[INFO] cloning repository https://github.com/ashishnegi/learn-rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ashishnegi/learn-rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishnegi%2Flearn-rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishnegi%2Flearn-rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] a4d506c3c73c5f342f57cfaab64d671126307084
[INFO] checking ashishnegi/learn-rust/a4d506c3c73c5f342f57cfaab64d671126307084 against try#4d98531622e1718ae0bc3c7a1ab9cd8938428452+rustflags=-Dtail_expr_drop_order for pr-129604
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fashishnegi%2Flearn-rust" "/workspace/builds/worker-4-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ashishnegi/learn-rust on toolchain 4d98531622e1718ae0bc3c7a1ab9cd8938428452
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ashishnegi/learn-rust
[INFO] finished tweaking git repo https://github.com/ashishnegi/learn-rust
[INFO] tweaked toml for git repo https://github.com/ashishnegi/learn-rust written to /workspace/builds/worker-4-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/ashishnegi/learn-rust 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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f5a02a3edc462087ecc406b5d8562d11e773e51962ec170cd2eb02d521b77047
[INFO] running `Command { std: "docker" "start" "-a" "f5a02a3edc462087ecc406b5d8562d11e773e51962ec170cd2eb02d521b77047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f5a02a3edc462087ecc406b5d8562d11e773e51962ec170cd2eb02d521b77047", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f5a02a3edc462087ecc406b5d8562d11e773e51962ec170cd2eb02d521b77047", kill_on_drop: false }`
[INFO] [stdout] f5a02a3edc462087ecc406b5d8562d11e773e51962ec170cd2eb02d521b77047
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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" "+4d98531622e1718ae0bc3c7a1ab9cd8938428452" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1676ac825ebeb81a666498dfcbd245a63333fc6d96b824bacbc2c708c765b070
[INFO] running `Command { std: "docker" "start" "-a" "1676ac825ebeb81a666498dfcbd245a63333fc6d96b824bacbc2c708c765b070", kill_on_drop: false }`
[INFO] [stderr] warning: no edition set: defaulting to the 2015 edition while the latest is 2021
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling libc v0.2.68
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling semver-parser v0.7.0
[INFO] [stderr]    Compiling serde v1.0.105
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling ryu v1.0.3
[INFO] [stderr]    Compiling semver v0.9.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.9
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling unicode-xid v0.2.0
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling cast v0.2.3
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling rayon-core v1.7.0
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking itoa v0.4.5
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking crossbeam-queue v0.2.1
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking num_cpus v1.12.0
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking unicode-width v0.1.7
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking crossbeam-deque v0.7.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking regex-syntax v0.6.17
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking same-file v1.0.6
[INFO] [stderr]     Checking rayon v1.3.0
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking walkdir v2.3.1
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking plotters v0.2.12
[INFO] [stderr]     Checking criterion-plot v0.4.1
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking oorandom v11.1.0
[INFO] [stderr]     Checking learnrust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking regex v1.3.6
[INFO] [stdout] warning: unused variable: `arg2`
[INFO] [stdout]    --> src/talk.rs:123:27
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn createUser(arg1 : i32, arg2 : i32) -> ConditionalValue<User> {
[INFO] [stdout]     |                           ^^^^ help: if this is intentional, prefix it with an underscore: `_arg2`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `arg2`
[INFO] [stdout]    --> src/talk.rs:147:28
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn createUser2(arg1 : i32, arg2 : i32) -> Result<User, String> {
[INFO] [stdout]     |                            ^^^^ help: if this is intentional, prefix it with an underscore: `_arg2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `user`
[INFO] [stdout]    --> src/talk.rs:269:29
[INFO] [stdout]     |
[INFO] [stdout] 269 |         Visitor::Registered(user) => {
[INFO] [stdout]     |                             ^^^^ help: if this is intentional, prefix it with an underscore: `_user`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Rectangle` is never constructed
[INFO] [stdout]  --> src/area.rs:2:8
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct Rectangle {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]  --> src/area.rs:8:8
[INFO] [stdout]   |
[INFO] [stdout] 7 | impl Rectangle {
[INFO] [stdout]   | -------------- method in this implementation
