[INFO] cloning repository https://github.com/sdobz/rust-follow-along
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sdobz/rust-follow-along" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdobz%2Frust-follow-along", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdobz%2Frust-follow-along'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 15471338aa916f44df49638cd48fa6ff21536e5e
[INFO] fixing sdobz/rust-follow-along against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=end=2015,2024 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdobz%2Frust-follow-along" "/workspace/builds/worker-6-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/sdobz/rust-follow-along
[INFO] finished tweaking git repo https://github.com/sdobz/rust-follow-along
[INFO] tweaked toml for git repo https://github.com/sdobz/rust-follow-along written to /workspace/builds/worker-6-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/sdobz/rust-follow-along 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/sdobz/rust-follow-along 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] warning: ch19_advancedfeatures/Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `ch19_advacedfeatures` (manifest) generated 1 warning
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc2/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] ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c
[INFO] running `Command { std: "docker" "start" "ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c", 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" "ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c", 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" "ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=end=2015,2024", kill_on_drop: false }`
[INFO] [stderr] crater-edition-check: migrating to next edition
[INFO] [stderr]    Migrating ch01_getting_started/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch02_guessing_game/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03a_variables/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03b_functions/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03c_branches/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch04a_ownership/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch04b_slices/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch05_structs/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch06_enums/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch07_modules/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch08_collections/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch09_errors/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch10_generics/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch11_tests/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch12_minigrep/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch13a_functional/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch13b_minigrep2/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch14a_adder/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch14b_add_one/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch15_smartpointers/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch16_concurrency/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch17_objectoriented/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch18_patterns/Cargo.toml from 2015 edition to 2018
[INFO] [stderr]    Migrating ch19_advancedfeatures/Cargo.toml from 2015 edition to 2018
[INFO] [stderr]    Migrating ch20_webserver/Cargo.toml from 2018 edition to 2021
[INFO] [stderr] warning: ch19_advancedfeatures/Cargo.toml: `package.edition` is unspecified, defaulting to `2015` while the latest is `2024`
[INFO] [stderr] warning: `ch19_advacedfeatures` (manifest) generated 1 warning
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking ch07_modules v0.1.0 (/opt/rustwide/workdir/ch07_modules)
[INFO] [stderr]     Checking ch12_minigrep v0.1.0 (/opt/rustwide/workdir/ch12_minigrep)
[INFO] [stderr]     Checking ch17_objectoriented v0.1.0 (/opt/rustwide/workdir/ch17_objectoriented)
[INFO] [stderr]     Checking ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2)
[INFO] [stderr]     Checking ch20_webserver v0.1.0 (/opt/rustwide/workdir/ch20_webserver)
[INFO] [stderr]     Checking ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests)
[INFO] [stderr]     Checking ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics)
[INFO] [stderr]     Checking ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers)
[INFO] [stderr]     Checking ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums)
[INFO] [stderr]     Checking ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started)
[INFO] [stderr]     Checking ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches)
[INFO] [stderr]     Checking ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors)
[INFO] [stderr]    Migrating ch12_minigrep/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch20_webserver/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch07_modules/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch11_tests/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch17_objectoriented/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]    Migrating ch01_getting_started/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch13b_minigrep2/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch10_generics/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch06_enums/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch15_smartpointers/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch09_errors/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables)
[INFO] [stderr]     Checking ch13a_functional v0.1.0 (/opt/rustwide/workdir/ch13a_functional)
[INFO] [stderr]    Migrating ch03c_branches/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking rand v0.3.22
[INFO] [stderr]     Checking ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one)
[INFO] [stderr]     Checking ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game)
[INFO] [stderr]    Migrating ch12_minigrep/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch20_webserver/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch07_modules/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch11_tests/tests/integration_test.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership)
[INFO] [stderr]    Migrating ch17_objectoriented/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch16_concurrency v0.1.0 (/opt/rustwide/workdir/ch16_concurrency)
[INFO] [stderr]     Checking ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions)
[INFO] [stderr]    Migrating ch13b_minigrep2/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03a_variables/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch13a_functional/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch02_guessing_game/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures)
