[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] checking sdobz/rust-follow-along against try#8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8 for pr-82565
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsdobz%2Frust-follow-along" "/workspace/builds/worker-13/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-13/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/sdobz/rust-follow-along on toolchain 8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[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-13/source/Cargo.toml
[INFO] crate git repo https://github.com/sdobz/rust-follow-along already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] be3b99a7291e0a9ddec29f1ea2f102edbb1c6ef856606b5590326c324d3c75da
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "be3b99a7291e0a9ddec29f1ea2f102edbb1c6ef856606b5590326c324d3c75da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "be3b99a7291e0a9ddec29f1ea2f102edbb1c6ef856606b5590326c324d3c75da", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "be3b99a7291e0a9ddec29f1ea2f102edbb1c6ef856606b5590326c324d3c75da", kill_on_drop: false }`
[INFO] [stdout] be3b99a7291e0a9ddec29f1ea2f102edbb1c6ef856606b5590326c324d3c75da
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-13/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "rustops/crates-build-env@sha256:f2f6bcd4b43ebee4e173f653a26493129bdb64017c85f916b780ca7fbdbaa79d" "/opt/rustwide/cargo-home/bin/cargo" "+8e3afc79c11f48cb3acd1be5b3b7de98fe3f93a8" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3a86760f50bd0787cd0b9e67653adfb65bd87fa0c048ffc0e46dc18fb12fdd8b
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "3a86760f50bd0787cd0b9e67653adfb65bd87fa0c048ffc0e46dc18fb12fdd8b", kill_on_drop: false }`
[INFO] [stderr]     Checking ch13b_minigrep2 v0.1.0 (/opt/rustwide/workdir/ch13b_minigrep2)
[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 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 ch11_tests v0.1.0 (/opt/rustwide/workdir/ch11_tests)
[INFO] [stderr]     Checking ch06_enums v0.1.0 (/opt/rustwide/workdir/ch06_enums)
[INFO] [stderr]     Checking ch19_advacedfeatures v0.1.0 (/opt/rustwide/workdir/ch19_advancedfeatures)
[INFO] [stderr]     Checking ch18_patterns v0.1.0 (/opt/rustwide/workdir/ch18_patterns)
[INFO] [stderr]     Checking ch10_generics v0.1.0 (/opt/rustwide/workdir/ch10_generics)
[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]     Checking ch01_getting_started v0.1.0 (/opt/rustwide/workdir/ch01_getting_started)
[INFO] [stderr]     Checking ch09_errors v0.1.0 (/opt/rustwide/workdir/ch09_errors)
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` 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]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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] 
[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] 
[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] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch04a_ownership v0.1.0 (/opt/rustwide/workdir/ch04a_ownership)
[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]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[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]    = note: `#[warn(ellipsis_inclusive_range_patterns)]` 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] 
[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] 
[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] 
[INFO] [stderr]     Checking ch16_concurrency v0.1.0 (/opt/rustwide/workdir/ch16_concurrency)
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]   --> ch06_enums/src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]   --> ch06_enums/src/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: constant is never used: `MAX_POINTS`
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `z`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:258:5
[INFO] [stdout]     |
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:263:5
[INFO] [stdout]     |
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:264:5
[INFO] [stdout]     |
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> ch13a_functional/src/iterators.rs:38:8
[INFO] [stdout]    |
[INFO] [stdout] 38 |     fn new() -> Counter {
[INFO] [stdout]    |        ^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch08_collections v0.1.0 (/opt/rustwide/workdir/ch08_collections)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch05_structs v0.1.0 (/opt/rustwide/workdir/ch05_structs)
[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]     = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]     = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch03c_branches v0.1.0 (/opt/rustwide/workdir/ch03c_branches)
[INFO] [stderr]     Checking ch03b_functions v0.1.0 (/opt/rustwide/workdir/ch03b_functions)
[INFO] [stdout] warning: field is never read: `y`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:257:5
[INFO] [stdout]     |
[INFO] [stdout] 257 |     y: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `z`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:258:5
[INFO] [stdout]     |
[INFO] [stdout] 258 |     z: i32,
[INFO] [stdout]     |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Quit`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:262:5
[INFO] [stdout]     |
[INFO] [stdout] 262 |     Quit,
[INFO] [stdout]     |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Move`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:263:5
