[INFO] cloning repository https://github.com/fffarzan/rustoc
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fffarzan/rustoc" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffffarzan%2Frustoc", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffffarzan%2Frustoc'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] afbf3f57157b45d20ab9d9cc57cbfd4563349412
[INFO] fixing fffarzan/rustoc against try#622891a4e29178280638a6b63a8908bde2c0c854+cargoflags=-Zfix-edition=start=2015 for pr-157817-2
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffffarzan%2Frustoc" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fffarzan/rustoc
[INFO] finished tweaking git repo https://github.com/fffarzan/rustoc
[INFO] tweaked toml for git repo https://github.com/fffarzan/rustoc written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fffarzan/rustoc on toolchain 622891a4e29178280638a6b63a8908bde2c0c854
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fffarzan/rustoc already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/source:/opt/rustwide/workdir:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:3a6becf2bc8dde7f3fa57ede90e4f284e72d296796fc446bbb1e2c7cc0530151" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] 996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3
[INFO] running `Command { std: "docker" "start" "996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=" "-e" "RUSTDOCFLAGS=" "-w" "/opt/rustwide/workdir" "--user" "0:0" "996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3" "/opt/rustwide/cargo-home/bin/cargo" "+622891a4e29178280638a6b63a8908bde2c0c854" "fix" "--allow-no-vcs" "--allow-dirty" "--frozen" "--all" "--all-targets" "--message-format=json" "-Zfix-edition=start=2015", kill_on_drop: false }`
[INFO] [stderr]     Checking chrono v0.4.42
[INFO] [stderr]     Checking rustoc v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `greet::*`
[INFO] [stdout]   --> src/lib/int_module/greet.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use greet::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add`
[INFO] [stdout]  --> src/lib/closure/closure.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let add = |a: i32, b: i32| -> i32 {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_add`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/lib/structure/run.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let (name, age) = ("Emma", 20);
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `age`
[INFO] [stdout]   --> src/lib/structure/run.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let (name, age) = ("Emma", 20);
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib/structure/run.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let (x, y) = coordinate();
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums_plus_one`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let nums_plus_one: Vec<_> = nums.iter().map(|num| num + 1).collect();
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nums_plus_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums_filtered`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let nums_filtered: Vec<_> = nums.iter().filter(|&&num| num <= 3).collect();
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nums_filtered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `found_three`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let found_three: Option<&i32> = nums.iter().find(|&&num| num == 3);
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_found_three`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count_nums`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let count_nums = nums.iter().count();
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_count_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_el`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let last_el: Option<&i32> = nums.iter().last(); // the type is Option because of the probablity of nums being an empty vector.
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_el`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min_el`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let min_el: Option<&i32> = nums.iter().min();
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_min_el`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_el`
[INFO] [stdout]   --> src/lib/iterator/vector.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let max_el: Option<&i32> = nums.iter().max();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_max_el`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `taked_nums`
[INFO] [stdout]   --> src/lib/iterator/vector.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let taked_nums: Vec<&i32> = nums.iter().take(3).collect();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_taked_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]   --> src/lib/option_type/run.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mark = Student {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `user_id` and `name` are never read
[INFO] [stdout]  --> src/lib/combinator/run.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 2 | struct User {
[INFO] [stdout]   |        ---- fields in this struct
[INFO] [stdout] 3 |     user_id: i32,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 4 |     name: String,
[INFO] [stdout]   |     ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `User` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Percent` is never constructed
[INFO] [stdout]  --> src/lib/control_flow/match.rs:2:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Discount {