[INFO] [stderr]    Migrating ch14b_add_one/src/lib.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder)
[INFO] [stderr]    Migrating ch04a_ownership/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections)
[INFO] [stderr]    Migrating ch16_concurrency/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03b_functions/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Checking ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns)
[INFO] [stderr]     Checking ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices)
[INFO] [stderr]     Checking ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs)
[INFO] [stderr]    Migrating ch19_advancedfeatures/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating ch14a_adder/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch08_collections/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch18_patterns/src/main.rs from 2015 edition to 2018
[INFO] [stderr]    Migrating ch04b_slices/src/main.rs from 2018 edition to 2021
[INFO] [stderr]    Migrating ch05_structs/src/main.rs from 2018 edition to 2021
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 6.60s
[INFO] [stderr] crater-edition-check: ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch07_modules v0.1.0 (/opt/rustwide/workdir/ch07_modules) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch12_minigrep v0.1.0 (/opt/rustwide/workdir/ch12_minigrep) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch13a_functional v0.1.0 (/opt/rustwide/workdir/ch13a_functional) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch16_concurrency v0.1.0 (/opt/rustwide/workdir/ch16_concurrency) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch17_objectoriented v0.1.0 (/opt/rustwide/workdir/ch17_objectoriented) updating edition from 2018 to 2021
[INFO] [stderr] crater-edition-check: ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns) updating edition from 2015 to 2018
[INFO] [stderr] crater-edition-check: ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures) updating edition from 2015 to 2018
[INFO] [stderr] crater-edition-check: ch20_webserver v0.1.0 (/opt/rustwide/workdir/ch20_webserver) updating edition from 2018 to 2021
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2021 which implies `resolver = "2"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Checking ch07_modules v0.1.0 (/opt/rustwide/workdir/ch07_modules)
[INFO] [stderr]     Checking ch20_webserver v0.1.0 (/opt/rustwide/workdir/ch20_webserver)
[INFO] [stderr]     Checking ch12_minigrep v0.1.0 (/opt/rustwide/workdir/ch12_minigrep)
[INFO] [stderr]     Checking ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2)
[INFO] [stderr]     Checking ch17_objectoriented v0.1.0 (/opt/rustwide/workdir/ch17_objectoriented)
[INFO] [stderr]     Checking ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests)
[INFO] [stderr]     Checking ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices)
[INFO] [stderr]     Checking ch13a_functional v0.1.0 (/opt/rustwide/workdir/ch13a_functional)
[INFO] [stderr]     Checking ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures)
[INFO] [stderr]     Checking ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions)
[INFO] [stderr]     Checking ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums)
[INFO] [stderr]     Checking ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors)
[INFO] [stderr]     Checking ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables)
[INFO] [stderr]     Checking ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one)
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum UsState {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 29 |     Alabama,
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'c, 's> Parser<'c, 's> {
[INFO] [stdout]   | --------------------------- method in this implementation
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_context` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `diameter` is never read
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Ball<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StrWrap` is never constructed
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct StrWrap<'a>(&'a str);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo_anon_lifetime` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo_anon_lifetime(string: &str) -> StrWrap<'_> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder)
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct SelectBox {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout]  9 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Shoe {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 38 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct SelectBox {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout]  9 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game)
[INFO] [stderr]     Checking ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns)
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership)
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> ch18_patterns/src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         'a' ... 'j' => println!("Early ASCII letter"),
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'c, 's> Parser<'c, 's> {
[INFO] [stdout]   | --------------------------- method in this implementation
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_context` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `diameter` is never read
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Ball<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StrWrap` is never constructed
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct StrWrap<'a>(&'a str);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo_anon_lifetime` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo_anon_lifetime(string: &str) -> StrWrap<'_> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> ch18_patterns/src/main.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         'k' ... 'z' => println!("Late ASCII letter"),
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> ch18_patterns/src/main.rs:221:50
[INFO] [stdout]     |
[INFO] [stdout] 221 |         HelloMessage::Hello { id: id_variable @ 3...7 } => {
[INFO] [stdout]     |                                                  ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> ch18_patterns/src/main.rs:225:37
[INFO] [stdout]     |
[INFO] [stdout] 225 |         HelloMessage::Hello { id: 10...12 } => {
[INFO] [stdout]     |                                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics)
[INFO] [stderr]     Checking ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers)