[INFO] [stdout]     |
[INFO] [stdout] 263 |     Move { x: i32, y: i32 },
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Write`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:264:5
[INFO] [stdout]     |
[INFO] [stdout] 264 |     Write(String),
[INFO] [stdout]     |     ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Rgb`
[INFO] [stdout]    --> ch18_patterns/src/main.rs:269:5
[INFO] [stdout]     |
[INFO] [stdout] 269 |     Rgb(i32, i32, i32),
[INFO] [stdout]     |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Context`
[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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[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: associated function is never used: `parse`
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_context`
[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 is never read: `diameter`
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `StrWrap`
[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 is never used: `foo`
[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 is never used: `foo_anon_lifetime`
[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: 11 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch15_smartpointers v0.1.0 (/opt/rustwide/workdir/ch15_smartpointers)
[INFO] [stdout] warning: constant is never used: `MAX_POINTS`
[INFO] [stdout]  --> ch03a_variables/src/main.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | const MAX_POINTS: u128 = 200_000;
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch04b_slices v0.1.0 (/opt/rustwide/workdir/ch04b_slices)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `value`
[INFO] [stdout]   --> ch11_tests/src/lib.rs:22:5
[INFO] [stdout]    |
[INFO] [stdout] 22 |     value: u32,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Alaska`
[INFO] [stdout]   --> ch06_enums/src/main.rs:30:5
[INFO] [stdout]    |
[INFO] [stdout] 30 |     Alaska,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Penny`
[INFO] [stdout]   --> ch06_enums/src/main.rs:35:5
[INFO] [stdout]    |
[INFO] [stdout] 35 |     Penny,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Nickel`
[INFO] [stdout]   --> ch06_enums/src/main.rs:36:5
[INFO] [stdout]    |
[INFO] [stdout] 36 |     Nickel,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant is never constructed: `Dime`
[INFO] [stdout]   --> ch06_enums/src/main.rs:37:5
[INFO] [stdout]    |
[INFO] [stdout] 37 |     Dime,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Context`
[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)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `Parser`
[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: associated function is never used: `parse`
[INFO] [stdout]  --> ch19_advancedfeatures/src/lifetimes.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 |     fn parse(&self) -> Result<(), &'s str> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `parse_context`
[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 is never read: `diameter`
[INFO] [stdout]   --> ch19_advancedfeatures/src/lifetimes.rs:21:5
[INFO] [stdout]    |
[INFO] [stdout] 21 |     diameter: &'a i32,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct is never constructed: `StrWrap`
[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 is never used: `foo`
[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 is never used: `foo_anon_lifetime`
[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: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 8 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch14b_add_one v0.1.0 (/opt/rustwide/workdir/ch14b_add_one)
[INFO] [stdout] warning: struct is never constructed: `LimitTracker`
[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]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `new`
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:15:12
[INFO] [stdout]    |
[INFO] [stdout] 15 |     pub fn new(messenger: &T, max: usize) -> LimitTracker<T> {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function is never used: `set_value`
[INFO] [stdout]   --> ch15_smartpointers/src/refcell.rs:23:12
[INFO] [stdout]    |
[INFO] [stdout] 23 |     pub fn set_value(&mut self, value: usize) {
[INFO] [stdout]    |            ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch02_guessing_game v0.1.0 (/opt/rustwide/workdir/ch02_guessing_game)
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]  --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     width: u32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking ch14a_adder v0.1.0 (/opt/rustwide/workdir/ch14a_adder)
[INFO] [stdout] warning: field is never read: `width`
[INFO] [stdout]  --> ch17_objectoriented/src/main.rs:9:5
[INFO] [stdout]   |
[INFO] [stdout] 9 |     width: u32,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field is never read: `height`
[INFO] [stdout]   --> ch17_objectoriented/src/main.rs:10:5
[INFO] [stdout]    |
[INFO] [stdout] 10 |     height: u32,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.89s
[INFO] running `Command { std: "docker" "inspect" "3a86760f50bd0787cd0b9e67653adfb65bd87fa0c048ffc0e46dc18fb12fdd8b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3a86760f50bd0787cd0b9e67653adfb65bd87fa0c048ffc0e46dc18fb12fdd8b", kill_on_drop: false }`
[INFO] [stdout] 3a86760f50bd0787cd0b9e67653adfb65bd87fa0c048ffc0e46dc18fb12fdd8b