[INFO] cloning repository https://github.com/sanao1006/ruststudy
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/sanao1006/ruststudy" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsanao1006%2Fruststudy", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsanao1006%2Fruststudy'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5590b0bfdfcd73cf5cd4e2c9c3e23158e15b3820
[INFO] checking sanao1006/ruststudy against master#9bfa31f632912180dc742809bcc51a97f2d7079d for pr-140151
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsanao1006%2Fruststudy" "/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/sanao1006/ruststudy on toolchain 9bfa31f632912180dc742809bcc51a97f2d7079d
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9bfa31f632912180dc742809bcc51a97f2d7079d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/sanao1006/ruststudy
[INFO] finished tweaking git repo https://github.com/sanao1006/ruststudy
[INFO] tweaked toml for git repo https://github.com/sanao1006/ruststudy written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/sanao1006/ruststudy 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" "+9bfa31f632912180dc742809bcc51a97f2d7079d" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+9bfa31f632912180dc742809bcc51a97f2d7079d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a839615f1c5c036a0861c92f81e5629e0e965761ffe507471eec5c2dd4e61fa
[INFO] running `Command { std: "docker" "start" "-a" "0a839615f1c5c036a0861c92f81e5629e0e965761ffe507471eec5c2dd4e61fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a839615f1c5c036a0861c92f81e5629e0e965761ffe507471eec5c2dd4e61fa", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a839615f1c5c036a0861c92f81e5629e0e965761ffe507471eec5c2dd4e61fa", kill_on_drop: false }`
[INFO] [stdout] 0a839615f1c5c036a0861c92f81e5629e0e965761ffe507471eec5c2dd4e61fa
[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:b0b074c097205a61b89e8ad263052f976b2b332c4dc5f02aef1fe52501660d6e" "/opt/rustwide/cargo-home/bin/cargo" "+9bfa31f632912180dc742809bcc51a97f2d7079d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f38b1b58c79c201729f4b672fd0504d7eaf3e7c9a12f37d3dc379fd1315346d2
[INFO] running `Command { std: "docker" "start" "-a" "f38b1b58c79c201729f4b672fd0504d7eaf3e7c9a12f37d3dc379fd1315346d2", kill_on_drop: false }`
[INFO] [stderr]     Checking ruststudy v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `StderrLogger`, `VerbosityFilter`, and `do_things`
[INFO] [stdout]  --> src/main.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chap13::{do_things, StderrLogger, VerbosityFilter};
[INFO] [stdout]   |              ^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused import: `std::time::Duration`
[INFO] [stdout]  --> src/main.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use std::time::Duration;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `StderrLogger`, `VerbosityFilter`, and `do_things`
[INFO] [stdout]  --> src/main.rs:3:14
[INFO] [stdout]   |
[INFO] [stdout] 3 | use chap13::{do_things, StderrLogger, VerbosityFilter};
[INFO] [stdout]   |              ^^^^^^^^^  ^^^^^^^^^^^^  ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> src/chap13.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let len = message.to_string().len();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `len`
[INFO] [stdout]   --> src/chap13.rs:23:13
[INFO] [stdout]    |
[INFO] [stdout] 23 |         let len = message.to_string().len();
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_len`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Button` is more private than the item `Event::ButtonPressed::0`
[INFO] [stdout]   --> src/chap10.rs:8:19
[INFO] [stdout]    |
[INFO] [stdout] 8  |     ButtonPressed(Button)
[INFO] [stdout]    |                   ^^^^^^ field `Event::ButtonPressed::0` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Button` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/chap10.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Button {
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Event` is never used
[INFO] [stdout]  --> src/chap10.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Event {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Event` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Button` is never used
[INFO] [stdout]   --> src/chap10.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Button {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Floor` is never used
[INFO] [stdout]   --> src/chap10.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | type Floor = i32;
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]   --> src/chap10.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub enum Direction {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Direction` 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 `car_arrived` is never used
[INFO] [stdout]   --> src/chap10.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn car_arrived(floor: i32) -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `car_door_opened` is never used
[INFO] [stdout]   --> src/chap10.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn car_door_opened() -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `car_door_closed` is never used
[INFO] [stdout]   --> src/chap10.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn car_door_closed() -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lobby_call_button_pressed` is never used
[INFO] [stdout]   --> src/chap10.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn lobby_call_button_pressed(floor: i32, dir: Direction) -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `car_floor_button_pressed` is never used
[INFO] [stdout]   --> src/chap10.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn car_floor_button_pressed(floor: i32) -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Operation` is never used
[INFO] [stdout]  --> src/chap12.rs:2:6
[INFO] [stdout]   |