[INFO] [stdout] warning: value assigned to `setting_value` is never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 148 |             setting_value = new_setting_value;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs)
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | struct Point3D {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 256 |     x: i32,
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches)
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> ch18_patterns/src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         'a' ... 'j' => println!("Early ASCII letter"),
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` (part of `#[warn(rust_2021_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]   --> ch18_patterns/src/main.rs:70:13
[INFO] [stdout]    |
[INFO] [stdout] 70 |         'k' ... 'z' => println!("Late ASCII letter"),
[INFO] [stdout]    |             ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> ch18_patterns/src/main.rs:221:50
[INFO] [stdout]     |
[INFO] [stdout] 221 |         HelloMessage::Hello { id: id_variable @ 3...7 } => {
[INFO] [stdout]     |                                                  ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: `...` range patterns are deprecated
[INFO] [stdout]    --> ch18_patterns/src/main.rs:225:37
[INFO] [stdout]     |
[INFO] [stdout] 225 |         HelloMessage::Hello { id: 10...12 } => {
[INFO] [stdout]     |                                     ^^^ help: use `..=` for an inclusive range
[INFO] [stdout]     |
[INFO] [stdout]     = warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
[INFO] [stdout]     = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2021/warnings-promoted-to-error.html>
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch16_concurrency v0.1.0 (/opt/rustwide/workdir/ch16_concurrency)
[INFO] [stderr]     Checking ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections)
[INFO] [stdout] warning: value assigned to `setting_value` is never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 148 |             setting_value = new_setting_value;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | struct Point3D {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 256 |     x: i32,
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started)
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 51 |     pub username: String,
[INFO] [stdout] 52 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 53 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 54 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RcRefCellList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 45 -     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout] 45 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TailList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout] 51 +     Cons((), RefCell<Rc<TailList>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/refcount.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Cons(i32, Rc<RcList>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RcList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Cons(i32, Rc<RcList>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/weakrc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum UsState {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 29 |     Alabama,
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 51 |     pub username: String,
[INFO] [stdout] 52 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 53 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 54 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Messenger` is never used
[INFO] [stdout]  --> ch15_smartpointers/src/refcell.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Messenger {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitTracker` is never constructed
[INFO] [stdout]  --> ch15_smartpointers/src/refcell.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct LimitTracker<'a, T: 'a + Messenger> {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `set_value` are never used
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stdout] 12 | | where
[INFO] [stdout] 13 | |     T: Messenger,
[INFO] [stdout]    | |_________________- associated items in this implementation
[INFO] [stdout] 14 |   {
[INFO] [stdout] 15 |       pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RcRefCellList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 45 -     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout] 45 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TailList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout] 51 +     Cons((), RefCell<Rc<TailList>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/refcount.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Cons(i32, Rc<RcList>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RcList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Cons(i32, Rc<RcList>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/weakrc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 8.10s
[INFO] [stderr] crater-edition-check: migrating to next edition
[INFO] [stderr]    Migrating ch01_getting_started/Cargo.toml from 2018 edition to 2021
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[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2021 resolver, specify `workspace.resolver = "2"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
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[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2024 which implies `resolver = "3"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2024 resolver, specify `workspace.resolver = "3"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
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[INFO] [stderr]     Checking ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics)
[INFO] [stderr]     Checking ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns)
[INFO] [stderr]     Checking ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors)
[INFO] [stderr]     Checking ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one)
[INFO] [stderr]     Checking ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game)
[INFO] [stderr]     Checking ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder)
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Shoe {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 38 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct SelectBox {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout]  9 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices)
[INFO] [stderr]     Checking ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures)
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct SelectBox {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout]  9 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs)
[INFO] [stderr]     Checking ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions)
