[INFO] cloning repository https://github.com/zarix908/advent_of_code2022
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/zarix908/advent_of_code2022" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzarix908%2Fadvent_of_code2022", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzarix908%2Fadvent_of_code2022'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 90261a72aef387046811d83c0a4807657b4088c1
[INFO] checking zarix908/advent_of_code2022 against master#bd71213cf0a765705e7d72a099151bd4eb465ccb for pr-123864
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fzarix908%2Fadvent_of_code2022" "/workspace/builds/worker-3-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-3-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/zarix908/advent_of_code2022 on toolchain bd71213cf0a765705e7d72a099151bd4eb465ccb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+bd71213cf0a765705e7d72a099151bd4eb465ccb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/zarix908/advent_of_code2022
[INFO] finished tweaking git repo https://github.com/zarix908/advent_of_code2022
[INFO] tweaked toml for git repo https://github.com/zarix908/advent_of_code2022 written to /workspace/builds/worker-3-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/zarix908/advent_of_code2022 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" "+bd71213cf0a765705e7d72a099151bd4eb465ccb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded kiam v0.1.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bd71213cf0a765705e7d72a099151bd4eb465ccb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 284f7f9eddfc3a890e304de72196fa122047748a17528b709570cecbfcd9055a
[INFO] running `Command { std: "docker" "start" "-a" "284f7f9eddfc3a890e304de72196fa122047748a17528b709570cecbfcd9055a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "284f7f9eddfc3a890e304de72196fa122047748a17528b709570cecbfcd9055a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "284f7f9eddfc3a890e304de72196fa122047748a17528b709570cecbfcd9055a", kill_on_drop: false }`
[INFO] [stdout] 284f7f9eddfc3a890e304de72196fa122047748a17528b709570cecbfcd9055a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+bd71213cf0a765705e7d72a099151bd4eb465ccb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] fd2739635f590b52fabc3298e355cb0a214676bc95f0ca6f2c754c8ad60fddc9
[INFO] running `Command { std: "docker" "start" "-a" "fd2739635f590b52fabc3298e355cb0a214676bc95f0ca6f2c754c8ad60fddc9", kill_on_drop: false }`
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]    Compiling libc v0.2.138
[INFO] [stderr]    Compiling fs_extra v1.2.0
[INFO] [stderr]    Compiling cc v1.0.78
[INFO] [stderr]     Checking regex-syntax v0.6.28
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking kiam v0.1.1
[INFO] [stderr]     Checking aho-corasick v0.7.20
[INFO] [stderr]    Compiling jemalloc-sys v0.5.2+5.3.0-patched
[INFO] [stderr]     Checking regex v1.7.0
[INFO] [stderr]     Checking jemallocator v0.5.0
[INFO] [stderr]     Checking advent_of_code v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `cmp::Ordering`
[INFO] [stdout]  --> src/t42.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     cmp::Ordering
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/t81.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 |     cmp::max, borrow::Borrow
[INFO] [stdout]   |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `cmp::Ordering`
[INFO] [stdout]  --> src/t42.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 |     cmp::Ordering
[INFO] [stdout]   |     ^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `borrow::Borrow`
[INFO] [stdout]  --> src/t81.rs:4:15
[INFO] [stdout]   |
[INFO] [stdout] 4 |     cmp::max, borrow::Borrow
[INFO] [stdout]   |               ^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t11.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t12.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t21.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t22.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t31.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t32.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t41.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t42.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t51.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t52.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t61.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve(mut reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t62.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve(mut reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Directory` is never constructed
[INFO] [stdout]   --> src/t71.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Directory {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]   --> src/t71.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum Node {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_child`, `get_child`, `parent`, and `size` are never used
[INFO] [stdout]   --> src/t71.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Node {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 23 |     fn add_child(&mut self, name: String, child: Rc<RefCell<Node>>) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn get_child(&self, name: &str) -> Option<Rc<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn parent(&self) -> Option<Weak<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn size(&mut self, total: &mut u32) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/t71.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_tree` is never used
[INFO] [stdout]   --> src/t71.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn build_tree(reader: BufReader<File>) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]   --> src/t72.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Directory {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 13 |     size: Option<u32>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `File` and `Dir` are never constructed
[INFO] [stdout]   --> src/t72.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum NodeEntity {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 18 |     File(u32),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     Dir(Directory)
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]   --> src/t72.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Node {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 23 |     entity: NodeEntity,
[INFO] [stdout] 24 |     parent: Option<Weak<RefCell<Node>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_child`, `get_child`, `parent`, `is_file`, `size`, and `set_size` are never used
