[INFO] cloning repository https://github.com/johnshift/rust-ds
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/johnshift/rust-ds" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnshift%2Frust-ds", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnshift%2Frust-ds'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 847ffdcbeeec919343eb397e689e60606b0bd8a3
[INFO] checking johnshift/rust-ds against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnshift%2Frust-ds" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnshift/rust-ds on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johnshift/rust-ds
[INFO] finished tweaking git repo https://github.com/johnshift/rust-ds
[INFO] tweaked toml for git repo https://github.com/johnshift/rust-ds written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/johnshift/rust-ds 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] dec6ec95c62c45118a18be9140a5251ce0597abc3290dbe6a18c214ed14d5d26
[INFO] running `Command { std: "docker" "start" "-a" "dec6ec95c62c45118a18be9140a5251ce0597abc3290dbe6a18c214ed14d5d26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dec6ec95c62c45118a18be9140a5251ce0597abc3290dbe6a18c214ed14d5d26", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dec6ec95c62c45118a18be9140a5251ce0597abc3290dbe6a18c214ed14d5d26", kill_on_drop: false }`
[INFO] [stdout] dec6ec95c62c45118a18be9140a5251ce0597abc3290dbe6a18c214ed14d5d26
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 3988cca78d15de3feb107bbe4c98adee7fedf18a9d62e9be1046a899aa5f20c2
[INFO] running `Command { std: "docker" "start" "-a" "3988cca78d15de3feb107bbe4c98adee7fedf18a9d62e9be1046a899aa5f20c2", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]     Checking hashmap v0.1.0 (/opt/rustwide/workdir/hashmap)
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking smart-pointers v0.1.0 (/opt/rustwide/workdir/smart-pointers)
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> smart-pointers/src/boxx.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let list = Cons(1, Box::new(Cons(2, Box::new(Cons(3, Box::new(Nil))))));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `box_demo` is never used
[INFO] [stdout]  --> smart-pointers/src/boxx.rs:8:4
[INFO] [stdout]   |
[INFO] [stdout] 8 | fn box_demo() {
[INFO] [stdout]   |    ^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConsList` is never used
[INFO] [stdout]   --> smart-pointers/src/boxx.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum ConsList {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `box_cons` is never used
[INFO] [stdout]   --> smart-pointers/src/boxx.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn box_cons() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `SomeStruct` is never constructed
[INFO] [stdout]   --> smart-pointers/src/cell.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct SomeStruct {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Custom` is never constructed
[INFO] [stdout]  --> smart-pointers/src/deref.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Custom<T>(T);
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]  --> smart-pointers/src/deref.rs:6:6
[INFO] [stdout]   |
[INFO] [stdout] 5 | impl<T> Custom<T> {
[INFO] [stdout]   | ----------------- associated function in this implementation
[INFO] [stdout] 6 |   fn new(x: T) -> Custom<T> {
[INFO] [stdout]   |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Custom` is never constructed
[INFO] [stdout]  --> smart-pointers/src/drop.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Custom {
[INFO] [stdout]   |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConsList` is never used
[INFO] [stdout]   --> smart-pointers/src/rc.rs:19:6
[INFO] [stdout]    |
[INFO] [stdout] 19 | enum ConsList {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConsList` is never used
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 11 | enum ConsList {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 10 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking array v0.1.0 (/opt/rustwide/workdir/array)
[INFO] [stderr]     Checking trees v0.1.0 (/opt/rustwide/workdir/trees)
[INFO] [stdout] warning: unused variable: `list`
[INFO] [stdout]   --> smart-pointers/src/boxx.rs:32:9
[INFO] [stdout]    |
[INFO] [stdout] 32 |     let list = Cons(1, Box::new(Cons(2, Box::new(Cons(3, Box::new(Nil))))));
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_list`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `d`
[INFO] [stdout]   --> smart-pointers/src/drop.rs:26:9
[INFO] [stdout]    |
[INFO] [stdout] 26 |     let d = Custom {
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_d`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `b`
[INFO] [stdout]   --> smart-pointers/src/rc.rs:40:9
[INFO] [stdout]    |
[INFO] [stdout] 40 |     let b = Cons(3, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_b`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `c`
[INFO] [stdout]   --> smart-pointers/src/rc.rs:41:9
[INFO] [stdout]    |
[INFO] [stdout] 41 |     let c = Cons(4, Rc::clone(&a));
[INFO] [stdout]    |         ^ help: if this is intentional, prefix it with an underscore: `_c`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConsList` is never used
[INFO] [stdout]   --> smart-pointers/src/boxx.rs:20:6
[INFO] [stdout]    |
[INFO] [stdout] 20 | enum ConsList {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `box_cons` is never used
[INFO] [stdout]   --> smart-pointers/src/boxx.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn box_cons() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `regular_field` is never read
[INFO] [stdout]   --> smart-pointers/src/cell.rs:11:3