[INFO] [stderr]     Checking ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches)
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 51 |     pub username: String,
[INFO] [stdout] 52 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 53 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 54 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers)
[INFO] [stdout] warning: value assigned to `setting_value` is never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 148 |             setting_value = new_setting_value;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | struct Point3D {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 256 |     x: i32,
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'c, 's> Parser<'c, 's> {
[INFO] [stdout]   | --------------------------- method in this implementation
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_context` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `diameter` is never read
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Ball<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StrWrap` is never constructed
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct StrWrap<'a>(&'a str);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo_anon_lifetime` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo_anon_lifetime(string: &str) -> StrWrap<'_> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables)
[INFO] [stderr]     Checking ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started)
[INFO] [stdout] warning: value assigned to `setting_value` is never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 148 |             setting_value = new_setting_value;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | struct Point3D {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 256 |     x: i32,
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums)
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 51 |     pub username: String,
[INFO] [stdout] 52 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 53 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 54 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections)
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RcRefCellList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 45 -     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout] 45 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TailList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout] 51 +     Cons((), RefCell<Rc<TailList>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/refcount.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Cons(i32, Rc<RcList>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RcList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Cons(i32, Rc<RcList>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/weakrc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Messenger` is never used
[INFO] [stdout]  --> ch15_smartpointers/src/refcell.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Messenger {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitTracker` is never constructed
[INFO] [stdout]  --> ch15_smartpointers/src/refcell.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct LimitTracker<'a, T: 'a + Messenger> {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `set_value` are never used
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stdout] 12 | | where
[INFO] [stdout] 13 | |     T: Messenger,
[INFO] [stdout]    | |_________________- associated items in this implementation
[INFO] [stdout] 14 |   {
[INFO] [stdout] 15 |       pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RcRefCellList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 45 -     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout] 45 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TailList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout] 51 +     Cons((), RefCell<Rc<TailList>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/refcount.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Cons(i32, Rc<RcList>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RcList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Cons(i32, Rc<RcList>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/weakrc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum UsState {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 29 |     Alabama,
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum UsState {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 29 |     Alabama,
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'c, 's> Parser<'c, 's> {
[INFO] [stdout]   | --------------------------- method in this implementation
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_context` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `diameter` is never read
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Ball<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StrWrap` is never constructed
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct StrWrap<'a>(&'a str);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo_anon_lifetime` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo_anon_lifetime(string: &str) -> StrWrap<'_> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[warn(static_mut_refs)]` (part of `#[warn(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 16.60s
[INFO] [stderr] crater-edition-check: migrating to next edition
[INFO] [stderr]    Migrating ch01_getting_started/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch02_guessing_game/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03a_variables/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03b_functions/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch03c_branches/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch04a_ownership/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch04b_slices/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch05_structs/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch06_enums/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch07_modules/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch08_collections/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch09_errors/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch10_generics/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch11_tests/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch12_minigrep/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch13a_functional/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch13b_minigrep2/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch14a_adder/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch14b_add_one/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch15_smartpointers/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch16_concurrency/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch17_objectoriented/Cargo.toml from 2018 edition to 2021
