa20 v0.10.2
[INFO] [stderr]     Checking pbkdf2 v0.11.0
[INFO] [stderr]     Checking send_wrapper v0.4.0
[INFO] [stderr]    Compiling dunce v1.0.4
[INFO] [stderr]     Checking funty v2.0.0
[INFO] [stderr]     Checking Inflector v0.11.4
[INFO] [stderr]     Checking scrypt v0.10.0
[INFO] [stderr]     Checking hashers v1.0.1
[INFO] [stderr]     Checking ctr v0.9.2
[INFO] [stderr]     Checking aes v0.8.3
[INFO] [stderr]     Checking pbkdf2 v0.12.2
[INFO] [stderr]     Checking futures-locks v0.7.1
[INFO] [stderr]     Checking rustls-webpki v0.101.4
[INFO] [stderr]     Checking sct v0.7.0
[INFO] [stderr]     Checking rustls-webpki v0.100.2
[INFO] [stderr]     Checking bitvec v1.0.1
[INFO] [stderr]     Checking webpki-roots v0.23.1
[INFO] [stderr]    Compiling serde_derive v1.0.188
[INFO] [stderr]    Compiling thiserror-impl v1.0.47
[INFO] [stderr]    Compiling strum_macros v0.25.2
[INFO] [stderr]    Compiling tracing-attributes v0.1.26
[INFO] [stderr]    Compiling futures-macro v0.3.28
[INFO] [stderr]    Compiling wasm-bindgen-macro v0.2.87
[INFO] [stderr]    Compiling impl-trait-for-tuples v0.2.2
[INFO] [stderr]    Compiling rlp-derive v0.1.0
[INFO] [stderr]    Compiling derive_more v0.99.17
[INFO] [stderr]    Compiling auto_impl v1.1.0
[INFO] [stderr]    Compiling pin-project-internal v1.1.3
[INFO] [stderr]     Checking js-sys v0.3.64
[INFO] [stderr]     Checking thiserror v1.0.47
[INFO] [stderr]     Checking simple_asn1 v0.6.2
[INFO] [stderr]     Checking pin-project v1.1.3
[INFO] [stderr]     Checking strum v0.25.0
[INFO] [stderr]     Checking tracing v0.1.37
[INFO] [stderr]     Checking tracing-futures v0.2.5
[INFO] [stderr]     Checking gloo-timers v0.2.6
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]     Checking bytes v1.4.0
[INFO] [stderr]     Checking impl-serde v0.4.0
[INFO] [stderr]     Checking cargo-platform v0.1.3
[INFO] [stderr]     Checking serde_spanned v0.6.3
[INFO] [stderr]     Checking toml_datetime v0.6.3
[INFO] [stderr]     Checking serde_urlencoded v0.7.1
[INFO] [stderr]     Checking coins-core v0.8.7
[INFO] [stderr]     Checking serde-hex v0.1.0
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking toml_edit v0.19.14
[INFO] [stderr]     Checking coins-bip32 v0.8.7
[INFO] [stderr]     Checking rlp v0.5.2
[INFO] [stderr]     Checking tokio v1.32.0
[INFO] [stderr]     Checking http v0.2.9
[INFO] [stderr]     Checking impl-rlp v0.3.0
[INFO] [stderr]     Checking coins-bip39 v0.8.7
[INFO] [stderr]    Compiling open-fastrlp-derive v0.1.1
[INFO] [stderr]     Checking cargo_metadata v0.17.0
[INFO] [stderr]     Checking jsonwebtoken v8.3.0
[INFO] [stderr]     Checking eth-keystore v0.5.0
[INFO] [stderr]     Checking http-body v0.4.5
[INFO] [stderr]     Checking tungstenite v0.20.0
[INFO] [stderr]     Checking toml v0.7.6
[INFO] [stderr]     Checking enr v0.9.0
[INFO] [stderr]    Compiling proc-macro-crate v1.3.1
[INFO] [stderr]    Compiling parity-scale-codec-derive v3.6.5
[INFO] [stderr]    Compiling scale-info-derive v2.9.0
[INFO] [stderr]    Compiling num_enum_derive v0.7.0
[INFO] [stderr]     Checking tokio-util v0.7.8
[INFO] [stderr]     Checking tokio-rustls v0.24.1
[INFO] [stderr]     Checking tokio-tungstenite v0.20.0
[INFO] [stderr]     Checking h2 v0.3.21
[INFO] [stderr]     Checking num_enum v0.7.0
[INFO] [stderr]     Checking parity-scale-codec v3.6.5
[INFO] [stderr]     Checking scale-info v2.9.0
[INFO] [stderr]     Checking impl-codec v0.6.0
[INFO] [stderr]     Checking ethbloom v0.13.0
[INFO] [stderr]     Checking primitive-types v0.12.1
[INFO] [stderr]     Checking ethereum-types v0.14.1
[INFO] [stderr]     Checking hyper v0.14.27
[INFO] [stderr]     Checking ethabi v18.0.0
[INFO] [stderr]     Checking open-fastrlp v0.1.4
[INFO] [stderr]     Checking ethers-core v2.0.9
[INFO] [stderr]     Checking hyper-rustls v0.24.1
[INFO] [stderr]     Checking reqwest v0.11.20
[INFO] [stderr]     Checking ethers-contract-abigen v2.0.9
[INFO] [stderr]     Checking ethers-providers v2.0.9
[INFO] [stderr]     Checking ethers-signers v2.0.9
[INFO] [stderr]     Checking ethers-etherscan v2.0.9
[INFO] [stderr]     Checking ethers-addressbook v2.0.9
[INFO] [stderr]    Compiling ethers-contract-derive v2.0.9
[INFO] [stderr]     Checking ethers-contract v2.0.9
[INFO] [stderr]     Checking ethers-middleware v2.0.9
[INFO] [stderr]     Checking ethers v2.0.9
[INFO] [stderr]     Checking playaround v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `super::*`
[INFO] [stdout]   --> src/m4_polymorphism.rs:34:9
[INFO] [stdout]    |
[INFO] [stdout] 34 |     use super::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `CarColour` is never used
[INFO] [stdout]  --> src/m1_enums.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum CarColour {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenResult` is never used
[INFO] [stdout]   --> src/m1_enums.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum GivenResult<T, E> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `create_car_colour` is never used
[INFO] [stdout]   --> src/m1_enums.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn create_car_colour() -> CarColour {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five` is never used