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct SomeStruct {
[INFO] [stdout]    |        ---------- field in this struct
[INFO] [stdout] 11 |   regular_field: u8,
[INFO] [stdout]    |   ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> smart-pointers/src/rc.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 |   Cons(i32, Rc<ConsList>),
[INFO] [stdout]    |   ---- ^^^  ^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   fields in this variant
[INFO] [stdout]    |
[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] 21 |   Cons((), ()),
[INFO] [stdout]    |        ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]   --> smart-pointers/src/refcell.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 |   Cons(Rc<RefCell<i32>>, Rc<ConsList>),
[INFO] [stdout]    |   ---- ^^^^^^^^^^^^^^^^  ^^^^^^^^^^^^
[INFO] [stdout]    |   |
[INFO] [stdout]    |   fields in this variant
[INFO] [stdout]    |
[INFO] [stdout]    = note: `ConsList` 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] 13 |   Cons((), ()),
[INFO] [stdout]    |        ~~  ~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stdout] warning: 9 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking stacks-queues v0.1.0 (/opt/rustwide/workdir/stacks-queues)
[INFO] [stdout] warning: struct `MyArray` is never constructed
[INFO] [stdout]   --> array/src/lib.rs:10:8
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct MyArray<T> {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `get`, `push`, `pop`, and `delete` are never used
[INFO] [stdout]   --> array/src/lib.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T> MyArray<T> {
[INFO] [stdout]    | ------------------ associated items in this implementation
[INFO] [stdout] 16 |   fn new(data: Vec<T>) -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 23 |   fn get(&self, index: usize) -> Option<&T> {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |   fn push(&mut self, item: T) -> usize {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |   fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |   fn delete(&mut self, index: usize) -> Option<T> {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `array_exercise1` is never used
[INFO] [stdout]  --> array/src/exercise.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn array_exercise1<T: Ord>(a1: Vec<T>, a2: Vec<T>) -> Vec<T> {
[INFO] [stdout]   |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> trees/src/binary_tree.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Node<T: Ord> {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> trees/src/binary_tree.rs:11:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | impl<T: Ord> Node<T> {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 11 |   fn new(value: T) -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Tree` is never constructed
[INFO] [stdout]   --> trees/src/binary_tree.rs:21:8
[INFO] [stdout]    |
[INFO] [stdout] 21 | struct Tree<T: Ord>(Option<Box<Node<T>>>);
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `insert`, and `has` are never used
[INFO] [stdout]   --> trees/src/binary_tree.rs:24:6
[INFO] [stdout]    |
[INFO] [stdout] 23 | impl<T: Ord> Tree<T> {
[INFO] [stdout]    | -------------------- associated items in this implementation
[INFO] [stdout] 24 |   fn new(value: T) -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |   fn insert(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |   fn has(&self, value: T) -> bool {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking iterators v0.1.0 (/opt/rustwide/workdir/iterators)
[INFO] [stderr]     Checking linked-list v0.1.0 (/opt/rustwide/workdir/linked-list)
[INFO] [stdout] warning: unused variable: `length`
[INFO] [stdout]   --> stacks-queues/src/stacks.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let length = self.elements.len();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_length`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TODO` is never constructed
[INFO] [stdout]   --> iterators/src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct TODO;
[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] [stderr]     Checking ref-deref v0.1.0 (/opt/rustwide/workdir/ref-deref)
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TODO` is never constructed
[INFO] [stdout]  --> ref-deref/src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct TODO;
[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] [stderr]     Checking fntools v0.1.0 (/opt/rustwide/workdir/fntools)
[INFO] [stdout] warning: struct `TODO` is never constructed
[INFO] [stdout]  --> ref-deref/src/lib.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 8 | struct TODO;
[INFO] [stdout]   |        ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `length`
[INFO] [stdout]   --> stacks-queues/src/stacks.rs:31:9
[INFO] [stdout]    |
[INFO] [stdout] 31 |     let length = self.elements.len();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_length`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Queue` is never constructed
[INFO] [stdout]  --> stacks-queues/src/queues.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Queue<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `peek`, `enqueue`, and `dequeue` are never used
[INFO] [stdout]   --> stacks-queues/src/queues.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 9  | impl<T> Queue<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 10 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |   fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 22 |   fn enqueue(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 28 |   fn dequeue(&mut self) -> Option<T> {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Stack` is never constructed