[INFO] [stderr]    Migrating ch18_patterns/Cargo.toml from 2015 edition to 2018
[INFO] [stderr]    Migrating ch19_advancedfeatures/Cargo.toml from 2015 edition to 2018
[INFO] [stderr]    Migrating ch20_webserver/Cargo.toml from 2018 edition to 2021
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2024 which implies `resolver = "3"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2024 resolver, specify `workspace.resolver = "3"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Checking ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2)
[INFO] [stderr]     Checking ch12_minigrep v0.1.0 (/opt/rustwide/workdir/ch12_minigrep)
[INFO] [stderr]     Checking ch20_webserver v0.1.0 (/opt/rustwide/workdir/ch20_webserver)
[INFO] [stderr]     Checking ch07_modules v0.1.0 (/opt/rustwide/workdir/ch07_modules)
[INFO] [stderr]     Checking ch17_objectoriented v0.1.0 (/opt/rustwide/workdir/ch17_objectoriented)
[INFO] [stderr]     Checking ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests)
[INFO] [stderr]     Checking ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs)
[INFO] [stderr]     Checking ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers)
[INFO] [stderr]     Checking ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics)
[INFO] [stderr]     Checking ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums)
[INFO] [stderr]     Checking ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors)
[INFO] [stderr]     Checking ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns)
[INFO] [stderr]     Checking ch13a_functional v0.1.0 (/opt/rustwide/workdir/ch13a_functional)
[INFO] [stderr]     Checking ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder)
[INFO] [stderr] warning: `ch07_modules/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] 
[INFO] [stderr] If you are trying to migrate from the previous edition (2021), the
[INFO] [stderr] process requires following these steps:
[INFO] [stderr] 
[INFO] [stderr] 1. Start with `edition = "2021"` in `Cargo.toml`
[INFO] [stderr] 2. Run `cargo fix --edition`
[INFO] [stderr] 3. Modify `Cargo.toml` to set `edition = "2024"`
[INFO] [stderr] 4. Run `cargo build` or `cargo test` to verify the fixes worked
[INFO] [stderr] 
[INFO] [stderr] More details may be found at
[INFO] [stderr] https://doc.rust-lang.org/edition-guide/editions/transitioning-an-existing-project-to-a-new-edition.html
[INFO] [stderr] 
[INFO] [stderr] warning: `ch15_smartpointers/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch12_minigrep/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch17_objectoriented/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch13a_functional/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch09_errors/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch14a_adder/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch10_generics/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one)
[INFO] [stderr]    Migrating ch18_patterns/src/main.rs from 2021 edition to 2024
[INFO] [stderr] warning: `ch13b_minigrep2/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game)
[INFO] [stderr] warning: `ch11_tests/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices)
[INFO] [stderr] warning: `ch20_webserver/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch06_enums/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch05_structs/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch07_modules/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch12_minigrep/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables)
[INFO] [stderr] warning: `ch17_objectoriented/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch16_concurrency v0.1.0 (/opt/rustwide/workdir/ch16_concurrency)
[INFO] [stderr]     Checking ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches)
[INFO] [stderr] warning: `ch14b_add_one/src/lib.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch02_guessing_game/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership)
[INFO] [stderr]     Checking ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started)
[INFO] [stderr] warning: `ch04b_slices/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch11_tests/tests/integration_test.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch13b_minigrep2/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch20_webserver/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch03a_variables/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures)
[INFO] [stderr] warning: `ch16_concurrency/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections)
[INFO] [stderr] warning: `ch03c_branches/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr] warning: `ch04a_ownership/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]     Checking ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions)
[INFO] [stderr] warning: `ch01_getting_started/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]    Migrating ch19_advancedfeatures/src/main.rs from 2021 edition to 2024
[INFO] [stderr] warning: `ch08_collections/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stderr]        Fixed ch19_advancedfeatures/src/unsafe_demo.rs (1 fix)
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `--force-warn static-mut-refs` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] warning: `ch03b_functions/src/main.rs` is already on the latest edition (2024), unable to migrate further
[INFO] [stdout] warning: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `--force-warn static-mut-refs` implied by `--force-warn rust-2024-compatibility`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 24.00s
[INFO] [stderr] crater-edition-check: ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch07_modules v0.1.0 (/opt/rustwide/workdir/ch07_modules) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch12_minigrep v0.1.0 (/opt/rustwide/workdir/ch12_minigrep) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch13a_functional v0.1.0 (/opt/rustwide/workdir/ch13a_functional) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch16_concurrency v0.1.0 (/opt/rustwide/workdir/ch16_concurrency) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch17_objectoriented v0.1.0 (/opt/rustwide/workdir/ch17_objectoriented) updating edition from 2024 to 2024
[INFO] [stderr] crater-edition-check: ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns) updating edition from 2021 to 2024
[INFO] [stderr] crater-edition-check: ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures) updating edition from 2021 to 2024
[INFO] [stderr] crater-edition-check: ch20_webserver v0.1.0 (/opt/rustwide/workdir/ch20_webserver) updating edition from 2024 to 2024