[INFO] [stdout]   --> src/t72.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Node {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 28 |     fn add_child(&mut self, name: Rc<String>, child: Rc<RefCell<Node>>) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn get_child(&self, name: &Rc<String>) -> Option<Rc<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn parent(&self) -> Option<Weak<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn is_file(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     fn size(&self) -> Option<u32> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn set_size(&mut self, size: u32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]    --> src/t72.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_tree` is never used
[INFO] [stdout]    --> src/t72.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn build_tree(reader: BufReader<File>) -> Tree {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_cb` is never used
[INFO] [stdout]  --> src/mem.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern "C" fn write_cb(_: *mut c_void, message: *const c_char) {
[INFO] [stdout]   |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mem_print` is never used
[INFO] [stdout]   --> src/mem.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn mem_print() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t11.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t12.rs:6:8
[INFO] [stdout]   |
[INFO] [stdout] 6 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t21.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t22.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t31.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t32.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t41.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t42.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t51.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t52.rs:7:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t61.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve(mut reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]  --> src/t62.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub fn solve(mut reader: BufReader<File>) {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Directory` is never constructed
[INFO] [stdout]   --> src/t71.rs:11:8
[INFO] [stdout]    |
[INFO] [stdout] 11 | struct Directory {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Node` is never used
[INFO] [stdout]   --> src/t71.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum Node {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_child`, `get_child`, `parent`, and `size` are never used
[INFO] [stdout]   --> src/t71.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 22 | impl Node {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 23 |     fn add_child(&mut self, name: String, child: Rc<RefCell<Node>>) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |     fn get_child(&self, name: &str) -> Option<Rc<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 37 |     fn parent(&self) -> Option<Weak<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |     fn size(&mut self, total: &mut u32) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]   --> src/t71.rs:72:8
[INFO] [stdout]    |
[INFO] [stdout] 72 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_tree` is never used
[INFO] [stdout]   --> src/t71.rs:79:4
[INFO] [stdout]    |
[INFO] [stdout] 79 | fn build_tree(reader: BufReader<File>) -> Rc<RefCell<Node>> {
[INFO] [stdout]    |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `size` is never read
[INFO] [stdout]   --> src/t72.rs:13:5
[INFO] [stdout]    |
[INFO] [stdout] 12 | struct Directory {
[INFO] [stdout]    |        --------- field in this struct
[INFO] [stdout] 13 |     size: Option<u32>,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `File` and `Dir` are never constructed
[INFO] [stdout]   --> src/t72.rs:18:5
[INFO] [stdout]    |
[INFO] [stdout] 17 | enum NodeEntity {
[INFO] [stdout]    |      ---------- variants in this enum
[INFO] [stdout] 18 |     File(u32),
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 19 |     Dir(Directory)
[INFO] [stdout]    |     ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `parent` is never read
[INFO] [stdout]   --> src/t72.rs:24:5
[INFO] [stdout]    |
[INFO] [stdout] 22 | struct Node {
[INFO] [stdout]    |        ---- field in this struct
[INFO] [stdout] 23 |     entity: NodeEntity,
[INFO] [stdout] 24 |     parent: Option<Weak<RefCell<Node>>>,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `add_child`, `get_child`, `parent`, `is_file`, `size`, and `set_size` are never used
[INFO] [stdout]   --> src/t72.rs:28:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | impl Node {
[INFO] [stdout]    | --------- methods in this implementation
[INFO] [stdout] 28 |     fn add_child(&mut self, name: Rc<String>, child: Rc<RefCell<Node>>) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |     fn get_child(&self, name: &Rc<String>) -> Option<Rc<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 43 |     fn parent(&self) -> Option<Weak<RefCell<Node>>> {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn is_file(&self) -> bool {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 54 |     fn size(&self) -> Option<u32> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |     fn set_size(&mut self, size: u32) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `solve` is never used
[INFO] [stdout]    --> src/t72.rs:107:8
[INFO] [stdout]     |
[INFO] [stdout] 107 | pub fn solve(reader: BufReader<File>) {
[INFO] [stdout]     |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `build_tree` is never used
[INFO] [stdout]    --> src/t72.rs:143:4
[INFO] [stdout]     |
[INFO] [stdout] 143 | fn build_tree(reader: BufReader<File>) -> Tree {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `write_cb` is never used
[INFO] [stdout]  --> src/mem.rs:6:15
[INFO] [stdout]   |
[INFO] [stdout] 6 | extern "C" fn write_cb(_: *mut c_void, message: *const c_char) {
[INFO] [stdout]   |               ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `mem_print` is never used
[INFO] [stdout]   --> src/mem.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub fn mem_print() {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 27 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 27.05s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: fs_extra v1.2.0
[INFO] [stderr] note: to see what the problems were, use the option `--future-incompat-report`, or run `cargo report future-incompatibilities --id 1`
[INFO] running `Command { std: "docker" "inspect" "fd2739635f590b52fabc3298e355cb0a214676bc95f0ca6f2c754c8ad60fddc9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd2739635f590b52fabc3298e355cb0a214676bc95f0ca6f2c754c8ad60fddc9", kill_on_drop: false }`
[INFO] [stdout] fd2739635f590b52fabc3298e355cb0a214676bc95f0ca6f2c754c8ad60fddc9