[INFO] [stdout]   |      -------- variant in this enum
[INFO] [stdout] 2 |     Percent(i32),
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `TestEx` is never constructed
[INFO] [stdout]  --> src/lib/collection/test_exam/test_ex.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub struct TestEx {
[INFO] [stdout]   |            ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `run` is never used
[INFO] [stdout]  --> src/lib/collection/test_exam/run.rs:1:8
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub fn run() {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Right` and `Up` are never constructed
[INFO] [stdout]  --> src/lib/structure/enums.rs:3:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | pub enum Direction {
[INFO] [stdout]   |          --------- variants in this enum
[INFO] [stdout] 2 |     Left,
[INFO] [stdout] 3 |     Right,
[INFO] [stdout]   |     ^^^^^
[INFO] [stdout] 4 |     Up,
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Yellow`, `Pink`, and `Blue` are never constructed
[INFO] [stdout]   --> src/lib/structure/enums.rs:9:5
[INFO] [stdout]    |
[INFO] [stdout]  7 | pub enum Color {
[INFO] [stdout]    |          ----- variants in this enum
[INFO] [stdout]  8 |     Red,
[INFO] [stdout]  9 |     Yellow,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 10 |     Pink,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 11 |     Blue,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Sweet` is never constructed
[INFO] [stdout]   --> src/lib/structure/enums.rs:16:5
[INFO] [stdout]    |
[INFO] [stdout] 14 | pub enum Flavor {
[INFO] [stdout]    |          ------ variant in this enum
[INFO] [stdout] 15 |     Fruity,
[INFO] [stdout] 16 |     Sweet,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Admin`, `Manager`, and `User` are never constructed
[INFO] [stdout]   --> src/lib/structure/enums.rs:20:5
[INFO] [stdout]    |
[INFO] [stdout] 19 | pub enum Access {
[INFO] [stdout]    |          ------ variants in this enum
[INFO] [stdout] 20 |     Admin,
[INFO] [stdout]    |     ^^^^^
[INFO] [stdout] 21 |     Manager,
[INFO] [stdout]    |     ^^^^^^^
[INFO] [stdout] 22 |     User,
[INFO] [stdout]    |     ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Manager` and `Supervisor` are never constructed
[INFO] [stdout]  --> src/lib/derive/run.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 3 | enum Position {
[INFO] [stdout]   |      -------- variants in this enum
[INFO] [stdout] 4 |     Manager, 
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout] 5 |     Supervisor,
[INFO] [stdout]   |     ^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Position` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `position` and `work_hours` are never read
[INFO] [stdout]   --> src/lib/derive/run.rs:11:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | struct Employee {
[INFO] [stdout]    |        -------- fields in this struct
[INFO] [stdout] 11 |     position: Position,
[INFO] [stdout]    |     ^^^^^^^^
[INFO] [stdout] 12 |     work_hours: i64,
[INFO] [stdout]    |     ^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Employee` has derived impls for the traits `Clone` and `Debug`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `content` is never read
[INFO] [stdout]  --> src/lib/hashmap/run.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | struct Contents {
[INFO] [stdout]   |        -------- field in this struct
[INFO] [stdout] 5 |     content: String,
[INFO] [stdout]   |     ^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Contents` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `goodbye` is never used
[INFO] [stdout]  --> src/lib/int_module/greet.rs:6:12
[INFO] [stdout]   |
[INFO] [stdout] 6 |     pub fn goodbye() {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `all_caps` is never used
[INFO] [stdout]   --> src/lib/int_module/msg.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn all_caps(word: &str) -> String {
[INFO] [stdout]    |    ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `q3` is never read
[INFO] [stdout]  --> src/lib/option_type/run.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | struct Survey {
[INFO] [stdout]   |        ------ field in this struct
[INFO] [stdout] ...
[INFO] [stdout] 4 |     q3: Option<String>
[INFO] [stdout]   |     ^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Maintenance`, `Marketing`, `LineSupervisor`, `KitchenStaff`, and `AssemblyTechnician` are never constructed
[INFO] [stdout]   --> src/lib/result_type/run.rs:41:5
[INFO] [stdout]    |
[INFO] [stdout] 40 | enum EmployeePosition {
[INFO] [stdout]    |      ---------------- variants in this enum
[INFO] [stdout] 41 |     Maintenance,
[INFO] [stdout]    |     ^^^^^^^^^^^
[INFO] [stdout] 42 |     Marketing,
[INFO] [stdout]    |     ^^^^^^^^^
[INFO] [stdout] 43 |     Manager,
[INFO] [stdout] 44 |     LineSupervisor,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^
[INFO] [stdout] 45 |     KitchenStaff,
[INFO] [stdout]    |     ^^^^^^^^^^^^
[INFO] [stdout] 46 |     AssemblyTechnician,
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Active` is never constructed
[INFO] [stdout]   --> src/lib/result_type/run.rs:50:5
[INFO] [stdout]    |
[INFO] [stdout] 49 | enum EmployeeStatus {
[INFO] [stdout]    |      -------------- variant in this enum
[INFO] [stdout] 50 |     Active,
[INFO] [stdout]    |     ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Color` is never used
[INFO] [stdout]  --> src/lib/some/run.rs:1:6
[INFO] [stdout]   |
[INFO] [stdout] 1 | enum Color {