[INFO] [stderr] warning: virtual workspace defaulting to `resolver = "1"` despite one or more workspace members being on edition 2024 which implies `resolver = "3"`
[INFO] [stderr]   |
[INFO] [stderr]   = note: to keep the current resolver, specify `workspace.resolver = "1"` in the workspace root's manifest
[INFO] [stderr]   = note: to use the edition 2024 resolver, specify `workspace.resolver = "3"` in the workspace root's manifest
[INFO] [stderr]   = note: for more details see https://doc.rust-lang.org/cargo/reference/resolver.html#resolver-versions
[INFO] [stderr]     Checking ch17_objectoriented v0.1.0 (/opt/rustwide/workdir/ch17_objectoriented)
[INFO] [stderr]     Checking ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2)
[INFO] [stderr]     Checking ch12_minigrep v0.1.0 (/opt/rustwide/workdir/ch12_minigrep)
[INFO] [stderr]     Checking ch07_modules v0.1.0 (/opt/rustwide/workdir/ch07_modules)
[INFO] [stderr]     Checking ch20_webserver v0.1.0 (/opt/rustwide/workdir/ch20_webserver)
[INFO] [stderr]     Checking ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests)
[INFO] [stderr]     Checking ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership)
[INFO] [stderr]     Checking ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections)
[INFO] [stderr]     Checking ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures)
[INFO] [stderr]     Checking ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics)
[INFO] [stderr]     Checking ch13a_functional v0.1.0 (/opt/rustwide/workdir/ch13a_functional)
[INFO] [stderr]     Checking ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices)
[INFO] [stderr]     Checking ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums)
[INFO] [stderr]     Checking ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder)
[INFO] [stdout] warning: variant `Alaska` is never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 28 | enum UsState {
[INFO] [stdout]    |      ------- variant in this enum
[INFO] [stdout] 29 |     Alabama,
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `UsState` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Penny`, `Nickel`, and `Dime` are never constructed
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 34 | enum Coin {
[INFO] [stdout]    |      ---- variants in this enum
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Coin` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `value` is never read
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct Guess {
[INFO] [stdout]    |            ----- field in this struct
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game)
[INFO] [stdout] warning: struct `Shoe` is never constructed
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct Shoe {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:33:8
[INFO] [stdout]    |
[INFO] [stdout] 33 | struct Counter {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | impl Counter {
[INFO] [stdout]    | ------------ associated function in this implementation
[INFO] [stdout] 38 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one)
[INFO] [stderr]     Checking ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers)
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct SelectBox {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout]  9 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch03a_variables v0.1.0 (/opt/rustwide/workdir/ch03a_variables)
[INFO] [stderr]     Checking ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions)
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'c, 's> Parser<'c, 's> {
[INFO] [stdout]   | --------------------------- method in this implementation
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_context` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `diameter` is never read
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Ball<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StrWrap` is never constructed
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct StrWrap<'a>(&'a str);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo_anon_lifetime` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo_anon_lifetime(string: &str) -> StrWrap<'_> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[deny(static_mut_refs)]` (part of `#[deny(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant `MAX_POINTS` is never used
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:7
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   |       ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns)
[INFO] [stderr]     Checking ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs)
[INFO] [stderr] error: could not compile `ch19_advacedfeatures` (bin "ch19_advacedfeatures") due to 1 previous error; 9 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 51 |     pub username: String,
[INFO] [stdout] 52 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 53 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 54 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `width` and `height` are never read
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  8 | struct SelectBox {
[INFO] [stdout]    |        --------- fields in this struct
[INFO] [stdout]  9 |     width: u32,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Messenger` is never used
[INFO] [stdout]  --> ch15_smartpointers/src/refcell.rs:1:11
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub trait Messenger {
[INFO] [stdout]   |           ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `LimitTracker` is never constructed
[INFO] [stdout]  --> ch15_smartpointers/src/refcell.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 | pub struct LimitTracker<'a, T: 'a + Messenger> {
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `set_value` are never used
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 11 | / impl<'a, T> LimitTracker<'a, T>
[INFO] [stdout] 12 | | where
[INFO] [stdout] 13 | |     T: Messenger,
[INFO] [stdout]    | |_________________- associated items in this implementation
[INFO] [stdout] 14 |   {
[INFO] [stdout] 15 |       pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |              ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |       pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |              ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:45:10
[INFO] [stdout]    |
[INFO] [stdout] 45 |     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout]    |     ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `RcRefCellList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]    |
[INFO] [stdout] 45 -     Cons(Rc<RefCell<i32>>, Rc<RcRefCellList>),
[INFO] [stdout] 45 +     Cons((), ()),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:51:10
[INFO] [stdout]    |
[INFO] [stdout] 51 |     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout]    |     ---- ^^^
[INFO] [stdout]    |     |