[INFO] [stdout] 2 | enum Operation {
[INFO] [stdout]   |      ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]   --> src/chap12.rs:10:6
[INFO] [stdout]    |
[INFO] [stdout] 10 | enum Expression {
[INFO] [stdout]    |      ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]   --> src/chap12.rs:19:4
[INFO] [stdout]    |
[INFO] [stdout] 19 | fn eval(e: Expression) -> Result<i64, String> {
[INFO] [stdout]    |    ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_things` is never used
[INFO] [stdout]   --> src/chap13.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn do_things(logger: &impl Logger) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]  --> src/chap19.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub enum Language {
[INFO] [stdout]   |              -------- variants in this enum
[INFO] [stdout] 4 |         Rust,
[INFO] [stdout] 5 |         Java,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 6 |         Perl,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Language` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `version_expression` are never read
[INFO] [stdout]   --> src/chap19.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub struct Dependency {
[INFO] [stdout]    |                ---------- fields in this struct
[INFO] [stdout] 11 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 12 |         version_expression: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type `Button` is more private than the item `Event::ButtonPressed::0`
[INFO] [stdout]   --> src/chap10.rs:8:19
[INFO] [stdout]    |
[INFO] [stdout] 8  |     ButtonPressed(Button)
[INFO] [stdout]    |                   ^^^^^^ field `Event::ButtonPressed::0` is reachable at visibility `pub(crate)`
[INFO] [stdout]    |
[INFO] [stdout] note: but type `Button` is only usable at visibility `pub(self)`
[INFO] [stdout]   --> src/chap10.rs:12:1
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Button {
[INFO] [stdout]    | ^^^^^^^^^^^
[INFO] [stdout]    = note: `#[warn(private_interfaces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Event` is never used
[INFO] [stdout]  --> src/chap10.rs:4:10
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub enum Event {
[INFO] [stdout]   |          ^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Event` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout]   = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Button` is never used
[INFO] [stdout]   --> src/chap10.rs:12:6
[INFO] [stdout]    |
[INFO] [stdout] 12 | enum Button {
[INFO] [stdout]    |      ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: type alias `Floor` is never used
[INFO] [stdout]   --> src/chap10.rs:17:6
[INFO] [stdout]    |
[INFO] [stdout] 17 | type Floor = i32;
[INFO] [stdout]    |      ^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Direction` is never used
[INFO] [stdout]   --> src/chap10.rs:21:10
[INFO] [stdout]    |
[INFO] [stdout] 21 | pub enum Direction {
[INFO] [stdout]    |          ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Direction` 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 `car_arrived` is never used
[INFO] [stdout]   --> src/chap10.rs:27:8
[INFO] [stdout]    |
[INFO] [stdout] 27 | pub fn car_arrived(floor: i32) -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `car_door_opened` is never used
[INFO] [stdout]   --> src/chap10.rs:32:8
[INFO] [stdout]    |
[INFO] [stdout] 32 | pub fn car_door_opened() -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `car_door_closed` is never used
[INFO] [stdout]   --> src/chap10.rs:37:8
[INFO] [stdout]    |
[INFO] [stdout] 37 | pub fn car_door_closed() -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `lobby_call_button_pressed` is never used
[INFO] [stdout]   --> src/chap10.rs:42:8
[INFO] [stdout]    |
[INFO] [stdout] 42 | pub fn lobby_call_button_pressed(floor: i32, dir: Direction) -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `car_floor_button_pressed` is never used
[INFO] [stdout]   --> src/chap10.rs:47:8
[INFO] [stdout]    |
[INFO] [stdout] 47 | pub fn car_floor_button_pressed(floor: i32) -> Event {
[INFO] [stdout]    |        ^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `do_things` is never used
[INFO] [stdout]   --> src/chap13.rs:30:8
[INFO] [stdout]    |
[INFO] [stdout] 30 | pub fn do_things(logger: &impl Logger) {
[INFO] [stdout]    |        ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variants `Java` and `Perl` are never constructed
[INFO] [stdout]  --> src/chap19.rs:5:9
[INFO] [stdout]   |
[INFO] [stdout] 3 |     pub enum Language {
[INFO] [stdout]   |              -------- variants in this enum
[INFO] [stdout] 4 |         Rust,
[INFO] [stdout] 5 |         Java,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout] 6 |         Perl,
[INFO] [stdout]   |         ^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `Language` has a derived impl for the trait `Debug`, but this is intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `name` and `version_expression` are never read
[INFO] [stdout]   --> src/chap19.rs:11:9
[INFO] [stdout]    |
[INFO] [stdout] 10 |     pub struct Dependency {
[INFO] [stdout]    |                ---------- fields in this struct
[INFO] [stdout] 11 |         name: String,
[INFO] [stdout]    |         ^^^^
[INFO] [stdout] 12 |         version_expression: String,
[INFO] [stdout]    |         ^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `Dependency` has derived impls for the traits `Debug` and `Clone`, but these are intentionally ignored during dead code analysis
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.13s
[INFO] running `Command { std: "docker" "inspect" "f38b1b58c79c201729f4b672fd0504d7eaf3e7c9a12f37d3dc379fd1315346d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f38b1b58c79c201729f4b672fd0504d7eaf3e7c9a12f37d3dc379fd1315346d2", kill_on_drop: false }`
[INFO] [stdout] f38b1b58c79c201729f4b672fd0504d7eaf3e7c9a12f37d3dc379fd1315346d2