[INFO] [stdout]  --> stacks-queues/src/stacks.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | struct Stack<T> {
[INFO] [stdout]   |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `peek`, `push`, and `pop` are never used
[INFO] [stdout]   --> stacks-queues/src/stacks.rs:8:6
[INFO] [stdout]    |
[INFO] [stdout] 7  | impl<T> Stack<T> {
[INFO] [stdout]    | ---------------- associated items in this implementation
[INFO] [stdout] 8  |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 15 |   fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 25 |   fn push(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 30 |   fn pop(&mut self) -> Option<T> {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 5 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stdout] warning: function `filter_demo` is never used
[INFO] [stdout]  --> fntools/src/filter.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn filter_demo(start: usize, end: usize, x: usize) -> Vec<usize> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fold_startend` is never used
[INFO] [stdout]  --> fntools/src/fold.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn fold_startend(start: i32, end: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `map_squared` is never used
[INFO] [stdout]  --> fntools/src/map.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn map_squared(a: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse` is never used
[INFO] [stdout]  --> fntools/src/rev.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn reverse<T>(arr: Vec<T>) -> Vec<T> {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `zip_demo` is never used
[INFO] [stdout]  --> fntools/src/zip.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn zip_demo<T>(arr1: Vec<T>, arr2: Vec<T>)
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `zip_merge` is never used
[INFO] [stdout]   --> fntools/src/zip.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn zip_merge<T>(arr1: Vec<T>, arr2: Vec<T>) -> Vec<T>
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TODO` is never constructed
[INFO] [stdout]   --> iterators/src/lib.rs:19:8
[INFO] [stdout]    |
[INFO] [stdout] 19 | struct TODO;
[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] [stderr]    Compiling quote v1.0.9
[INFO] [stdout] warning: struct `SinglyLinkedList` is never constructed
[INFO] [stdout]   --> linked-list/src/lib.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct SinglyLinkedList<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> linked-list/src/lib.rs:29:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<T: Sized> SinglyLinkedList<T> {
[INFO] [stdout]    | ---------------------------------- associated items in this implementation
[INFO] [stdout] 29 |   fn new(value: T) -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |   fn len(&self) -> usize {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |   fn head(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |   fn tail(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |   fn append(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |   fn prepend(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |   fn insert(&mut self, index: usize, value: T) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |   fn remove(&mut self, index: usize) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |   fn reverse(&mut self) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `next` are never read
[INFO] [stdout]   --> linked-list/src/bad_linked_list.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Node {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 16 |   // final size: 16 bytes -> largest=8bytes multipled by two fields
[INFO] [stdout] 17 |   value: i32, // 4 bytes
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 18 |   next: Link, // 8 bytes
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `head` is never read
[INFO] [stdout]   --> linked-list/src/bad_linked_list.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct LinkedList {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 22 |   // final size: 8 bytes
[INFO] [stdout] 23 |   head: Link, // Link -> 8 bytes
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, and `pop` are never used
[INFO] [stdout]   --> linked-list/src/bad_linked_list.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl LinkedList {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 27 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |   fn prepend(&mut self, value: i32) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |   fn pop(&mut self) -> Option<i32> {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `tail`, and `head` are never used
[INFO] [stdout]   --> linked-list/src/better_linked_list.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T> List<T> {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |   fn prepend(&self, value: T) -> List<T> {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |   fn tail(&self) -> List<T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |   fn head(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `peek`, and `peek_mut` are never used
[INFO] [stdout]   --> linked-list/src/ok_linked_list.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 16 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |   fn prepend(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |   fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |   fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling cast v0.2.7
[INFO] [stdout] warning: 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]     Checking criterion-plot v0.4.4