[INFO] [stdout]   --> src/m1_enums.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn check_under_five(num_check: u8) -> GivenResult<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `check_under_five_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn check_under_five_built_in(num_check: u8) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero` is never used
[INFO] [stdout]   --> src/m1_enums.rs:37:4
[INFO] [stdout]    |
[INFO] [stdout] 37 | fn remainder_zero(num_check: f32) -> GivenOption<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn remainder_zero_built_in(num_check: f32) -> Option<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `GivenOption` is never used
[INFO] [stdout]   --> src/m1_enums.rs:56:6
[INFO] [stdout]    |
[INFO] [stdout] 56 | enum GivenOption<T> {
[INFO] [stdout]    |      ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]  --> src/m2_structs.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `increment_sign_in_count`, `change_username`, and `change_email` are never used
[INFO] [stdout]   --> src/m2_structs.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 10 |     fn increment_sign_in_count(&mut self) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn change_username(&mut self, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 16 |     fn change_email(&mut self, new_email: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `change_username` is never used
[INFO] [stdout]   --> src/m2_structs.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn change_username(user: &mut User, new_username: &str) {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Attacker` is never used
[INFO] [stdout]  --> src/m3_traits.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Attacker {
[INFO] [stdout]   |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Character` is never used
[INFO] [stdout]  --> src/m3_traits.rs:7:6
[INFO] [stdout]   |
[INFO] [stdout] 7 | enum Character {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `EthereumAddress` is never used
[INFO] [stdout]  --> src/m4_polymorphism.rs:4:7
[INFO] [stdout]   |
[INFO] [stdout] 4 | trait EthereumAddress {
[INFO] [stdout]   |       ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_ethereum_data` is never used
[INFO] [stdout]   --> src/m4_polymorphism.rs:27:4
[INFO] [stdout]    |
[INFO] [stdout] 27 | fn get_ethereum_data<T: EthereumAddress>(address: T) -> Address {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Green`, `Blue`, and `Silver` are never constructed
[INFO] [stdout]  --> src/m1_enums.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum CarColour {
[INFO] [stdout]   |      --------- variants in this enum
[INFO] [stdout] 3 |     Red,
[INFO] [stdout] 4 |     Green,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 5 |     Blue,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout] 6 |     Silver,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `CarColour` 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: function `check_under_five_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn check_under_five_built_in(num_check: u8) -> Result<String, String> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `remainder_zero_built_in` is never used
[INFO] [stdout]   --> src/m1_enums.rs:46:4
[INFO] [stdout]    |
[INFO] [stdout] 46 | fn remainder_zero_built_in(num_check: f32) -> Option<f32> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `active` is never read
[INFO] [stdout]  --> src/m2_structs.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 6 |     active: bool,
[INFO] [stdout]   |     ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `change_username` is never used
[INFO] [stdout]   --> src/m2_structs.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl User {
[INFO] [stdout]    | --------- method in this implementation
[INFO] [stdout] ...
[INFO] [stdout] 13 |     fn change_username(&mut self, new_username: &str) {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `choose_weapon` is never used
[INFO] [stdout]  --> src/m3_traits.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | trait Attacker {
[INFO] [stdout]   |       -------- method in this trait
[INFO] [stdout] 2 |     fn choose_style(&self) -> String;
[INFO] [stdout] 3 |     fn choose_weapon(&self) -> String;
[INFO] [stdout]   |        ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Warrior` and `Wizard` are never constructed
[INFO] [stdout]   --> src/m3_traits.rs:8:5
[INFO] [stdout]    |
[INFO] [stdout] 7  | enum Character {
[INFO] [stdout]    |      --------- variants in this enum
[INFO] [stdout] 8  |     Warrior,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 9  |     Archer,
[INFO] [stdout] 10 |     Wizard,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Character` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 16 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 56.98s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: wasm-bindgen v0.2.87
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 2`
[INFO] running `Command { std: "docker" "inspect" "8b3b825aae3eba9b54e01adac3b69c4d3398d4c4a97e9db1b46585f18a2d8df5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8b3b825aae3eba9b54e01adac3b69c4d3398d4c4a97e9db1b46585f18a2d8df5", kill_on_drop: false }`
[INFO] [stdout] 8b3b825aae3eba9b54e01adac3b69c4d3398d4c4a97e9db1b46585f18a2d8df5