[INFO] cloning repository https://github.com/kazu-S-1110/rust_tutorial [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/kazu-S-1110/rust_tutorial" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazu-S-1110%2Frust_tutorial", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazu-S-1110%2Frust_tutorial'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 1265e6dcd2b0516199f127114b02dffd1075432a [INFO] checking kazu-S-1110/rust_tutorial against try#39605810efb1a0d52f955bfba9e4eec7a01d5deb for pr-153692 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkazu-S-1110%2Frust_tutorial" "/workspace/builds/worker-5-tc2/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-5-tc2/source'... [INFO] [stderr] done. [INFO] started tweaking git repo https://github.com/kazu-S-1110/rust_tutorial [INFO] finished tweaking git repo https://github.com/kazu-S-1110/rust_tutorial [INFO] tweaked toml for git repo https://github.com/kazu-S-1110/rust_tutorial written to /workspace/builds/worker-5-tc2/source/Cargo.toml [INFO] validating manifest of git repo https://github.com/kazu-S-1110/rust_tutorial on toolchain 39605810efb1a0d52f955bfba9e4eec7a01d5deb [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+39605810efb1a0d52f955bfba9e4eec7a01d5deb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] crate git repo https://github.com/kazu-S-1110/rust_tutorial 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" "+39605810efb1a0d52f955bfba9e4eec7a01d5deb" "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-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+39605810efb1a0d52f955bfba9e4eec7a01d5deb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 8974f621591fe3ffb00e0a4fd0bcd0e2c88cdc71371b591adab1f516b7e653b8 [INFO] running `Command { std: "docker" "start" "-a" "8974f621591fe3ffb00e0a4fd0bcd0e2c88cdc71371b591adab1f516b7e653b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "8974f621591fe3ffb00e0a4fd0bcd0e2c88cdc71371b591adab1f516b7e653b8", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8974f621591fe3ffb00e0a4fd0bcd0e2c88cdc71371b591adab1f516b7e653b8", kill_on_drop: false }` [INFO] [stdout] 8974f621591fe3ffb00e0a4fd0bcd0e2c88cdc71371b591adab1f516b7e653b8 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+39605810efb1a0d52f955bfba9e4eec7a01d5deb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 95441db44ee0912917e5a0d0064f4bb78758ab6c4fb0374395e7d5e3c5fb4dd1 [INFO] running `Command { std: "docker" "start" "-a" "95441db44ee0912917e5a0d0064f4bb78758ab6c4fb0374395e7d5e3c5fb4dd1", kill_on_drop: false }` [INFO] [stderr] Compiling anyhow v1.0.57 [INFO] [stderr] Checking rust_tutorial v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused import: `anyhow::Result` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use anyhow::Result; [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: `std::io::empty` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::empty; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::error::Error` [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::error::Error; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `DirEntry`, `File`, and `ReadDir` [INFO] [stdout] --> src/main.rs:9:25 [INFO] [stdout] | [INFO] [stdout] 9 | use std::fs::{read_dir, DirEntry, File, ReadDir}; [INFO] [stdout] | ^^^^^^^^ ^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `anyhow::Result` [INFO] [stdout] --> src/main.rs:1:5 [INFO] [stdout] | [INFO] [stdout] 1 | use anyhow::Result; [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: `std::io::prelude::*` [INFO] [stdout] --> src/main.