[INFO] [stdout] 8 |     fn area(&self) -> u32 {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Square` is never constructed
[INFO] [stdout]   --> src/area.rs:13:8
[INFO] [stdout]    |
[INFO] [stdout] 13 | struct Square {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: method `area` is never used
[INFO] [stdout]   --> src/area.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | impl Square {
[INFO] [stdout]    | ----------- method in this implementation
[INFO] [stdout] 18 |     fn area(&self) -> u32 {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `plus_one` is never used
[INFO] [stdout]   --> src/maybe.rs:15:4
[INFO] [stdout]    |
[INFO] [stdout] 15 | fn plus_one(there: Option<u32>) -> Option<u32> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `merge_sort` is never used
[INFO] [stdout]  --> src/collection.rs:2:4
[INFO] [stdout]   |
[INFO] [stdout] 2 | fn merge_sort(arr: & mut[u32], start: usize, end: usize) {
[INFO] [stdout]   |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TeaError` is never used
[INFO] [stdout]  --> src/errors.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum TeaError {
[INFO] [stdout]   |      ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `append` is never used
[INFO] [stdout]  --> src/errors.rs:9:4
[INFO] [stdout]   |
[INFO] [stdout] 9 | fn append(s1: String, s2: String) -> String {
[INFO] [stdout]   |    ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `get_milk_from_cow` is never used
[INFO] [stdout]   --> src/errors.rs:13:4
[INFO] [stdout]    |
[INFO] [stdout] 13 | fn get_milk_from_cow(cow: bool) -> Result<String, TeaError> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `pour_milk` is never used
[INFO] [stdout]   --> src/errors.rs:21:4
[INFO] [stdout]    |
[INFO] [stdout] 21 | fn pour_milk(milk: bool) -> Result<String, TeaError> {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_tea` is never used
[INFO] [stdout]   --> src/errors.rs:29:4
[INFO] [stdout]    |
[INFO] [stdout] 29 | fn make_tea() -> Result<String, TeaError> {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `largest` is never used
[INFO] [stdout]  --> src/traits.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn largest<T: PartialOrd>(ts: &[T]) -> &T {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Talkable` is never used
[INFO] [stdout]   --> src/traits.rs:11:7
[INFO] [stdout]    |
[INFO] [stdout] 11 | trait Talkable {
[INFO] [stdout]    |       ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Human` is never constructed
[INFO] [stdout]   --> src/traits.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Human {}
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cat` is never constructed
[INFO] [stdout]   --> src/traits.rs:18:8
[INFO] [stdout]    |
[INFO] [stdout] 18 | struct Cat {}
[INFO] [stdout]    |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Res` is never constructed
[INFO] [stdout]  --> src/grep.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Res {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `search_contents` is never used
[INFO] [stdout]   --> src/grep.rs:10:4
[INFO] [stdout]    |
[INFO] [stdout] 10 | fn search_contents(contents: &str, search: &str) -> Vec<Res> {
[INFO] [stdout]    |    ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `grep` is never used
[INFO] [stdout]   --> src/grep.rs:25:4
[INFO] [stdout]    |
[INFO] [stdout] 25 | fn grep(filename: &str, search: &str) -> Result<Vec<Res>, Error> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add_one` is never used
[INFO] [stdout]  --> src/closures.rs:1:4
[INFO] [stdout]   |
[INFO] [stdout] 1 | fn add_one<F>(closure: F, y: u32) -> u32
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `add` is never used
[INFO] [stdout]  --> src/closures.rs:7:4
[INFO] [stdout]   |
[INFO] [stdout] 7 | fn add(x: u32, y: u32) -> u32 {
[INFO] [stdout]   |    ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Even` is never constructed
[INFO] [stdout]   --> src/closures.rs:17:8
[INFO] [stdout]    |
[INFO] [stdout] 17 | struct Even {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `TrafficLight` is never used
[INFO] [stdout]   --> src/talk.rs:25:6
[INFO] [stdout]    |
[INFO] [stdout] 25 | enum TrafficLight {
[INFO] [stdout]    |      ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Event` is never used
[INFO] [stdout]   --> src/talk.rs:37:6
[INFO] [stdout]    |
[INFO] [stdout] 37 | enum Event {
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Color` is never constructed
[INFO] [stdout]   --> src/talk.rs:43:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | struct Color {
[INFO] [stdout]    |        ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Coordinate` is never constructed
[INFO] [stdout]   --> src/talk.rs:49:8
[INFO] [stdout]    |
[INFO] [stdout] 49 | struct Coordinate {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `ConditionalValue` is never used
[INFO] [stdout]    --> src/talk.rs:116:6
[INFO] [stdout]     |
[INFO] [stdout] 116 | enum ConditionalValue<T> {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `User` is never constructed
[INFO] [stdout]    --> src/talk.rs:121:8
[INFO] [stdout]     |
