[INFO] cloning repository https://github.com/dayo05/study-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dayo05/study-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdayo05%2Fstudy-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdayo05%2Fstudy-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3e0bcf5cb398f38509f6df56ada1425783debb2d
[INFO] checking dayo05/study-rs against try#9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840 for pr-149518
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdayo05%2Fstudy-rs" "/workspace/builds/worker-2-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc2/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/dayo05/study-rs
[INFO] finished tweaking git repo https://github.com/dayo05/study-rs
[INFO] tweaked toml for git repo https://github.com/dayo05/study-rs written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/dayo05/study-rs on toolchain 9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/dayo05/study-rs 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" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "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-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 0a580d143c3969e1a0bb662404a8f0eb9ddcdbb06d17ffb6fdb399f583e0a5c5
[INFO] running `Command { std: "docker" "start" "-a" "0a580d143c3969e1a0bb662404a8f0eb9ddcdbb06d17ffb6fdb399f583e0a5c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "0a580d143c3969e1a0bb662404a8f0eb9ddcdbb06d17ffb6fdb399f583e0a5c5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "0a580d143c3969e1a0bb662404a8f0eb9ddcdbb06d17ffb6fdb399f583e0a5c5", kill_on_drop: false }`
[INFO] [stdout] 0a580d143c3969e1a0bb662404a8f0eb9ddcdbb06d17ffb6fdb399f583e0a5c5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-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" "-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@sha256:94a0c148923f5b2b52a63ef0eeb1882ad339ab61bce784c8077cbe41c61feb6c" "/opt/rustwide/cargo-home/bin/cargo" "+9b8307bcb9d1de8ffc7e1c81c48efffdb24ee840" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ca23ee8b30a108378d021e2e54c2e3c99e397bdec5bc40d504e7677772bddc9d
[INFO] running `Command { std: "docker" "start" "-a" "ca23ee8b30a108378d021e2e54c2e3c99e397bdec5bc40d504e7677772bddc9d", kill_on_drop: false }`
[INFO] [stderr]     Checking study-rs v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/day2/eval.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 46 |             if (right_calc == 0) {
[INFO] [stdout]    |                ^               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 46 -             if (right_calc == 0) {
[INFO] [stdout] 46 +             if right_calc == 0 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary parentheses around `if` condition
[INFO] [stdout]   --> src/day2/eval.rs:46:16
[INFO] [stdout]    |
[INFO] [stdout] 46 |             if (right_calc == 0) {
[INFO] [stdout]    |                ^               ^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_parens)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: remove these parentheses
[INFO] [stdout]    |
[INFO] [stdout] 46 -             if (right_calc == 0) {
[INFO] [stdout] 46 +             if right_calc == 0 {
[INFO] [stdout]    |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/day1/elevator.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Arrived(i32),
[INFO] [stdout]   |     ------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -     Arrived(i32),
[INFO] [stdout] 3 +     Arrived(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/day1/elevator.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 |     DoorUpdate(bool),
[INFO] [stdout]   |     ---------- ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     DoorUpdate(bool),
[INFO] [stdout] 4 +     DoorUpdate(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/day1/elevator.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 |     PressFloorButton(i32),
[INFO] [stdout]   |     ---------------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     PressFloorButton(i32),
[INFO] [stdout] 5 +     PressFloorButton(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/day1/elevator.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     PressDirectionButton(i32, Direction),
[INFO] [stdout]   |     -------------------- ^^^  ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[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] 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] 6 -     PressDirectionButton(i32, Direction),
[INFO] [stdout] 6 +     PressDirectionButton((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Down` is never constructed
[INFO] [stdout]   --> src/day1/elevator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Direction {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 11 |     Up,
[INFO] [stdout] 12 |     Down,
[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: enum `Operation` is never used
[INFO] [stdout]  --> src/day2/eval.rs:2:10
[INFO] [stdout]   |
[INFO] [stdout] 2 | pub enum Operation {
[INFO] [stdout]   |          ^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: enum `Expression` is never used
[INFO] [stdout]   --> src/day2/eval.rs:11:10
[INFO] [stdout]    |
[INFO] [stdout] 11 | pub enum Expression {
[INFO] [stdout]    |          ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `eval` is never used
[INFO] [stdout]   --> src/day2/eval.rs:23:8
[INFO] [stdout]    |
[INFO] [stdout] 23 | pub fn eval(e: Expression) -> Result<i64, String> {
[INFO] [stdout]    |        ^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: trait `Logger` is never used
[INFO] [stdout]  --> src/day2/logging.rs:3:11
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub trait Logger {
[INFO] [stdout]   |           ^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StderrLogger` is never constructed
[INFO] [stdout]  --> src/day2/logging.rs:8:12
[INFO] [stdout]   |
[INFO] [stdout] 8 | pub struct StderrLogger;
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `VerbosityFilter` is never constructed
[INFO] [stdout]   --> src/day2/logging.rs:16:12
[INFO] [stdout]    |
[INFO] [stdout] 16 | pub struct VerbosityFilter {
[INFO] [stdout]    |            ^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated function `new` is never used
[INFO] [stdout]   --> src/day2/logging.rs:22:19
[INFO] [stdout]    |
[INFO] [stdout] 21 | impl VerbosityFilter {
[INFO] [stdout]    | -------------------- associated function in this implementation
[INFO] [stdout] 22 |     pub(crate) fn new(max_verbosity: u8, logger: Box<dyn Logger>) -> Self {
[INFO] [stdout]    |                   ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `StdoutLogger` is never constructed
[INFO] [stdout]   --> src/day2/logging.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct StdoutLogger;
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function `min` is never used
[INFO] [stdout]  --> src/day2/min.rs:4:8
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub fn min<T: Ord>(v1: T, v2: T) -> T {
[INFO] [stdout]   |        ^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `Counter` is never constructed
[INFO] [stdout]  --> src/day2/counter.rs:4:12
[INFO] [stdout]   |
[INFO] [stdout] 4 | pub struct Counter<T: Hash + Eq> {
[INFO] [stdout]   |            ^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: associated items `new`, `count`, and `times_seen` are never used
[INFO] [stdout]   --> src/day2/counter.rs:10:12
[INFO] [stdout]    |
[INFO] [stdout]  8 | impl<T: Hash + Eq> Counter<T> {
[INFO] [stdout]    | ----------------------------- associated items in this implementation
[INFO] [stdout]  9 |     /// 새 Counter를 만듭니다.