[INFO] [stderr]     Checking bstr v0.2.16
[INFO] [stderr]     Checking serde_cbor v0.11.2
[INFO] [stderr]     Checking csv v1.1.6
[INFO] [stderr]     Checking tinytemplate v1.2.1
[INFO] [stderr]     Checking criterion v0.3.5
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 7.59s
[INFO] [stderr] warning: the following packages contain code that will be rejected by a future version of Rust: criterion v0.3.5
[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" "3988cca78d15de3feb107bbe4c98adee7fedf18a9d62e9be1046a899aa5f20c2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3988cca78d15de3feb107bbe4c98adee7fedf18a9d62e9be1046a899aa5f20c2", kill_on_drop: false }`
[INFO] [stdout] 3988cca78d15de3feb107bbe4c98adee7fedf18a9d62e9be1046a899aa5f20c2
[INFO] checking johnshift/rust-ds against try#f9935d29d867449445ee008640ccca1bf1ae0889+rustflags=-Dtail_expr_drop_order for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fjohnshift%2Frust-ds" "/workspace/builds/worker-0-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/johnshift/rust-ds on toolchain f9935d29d867449445ee008640ccca1bf1ae0889
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/johnshift/rust-ds
[INFO] finished tweaking git repo https://github.com/johnshift/rust-ds
[INFO] tweaked toml for git repo https://github.com/johnshift/rust-ds written to /workspace/builds/worker-0-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/johnshift/rust-ds 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" "+f9935d29d867449445ee008640ccca1bf1ae0889" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 799c7b7b6b7faa397ae38bfd73180030c55d08c3594b29e41d65a2dd20b9a05c
[INFO] running `Command { std: "docker" "start" "-a" "799c7b7b6b7faa397ae38bfd73180030c55d08c3594b29e41d65a2dd20b9a05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "799c7b7b6b7faa397ae38bfd73180030c55d08c3594b29e41d65a2dd20b9a05c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "799c7b7b6b7faa397ae38bfd73180030c55d08c3594b29e41d65a2dd20b9a05c", kill_on_drop: false }`
[INFO] [stdout] 799c7b7b6b7faa397ae38bfd73180030c55d08c3594b29e41d65a2dd20b9a05c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc2/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 -Dtail_expr_drop_order" "-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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+f9935d29d867449445ee008640ccca1bf1ae0889" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] edbe41f3c6cbda27224ece9ee9bbc652294a55d8e6ebf959df8c03db5716b46f
[INFO] running `Command { std: "docker" "start" "-a" "edbe41f3c6cbda27224ece9ee9bbc652294a55d8e6ebf959df8c03db5716b46f", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.5
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling semver v1.0.4
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling libc v0.2.99
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.5
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]    Compiling ryu v1.0.5
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking itoa v0.4.7
[INFO] [stderr]     Checking either v1.6.1
[INFO] [stderr]    Compiling serde_json v1.0.66
[INFO] [stderr]    Compiling serde_derive v1.0.127
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking itertools v0.10.1
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking half v1.7.1
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking oorandom v11.1.3
[INFO] [stderr]    Compiling memoffset v0.6.4
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking hashmap v0.1.0 (/opt/rustwide/workdir/hashmap)
[INFO] [stderr]     Checking fntools v0.1.0 (/opt/rustwide/workdir/fntools)
[INFO] [stderr]     Checking crossbeam-channel v0.5.1
[INFO] [stderr]    Compiling rustc_version v0.4.0
[INFO] [stdout] warning: function `filter_demo` is never used
[INFO] [stdout]  --> fntools/src/filter.rs:4:4
[INFO] [stdout]   |
[INFO] [stdout] 4 | fn filter_demo(start: usize, end: usize, x: usize) -> Vec<usize> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `fold_startend` is never used
[INFO] [stdout]  --> fntools/src/fold.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn fold_startend(start: i32, end: i32) -> i32 {
[INFO] [stdout]   |    ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `map_squared` is never used
[INFO] [stdout]  --> fntools/src/map.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn map_squared(a: Vec<i32>) -> Vec<i32> {
[INFO] [stdout]   |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `reverse` is never used
[INFO] [stdout]  --> fntools/src/rev.rs:3:4
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn reverse<T>(arr: Vec<T>) -> Vec<T> {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `zip_demo` is never used
[INFO] [stdout]  --> fntools/src/zip.rs:3:8
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub fn zip_demo<T>(arr1: Vec<T>, arr2: Vec<T>)
[INFO] [stdout]   |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `zip_merge` is never used
[INFO] [stdout]   --> fntools/src/zip.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | pub fn zip_merge<T>(arr1: Vec<T>, arr2: Vec<T>) -> Vec<T>
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]  --> fntools/src/rev.rs:4:3
[INFO] [stdout]   |
[INFO] [stdout] 3 | fn reverse<T>(arr: Vec<T>) -> Vec<T> {
[INFO] [stdout]   |               ----------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 4 |   arr.into_iter().rev().collect()
[INFO] [stdout]   |   ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = warning: this changes meaning in Rust 2024
[INFO] [stdout]   = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]   = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking linked-list v0.1.0 (/opt/rustwide/workdir/linked-list)