[INFO] [stdout] 121 | struct User {}
[INFO] [stdout]     |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createUser` is never used
[INFO] [stdout]    --> src/talk.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn createUser(arg1 : i32, arg2 : i32) -> ConditionalValue<User> {
[INFO] [stdout]     |    ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Result` is never used
[INFO] [stdout]    --> src/talk.rs:142:6
[INFO] [stdout]     |
[INFO] [stdout] 142 | enum Result<T, E> {
[INFO] [stdout]     |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createUser2` is never used
[INFO] [stdout]    --> src/talk.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn createUser2(arg1 : i32, arg2 : i32) -> Result<User, String> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `AgeRange` is never constructed
[INFO] [stdout]    --> src/talk.rs:161:8
[INFO] [stdout]     |
[INFO] [stdout] 161 | struct AgeRange {
[INFO] [stdout]     |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `UserCreationError` is never used
[INFO] [stdout]    --> src/talk.rs:167:6
[INFO] [stdout]     |
[INFO] [stdout] 167 | enum UserCreationError {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createUser3` is never used
[INFO] [stdout]    --> src/talk.rs:174:4
[INFO] [stdout]     |
[INFO] [stdout] 174 | fn createUser3(age: i32, password : String) -> Result<User,UserCreationError> {
[INFO] [stdout]     |    ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Value` is never used
[INFO] [stdout]    --> src/talk.rs:195:6
[INFO] [stdout]     |
[INFO] [stdout] 195 | enum Value {
[INFO] [stdout]     |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Job` is never constructed
[INFO] [stdout]    --> src/talk.rs:214:8
[INFO] [stdout]     |
[INFO] [stdout] 214 | struct Job {}
[INFO] [stdout]     |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `JobQueueCommand` is never used
[INFO] [stdout]    --> src/talk.rs:216:6
[INFO] [stdout]     |
[INFO] [stdout] 216 | enum JobQueueCommand {
[INFO] [stdout]     |      ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `AuthMethod` is never used
[INFO] [stdout]    --> src/talk.rs:224:6
[INFO] [stdout]     |
[INFO] [stdout] 224 | enum AuthMethod {
[INFO] [stdout]     |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Cookie` is never constructed
[INFO] [stdout]    --> src/talk.rs:230:8
[INFO] [stdout]     |
[INFO] [stdout] 230 | struct Cookie {}
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Secret` is never constructed
[INFO] [stdout]    --> src/talk.rs:231:8
[INFO] [stdout]     |
[INFO] [stdout] 231 | struct Secret {}
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Header` is never constructed
[INFO] [stdout]    --> src/talk.rs:232:8
[INFO] [stdout]     |
[INFO] [stdout] 232 | struct Header {}
[INFO] [stdout]     |        ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Visitor` is never used
[INFO] [stdout]    --> src/talk.rs:259:6
[INFO] [stdout]     |
[INFO] [stdout] 259 | enum Visitor {
[INFO] [stdout]     |      ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `feature1` is never used
[INFO] [stdout]    --> src/talk.rs:267:4
[INFO] [stdout]     |
[INFO] [stdout] 267 | fn feature1(visitor : Visitor) {
[INFO] [stdout]     |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `FacebookId` is never constructed
[INFO] [stdout]    --> src/talk.rs:276:8
[INFO] [stdout]     |
[INFO] [stdout] 276 | struct FacebookId {}
[INFO] [stdout]     |        ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Node` is never constructed
[INFO] [stdout]  --> src/tree.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct Node {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `make_tree` is never used
[INFO] [stdout]   --> src/tree.rs:11:4
[INFO] [stdout]    |
[INFO] [stdout] 11 | fn make_tree() {
[INFO] [stdout]    |    ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `thread1` is never used
[INFO] [stdout]  --> src/threads.rs:5:4
[INFO] [stdout]   |
[INFO] [stdout] 5 | fn thread1() {
[INFO] [stdout]   |    ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `channels` is never used
[INFO] [stdout]   --> src/threads.rs:17:4
[INFO] [stdout]    |
[INFO] [stdout] 17 | fn channels() {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Post` is never constructed
[INFO] [stdout]  --> src/posts.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Post {
[INFO] [stdout]   |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `DraftPost` is never constructed
[INFO] [stdout]  --> src/posts.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 | struct DraftPost {
[INFO] [stdout]   |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `PendingPost` is never constructed
[INFO] [stdout]  --> src/posts.rs:9:8
[INFO] [stdout]   |
[INFO] [stdout] 9 | struct PendingPost {
[INFO] [stdout]   |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new` and `content` are never used
[INFO] [stdout]   --> src/posts.rs:16:8
[INFO] [stdout]    |
[INFO] [stdout] 15 | impl Post {
[INFO] [stdout]    | --------- associated items in this implementation
[INFO] [stdout] 16 |     fn new() -> DraftPost {
[INFO] [stdout]    |        ^^^
[INFO] [stdout] ...