[INFO] [stdout]   |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> src/lib/result_type/run.rs:80:5
[INFO] [stdout]    |
[INFO] [stdout] 80 |     pick_choice("mm");
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: use `let _ = ...` to ignore the resulting value
[INFO] [stdout]    |
[INFO] [stdout] 80 |     let _ = pick_choice("mm");
[INFO] [stdout]    |     +++++++
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0425]: cannot find function `all_caps` in this scope
[INFO] [stdout]   --> src/lib/int_module/msg.rs:25:22
[INFO] [stdout]    |
[INFO] [stdout] 25 |         let result = all_caps("test");
[INFO] [stdout]    |                      ^^^^^^^^ not found in this scope
[INFO] [stdout]    |
[INFO] [stdout] help: consider importing this function
[INFO] [stdout]    |
[INFO] [stdout] 21 +     use crate::int_module::msg::all_caps;
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `greet::*`
[INFO] [stdout]   --> src/lib/int_module/greet.rs:12:9
[INFO] [stdout]    |
[INFO] [stdout] 12 |     use greet::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `crate::*`
[INFO] [stdout]   --> src/lib/int_module/msg.rs:21:9
[INFO] [stdout]    |
[INFO] [stdout] 21 |     use crate::*;
[INFO] [stdout]    |         ^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `add`
[INFO] [stdout]  --> src/lib/closure/closure.rs:2:9
[INFO] [stdout]   |
[INFO] [stdout] 2 |     let add = |a: i32, b: i32| -> i32 {
[INFO] [stdout]   |         ^^^ help: if this is intentional, prefix it with an underscore: `_add`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `name`
[INFO] [stdout]   --> src/lib/structure/run.rs:37:10
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let (name, age) = ("Emma", 20);
[INFO] [stdout]    |          ^^^^ help: if this is intentional, prefix it with an underscore: `_name`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `age`
[INFO] [stdout]   --> src/lib/structure/run.rs:37:16
[INFO] [stdout]    |
[INFO] [stdout] 37 |     let (name, age) = ("Emma", 20);
[INFO] [stdout]    |                ^^^ help: if this is intentional, prefix it with an underscore: `_age`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `x`
[INFO] [stdout]   --> src/lib/structure/run.rs:39:10
[INFO] [stdout]    |
[INFO] [stdout] 39 |     let (x, y) = coordinate();
[INFO] [stdout]    |          ^ help: if this is intentional, prefix it with an underscore: `_x`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums_plus_one`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:4:9
[INFO] [stdout]   |
[INFO] [stdout] 4 |     let nums_plus_one: Vec<_> = nums.iter().map(|num| num + 1).collect();
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nums_plus_one`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `nums_filtered`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 5 |     let nums_filtered: Vec<_> = nums.iter().filter(|&&num| num <= 3).collect();
[INFO] [stdout]   |         ^^^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_nums_filtered`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `found_three`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:6:9
[INFO] [stdout]   |
[INFO] [stdout] 6 |     let found_three: Option<&i32> = nums.iter().find(|&&num| num == 3);
[INFO] [stdout]   |         ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_found_three`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `count_nums`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:7:9
[INFO] [stdout]   |
[INFO] [stdout] 7 |     let count_nums = nums.iter().count();
[INFO] [stdout]   |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_count_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `last_el`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:8:9
[INFO] [stdout]   |
[INFO] [stdout] 8 |     let last_el: Option<&i32> = nums.iter().last(); // the type is Option because of the probablity of nums being an empty vector.
[INFO] [stdout]   |         ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_last_el`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `min_el`
[INFO] [stdout]  --> src/lib/iterator/vector.rs:9:9
[INFO] [stdout]   |
[INFO] [stdout] 9 |     let min_el: Option<&i32> = nums.iter().min();
[INFO] [stdout]   |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_min_el`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `max_el`
[INFO] [stdout]   --> src/lib/iterator/vector.rs:10:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     let max_el: Option<&i32> = nums.iter().max();
[INFO] [stdout]    |         ^^^^^^ help: if this is intentional, prefix it with an underscore: `_max_el`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `taked_nums`
[INFO] [stdout]   --> src/lib/iterator/vector.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 11 |     let taked_nums: Vec<&i32> = nums.iter().take(3).collect();
[INFO] [stdout]    |         ^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_taked_nums`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `mark`
[INFO] [stdout]   --> src/lib/option_type/run.rs:30:9
[INFO] [stdout]    |
[INFO] [stdout] 30 |     let mark = Student {
[INFO] [stdout]    |         ^^^^ help: if this is intentional, prefix it with an underscore: `_mark`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0425`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `rustoc` (lib test) due to 1 previous error; 15 warnings emitted
[INFO] running `Command { std: "docker" "inspect" "996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3", kill_on_drop: false }`
[INFO] [stdout] 996a8c4b8c7851290ab0da49c6013970234724e2ec785f093741f97127e2c5c3