[INFO] [stdout] error: aborting due to 1 previous error; 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `fntools` (lib) due to 2 previous errors; 6 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stdout] warning: struct `SinglyLinkedList` is never constructed
[INFO] [stdout]   --> linked-list/src/lib.rs:24:8
[INFO] [stdout]    |
[INFO] [stdout] 24 | struct SinglyLinkedList<T> {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: multiple associated items are never used
[INFO] [stdout]   --> linked-list/src/lib.rs:29:6
[INFO] [stdout]    |
[INFO] [stdout] 28 | impl<T: Sized> SinglyLinkedList<T> {
[INFO] [stdout]    | ---------------------------------- associated items in this implementation
[INFO] [stdout] 29 |   fn new(value: T) -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 35 |   fn len(&self) -> usize {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 42 |   fn head(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 52 |   fn tail(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 61 |   fn append(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 66 |   fn prepend(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 73 |   fn insert(&mut self, index: usize, value: T) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 78 |   fn remove(&mut self, index: usize) {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 83 |   fn reverse(&mut self) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `value` and `next` are never read
[INFO] [stdout]   --> linked-list/src/bad_linked_list.rs:17:3
[INFO] [stdout]    |
[INFO] [stdout] 15 | pub struct Node {
[INFO] [stdout]    |            ---- fields in this struct
[INFO] [stdout] 16 |   // final size: 16 bytes -> largest=8bytes multipled by two fields
[INFO] [stdout] 17 |   value: i32, // 4 bytes
[INFO] [stdout]    |   ^^^^^
[INFO] [stdout] 18 |   next: Link, // 8 bytes
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `head` is never read
[INFO] [stdout]   --> linked-list/src/bad_linked_list.rs:23:3
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub struct LinkedList {
[INFO] [stdout]    |            ---------- field in this struct
[INFO] [stdout] 22 |   // final size: 8 bytes
[INFO] [stdout] 23 |   head: Link, // Link -> 8 bytes
[INFO] [stdout]    |   ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, and `pop` are never used
[INFO] [stdout]   --> linked-list/src/bad_linked_list.rs:27:6
[INFO] [stdout]    |
[INFO] [stdout] 26 | impl LinkedList {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 27 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 32 |   fn prepend(&mut self, value: i32) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 51 |   fn pop(&mut self) -> Option<i32> {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `tail`, and `head` are never used
[INFO] [stdout]   --> linked-list/src/better_linked_list.rs:15:6
[INFO] [stdout]    |
[INFO] [stdout] 14 | impl<T> List<T> {
[INFO] [stdout]    | --------------- associated items in this implementation
[INFO] [stdout] 15 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 21 |   fn prepend(&self, value: T) -> List<T> {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 31 |   fn tail(&self) -> List<T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 38 |   fn head(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `prepend`, `peek`, and `peek_mut` are never used
[INFO] [stdout]   --> linked-list/src/ok_linked_list.rs:16:6
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl<T> LinkedList<T> {
[INFO] [stdout]    | --------------------- associated items in this implementation
[INFO] [stdout] 16 |   fn new() -> Self {
[INFO] [stdout]    |      ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |   fn prepend(&mut self, value: T) {
[INFO] [stdout]    |      ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 40 |   fn peek(&self) -> Option<&T> {
[INFO] [stdout]    |      ^^^^
[INFO] [stdout] ...
[INFO] [stdout] 45 |   fn peek_mut(&mut self) -> Option<&mut T> {
[INFO] [stdout]    |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: these values and local bindings have significant drop implementation that will have a different drop order from that of Edition 2021
[INFO] [stdout]   --> linked-list/src/better_linked_list.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |     fn prepend(&self, value: T) -> List<T> {
[INFO] [stdout]    |                       -------- these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] 22 |       List {
[INFO] [stdout] 23 |         head: Some(Rc::new(Node {
[INFO] [stdout]    |  _____________^
[INFO] [stdout] 24 | |         value,
[INFO] [stdout] 25 | |         next: self.head.clone(), // clone -> Rc::clone()
[INFO] [stdout] 26 | |       })),
[INFO] [stdout]    | |_________^
[INFO] [stdout]    |
[INFO] [stdout]    = warning: this changes meaning in Rust 2024
[INFO] [stdout]    = note: for more information, see issue #123739 <https://github.com/rust-lang/rust/issues/123739>
[INFO] [stdout]    = note: requested on the command line with `-D tail-expr-drop-order`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 1 previous error; 7 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `linked-list` (lib) due to 2 previous errors; 7 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "edbe41f3c6cbda27224ece9ee9bbc652294a55d8e6ebf959df8c03db5716b46f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "edbe41f3c6cbda27224ece9ee9bbc652294a55d8e6ebf959df8c03db5716b46f", kill_on_drop: false }`
[INFO] [stdout] edbe41f3c6cbda27224ece9ee9bbc652294a55d8e6ebf959df8c03db5716b46f