[INFO] [stdout] 20 |     fn content(&self) -> &str {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `req_review` and `add_text` are never used
[INFO] [stdout]   --> src/posts.rs:26:8
[INFO] [stdout]    |
[INFO] [stdout] 25 | impl DraftPost {
[INFO] [stdout]    | -------------- methods in this implementation
[INFO] [stdout] 26 |     fn req_review(self) -> PendingPost {
[INFO] [stdout]    |        ^^^^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 33 |     fn add_text(&mut self, content: &str) {
[INFO] [stdout]    |        ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `PublishResult` is never used
[INFO] [stdout]   --> src/posts.rs:38:6
[INFO] [stdout]    |
[INFO] [stdout] 38 | enum PublishResult {
[INFO] [stdout]    |      ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: methods `approve`, `reject`, and `publish` are never used
[INFO] [stdout]   --> src/posts.rs:44:8
[INFO] [stdout]    |
[INFO] [stdout] 43 | impl PendingPost {
[INFO] [stdout]    | ---------------- methods in this implementation
[INFO] [stdout] 44 |     fn approve(&mut self) {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 47 |     fn reject(self) -> DraftPost {
[INFO] [stdout]    |        ^^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 50 |     fn publish(self) -> PublishResult {
[INFO] [stdout]    |        ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createUser` should have a snake case name
[INFO] [stdout]    --> src/talk.rs:123:4
[INFO] [stdout]     |
[INFO] [stdout] 123 | fn createUser(arg1 : i32, arg2 : i32) -> ConditionalValue<User> {
[INFO] [stdout]     |    ^^^^^^^^^^ help: convert the identifier to snake case: `create_user`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(non_snake_case)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createUser2` should have a snake case name
[INFO] [stdout]    --> src/talk.rs:147:4
[INFO] [stdout]     |
[INFO] [stdout] 147 | fn createUser2(arg1 : i32, arg2 : i32) -> Result<User, String> {
[INFO] [stdout]     |    ^^^^^^^^^^^ help: convert the identifier to snake case: `create_user2`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `createUser3` should have a snake case name
[INFO] [stdout]    --> src/talk.rs:174:4
[INFO] [stdout]     |
[INFO] [stdout] 174 | fn createUser3(age: i32, password : String) -> Result<User,UserCreationError> {
[INFO] [stdout]     |    ^^^^^^^^^^^ help: convert the identifier to snake case: `create_user3`
[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]   --> src/threads.rs:11:11
[INFO] [stdout]    |
[INFO] [stdout] 7  |     let handle = thread::spawn(move || {
[INFO] [stdout]    |         ------ these values have significant drop implementation and will observe changes in drop order under Edition 2024
[INFO] [stdout] ...
[INFO] [stdout] 11 |     match handle.join() {
[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; 60 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `learnrust` (bin "learnrust") due to 2 previous errors; 60 warnings emitted
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "1676ac825ebeb81a666498dfcbd245a63333fc6d96b824bacbc2c708c765b070", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1676ac825ebeb81a666498dfcbd245a63333fc6d96b824bacbc2c708c765b070", kill_on_drop: false }`
[INFO] [stdout] 1676ac825ebeb81a666498dfcbd245a63333fc6d96b824bacbc2c708c765b070