[INFO] [stdout] 10 |     pub fn new() -> Self {
[INFO] [stdout]    |            ^^^
[INFO] [stdout] ...
[INFO] [stdout] 17 |     pub fn count(&mut self, value: T) {
[INFO] [stdout]    |            ^^^^^
[INFO] [stdout] ...
[INFO] [stdout] 26 |     pub fn times_seen(&self, value: T) -> u64 {
[INFO] [stdout]    |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: struct `RotDecoder` is never constructed
[INFO] [stdout]  --> src/day2/rot13.rs:3:12
[INFO] [stdout]   |
[INFO] [stdout] 3 | pub struct RotDecoder<R: Read> {
[INFO] [stdout]   |            ^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/day1/elevator.rs:3:13
[INFO] [stdout]   |
[INFO] [stdout] 3 |     Arrived(i32),
[INFO] [stdout]   |     ------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[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)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 3 -     Arrived(i32),
[INFO] [stdout] 3 +     Arrived(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/day1/elevator.rs:4:16
[INFO] [stdout]   |
[INFO] [stdout] 4 |     DoorUpdate(bool),
[INFO] [stdout]   |     ---------- ^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 4 -     DoorUpdate(bool),
[INFO] [stdout] 4 +     DoorUpdate(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: field `0` is never read
[INFO] [stdout]  --> src/day1/elevator.rs:5:22
[INFO] [stdout]   |
[INFO] [stdout] 5 |     PressFloorButton(i32),
[INFO] [stdout]   |     ---------------- ^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     field in this variant
[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] help: consider changing the field to be of unit type to suppress this warning while preserving the field numbering, or remove the field
[INFO] [stdout]   |
[INFO] [stdout] 5 -     PressFloorButton(i32),
[INFO] [stdout] 5 +     PressFloorButton(()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: fields `0` and `1` are never read
[INFO] [stdout]  --> src/day1/elevator.rs:6:26
[INFO] [stdout]   |
[INFO] [stdout] 6 |     PressDirectionButton(i32, Direction),
[INFO] [stdout]   |     -------------------- ^^^  ^^^^^^^^^
[INFO] [stdout]   |     |
[INFO] [stdout]   |     fields in this variant
[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] 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] 6 -     PressDirectionButton(i32, Direction),
[INFO] [stdout] 6 +     PressDirectionButton((), ()),
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variant `Down` is never constructed
[INFO] [stdout]   --> src/day1/elevator.rs:12:5
[INFO] [stdout]    |
[INFO] [stdout] 10 | pub enum Direction {
[INFO] [stdout]    |          --------- variant in this enum
[INFO] [stdout] 11 |     Up,
[INFO] [stdout] 12 |     Down,
[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: struct `StdoutLogger` is never constructed
[INFO] [stdout]   --> src/day2/logging.rs:35:12
[INFO] [stdout]    |
[INFO] [stdout] 35 | pub struct StdoutLogger;
[INFO] [stdout]    |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `EvalTest` should have a snake case name
[INFO] [stdout]  --> src/day2.rs:8:5
[INFO] [stdout]   |
[INFO] [stdout] 8 | mod EvalTest {
[INFO] [stdout]   |     ^^^^^^^^ help: convert the identifier to snake case: `eval_test`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(non_snake_case)]` (part of `#[warn(nonstandard_style)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `LoggingTest` should have a snake case name
[INFO] [stdout]   --> src/day2.rs:67:5
[INFO] [stdout]    |
[INFO] [stdout] 67 | mod LoggingTest {
[INFO] [stdout]    |     ^^^^^^^^^^^ help: convert the identifier to snake case: `logging_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `MinTest` should have a snake case name
[INFO] [stdout]   --> src/day2.rs:79:5
[INFO] [stdout]    |
[INFO] [stdout] 79 | mod MinTest {
[INFO] [stdout]    |     ^^^^^^^ help: convert the identifier to snake case: `min_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: module `CounterTest` should have a snake case name
[INFO] [stdout]   --> src/day2.rs:95:5
[INFO] [stdout]    |
[INFO] [stdout] 95 | mod CounterTest {
[INFO] [stdout]    |     ^^^^^^^^^^^ help: convert the identifier to snake case: `counter_test`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.10s
[INFO] running `Command { std: "docker" "inspect" "ca23ee8b30a108378d021e2e54c2e3c99e397bdec5bc40d504e7677772bddc9d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ca23ee8b30a108378d021e2e54c2e3c99e397bdec5bc40d504e7677772bddc9d", kill_on_drop: false }`
[INFO] [stdout] ca23ee8b30a108378d021e2e54c2e3c99e397bdec5bc40d504e7677772bddc9d