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 10 | use std::io::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::empty` [INFO] [stdout] --> src/main.rs:2:5 [INFO] [stdout] | [INFO] [stdout] 2 | use std::io::empty; [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::error::Error` [INFO] [stdout] --> src/main.rs:8:5 [INFO] [stdout] | [INFO] [stdout] 8 | use std::error::Error; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `DirEntry`, `File`, and `ReadDir` [INFO] [stdout] --> src/main.rs:9:25 [INFO] [stdout] | [INFO] [stdout] 9 | use std::fs::{read_dir, DirEntry, File, ReadDir}; [INFO] [stdout] | ^^^^^^^^ ^^^^ ^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `std::io::prelude::*` [INFO] [stdout] --> src/main.rs:10:5 [INFO] [stdout] | [INFO] [stdout] 10 | use std::io::prelude::*; [INFO] [stdout] | ^^^^^^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Path` [INFO] [stdout] --> src/main.rs:11:17 [INFO] [stdout] | [INFO] [stdout] 11 | use std::path::{Path, PathBuf}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `fs`, `io`, and `path` [INFO] [stdout] --> src/main.rs:12:11 [INFO] [stdout] | [INFO] [stdout] 12 | use std::{fs, io, path}; [INFO] [stdout] | ^^ ^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused import: `Path` [INFO] [stdout] --> src/main.rs:11:17 [INFO] [stdout] | [INFO] [stdout] 11 | use std::path::{Path, PathBuf}; [INFO] [stdout] | ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused imports: `fs`, `io`, and `path` [INFO] [stdout] --> src/main.rs:12:11 [INFO] [stdout] | [INFO] [stdout] 12 | use std::{fs, io, path}; [INFO] [stdout] | ^^ ^^ ^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:51:21 [INFO] [stdout] | [INFO] [stdout] 51 | let mut path_ref = path.unwrap().path(); [INFO] [stdout] | ----^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> src/stack_heap/array_vector.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/main.rs:49:21 [INFO] [stdout] | [INFO] [stdout] 49 | for path in read_dir(entry) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 49 - for path in read_dir(entry) { [INFO] [stdout] 49 + while let Ok(path) = read_dir(entry) { [INFO] [stdout] | [INFO] [stdout] help: consider unwrapping the `Result` with `?` to iterate over its contents [INFO] [stdout] | [INFO] [stdout] 49 | for path in read_dir(entry)? { [INFO] [stdout] | + [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 49 - for path in read_dir(entry) { [INFO] [stdout] 49 + if let Ok(path) = read_dir(entry) { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:51:21 [INFO] [stdout] | [INFO] [stdout] 51 | let mut path_ref = path.unwrap().path(); [INFO] [stdout] | ----^^^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: function `run` is never used [INFO] [stdout] --> src/stack_heap/array_vector.rs:1:8 [INFO] [stdout] | [INFO] [stdout] 1 | pub fn run() { [INFO] [stdout] | ^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` (part of `#[warn(unused)]`) on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement [INFO] [stdout] --> src/main.rs:49:21 [INFO] [stdout] | [INFO] [stdout] 49 | for path in read_dir(entry) { [INFO] [stdout] | ^^^^^^^^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(for_loops_over_fallibles)]` on by default [INFO] [stdout] help: to check pattern in a loop use `while let` [INFO] [stdout] | [INFO] [stdout] 49 - for path in read_dir(entry) { [INFO] [stdout] 49 + while let Ok(path) = read_dir(entry) { [INFO] [stdout] | [INFO] [stdout] help: consider unwrapping the `Result` with `?` to iterate over its contents [INFO] [stdout] | [INFO] [stdout] 49 | for path in read_dir(entry)? { [INFO] [stdout] | + [INFO] [stdout] help: consider using `if let` to clear intent [INFO] [stdout] | [INFO] [stdout] 49 - for path in read_dir(entry) { [INFO] [stdout] 49 + if let Ok(path) = read_dir(entry) { [INFO] [stdout] | [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:67:5 [INFO] [stdout] | [INFO] [stdout] 67 | hoge(entry); [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] 67 | let _ = hoge(entry); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused `Result` that must be used [INFO] [stdout] --> src/main.rs:67:5 [INFO] [stdout] | [INFO] [stdout] 67 | hoge(entry); [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] 67 | let _ = hoge(entry); [INFO] [stdout] | +++++++ [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.34s [INFO] running `Command { std: "docker" "inspect" "95441db44ee0912917e5a0d0064f4bb78758ab6c4fb0374395e7d5e3c5fb4dd1", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "95441db44ee0912917e5a0d0064f4bb78758ab6c4fb0374395e7d5e3c5fb4dd1", kill_on_drop: false }` [INFO] [stdout] 95441db44ee0912917e5a0d0064f4bb78758ab6c4fb0374395e7d5e3c5fb4dd1