[INFO] [stdout]    |     field in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `TailList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]    |
[INFO] [stdout] 51 -     Cons(i32, RefCell<Rc<TailList>>),
[INFO] [stdout] 51 +     Cons((), RefCell<Rc<TailList>>),
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/refcount.rs:5:10
[INFO] [stdout]   |
[INFO] [stdout] 5 |     Cons(i32, Rc<RcList>),
[INFO] [stdout]   |     ---- ^^^  ^^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[INFO] [stdout]   |
[INFO] [stdout]   = note: `RcList` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] help: consider changing the fields to be of unit type to suppress this warning while preserving the field numbering, or remove the fields
[INFO] [stdout]   |
[INFO] [stdout] 5 -     Cons(i32, Rc<RcList>),
[INFO] [stdout] 5 +     Cons((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `children` are never read
[INFO] [stdout]  --> ch15_smartpointers/src/weakrc.rs:6:5
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 6 |     value: i32,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 7 |     parent: RefCell<Weak<Node>>,
[INFO] [stdout] 8 |     children: RefCell<Vec<Rc<Node>>>,
[INFO] [stdout]   |     ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Node` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:27
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |                           ^^                 ^^^^^^^^^^^^^^^ the same lifetime is hidden here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is elided here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<'_, T> {
[INFO] [stdout]    |                                                           +++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:37:9
[INFO] [stdout]    |
[INFO] [stdout] 33 | pub struct NewsArticle {
[INFO] [stdout]    |            ----------- field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 37 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `content`, `reply`, and `retweet` are never read
[INFO] [stdout]   --> ch10_generics/src/traits.rs:52:9
[INFO] [stdout]    |
[INFO] [stdout] 50 | pub struct Tweet {
[INFO] [stdout]    |            ----- fields in this struct
[INFO] [stdout] 51 |     pub username: String,
[INFO] [stdout] 52 |     pub content: String,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 53 |     pub reply: bool,
[INFO] [stdout]    |         ^^^^^
[INFO] [stdout] 54 |     pub retweet: bool,
[INFO] [stdout]    |         ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `setting_value` is never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:148:13
[INFO] [stdout]     |
[INFO] [stdout] 148 |             setting_value = new_setting_value;
[INFO] [stdout]     |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout]     = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `y` and `z` are never read
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 255 | struct Point3D {
[INFO] [stdout]     |        ------- fields in this struct
[INFO] [stdout] 256 |     x: i32,
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Quit`, `Move`, and `Write` are never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 261 | enum Message {
[INFO] [stdout]     |      ------- variants in this enum
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Rgb` is never constructed
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 268 | enum Color {
[INFO] [stdout]     |      ----- variant in this enum
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Context` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Context<'s>(&'s str);
[INFO] [stdout]   |        ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Parser` is never constructed
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Parser<'c, 's: 'c> {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `parse` is never used
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | impl<'c, 's> Parser<'c, 's> {
[INFO] [stdout]   | --------------------------- method in this implementation
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `parse_context` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:4
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `diameter` is never read
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 20 | struct Ball<'a> {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StrWrap` is never constructed
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | struct StrWrap<'a>(&'a str);
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:34:4
[INFO] [stdout]    |
[INFO] [stdout] 34 | fn foo<'a>(string: &'a str) -> StrWrap<'a> {
[INFO] [stdout]    |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `foo_anon_lifetime` is never used
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:38:4
[INFO] [stdout]    |
[INFO] [stdout] 38 | fn foo_anon_lifetime(string: &str) -> StrWrap<'_> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: hiding a lifetime that's elided elsewhere is confusing
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:14:27
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context) -> Result<(), &str> {
[INFO] [stdout]    |                           ^^^^^^^                ^^^^ the same lifetime is elided here
[INFO] [stdout]    |                           |
[INFO] [stdout]    |                           the lifetime is hidden here
[INFO] [stdout]    |
[INFO] [stdout]    = help: the same lifetime is referred to in inconsistent ways, making the signature confusing
[INFO] [stdout]    = note: `#[warn(mismatched_lifetime_syntaxes)]` on by default
[INFO] [stdout] help: use `'_` for type paths
[INFO] [stdout]    |
[INFO] [stdout] 14 | fn parse_context(context: Context<'_>) -> Result<(), &str> {
[INFO] [stdout]    |                                  ++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: creating a shared reference to mutable static
[INFO] [stdout]   --> ch19_advancedfeatures/src/unsafe_demo.rs:41:40
[INFO] [stdout]    |
[INFO] [stdout] 41 |         println!("Counter is now: {}", COUNTER);
[INFO] [stdout]    |                                        ^^^^^^^ shared reference to mutable static
[INFO] [stdout]    |
[INFO] [stdout]    = note: shared references to mutable statics are dangerous; it's undefined behavior if the static is mutated or if a mutable reference is created for it while the shared reference lives
[INFO] [stdout]    = note: for more information, see <https://doc.rust-lang.org/edition-guide/rust-2024/static-mut-references.html>
[INFO] [stdout]    = note: `#[deny(static_mut_refs)]` (part of `#[deny(rust_2024_compatibility)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `ch19_advacedfeatures` (bin "ch19_advacedfeatures" test) due to 1 previous error; 9 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c", kill_on_drop: false }`
[INFO] [stdout] ce7c236b9d4baa88c6aabc1c061cc94f806ed384531c65d63d9b3ad18e56950c
