[INFO] cloning repository https://github.com/simon-an/coding-kata-word-chain-rs [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/simon-an/coding-kata-word-chain-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-an%2Fcoding-kata-word-chain-rs", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-an%2Fcoding-kata-word-chain-rs'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 73fa81f3427029a133085c428da82e8d90ba6875 [INFO] checking simon-an/coding-kata-word-chain-rs against master#8f359beca4e58bc3ae795a666301a8f47023044c for pr-121545 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-an%2Fcoding-kata-word-chain-rs" "/workspace/builds/worker-2-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-2-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/simon-an/coding-kata-word-chain-rs on toolchain 8f359beca4e58bc3ae795a666301a8f47023044c [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8f359beca4e58bc3ae795a666301a8f47023044c" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/simon-an/coding-kata-word-chain-rs [INFO] finished tweaking git repo https://github.com/simon-an/coding-kata-word-chain-rs [INFO] tweaked toml for git repo https://github.com/simon-an/coding-kata-word-chain-rs written to /workspace/builds/worker-2-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/simon-an/coding-kata-word-chain-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" "+8f359beca4e58bc3ae795a666301a8f47023044c" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [ERROR] this task or one of its parent failed! [ERROR] no output for 300 seconds [ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace. [INFO] checking simon-an/coding-kata-word-chain-rs against try#7ee76453dd3eae6de6c1351f26482bed63b01beb for pr-121545 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-an%2Fcoding-kata-word-chain-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] validating manifest of git repo https://github.com/simon-an/coding-kata-word-chain-rs on toolchain 7ee76453dd3eae6de6c1351f26482bed63b01beb [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7ee76453dd3eae6de6c1351f26482bed63b01beb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/simon-an/coding-kata-word-chain-rs [INFO] finished tweaking git repo https://github.com/simon-an/coding-kata-word-chain-rs [INFO] tweaked toml for git repo https://github.com/simon-an/coding-kata-word-chain-rs written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/simon-an/coding-kata-word-chain-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" "+7ee76453dd3eae6de6c1351f26482bed63b01beb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] [stderr] Blocking waiting for file lock on package cache [INFO] [stderr] Updating crates.io index [INFO] [stderr] Blocking waiting for file lock on package cache [ERROR] error running command: no output for 300 seconds [INFO] checking simon-an/coding-kata-word-chain-rs against try#7ee76453dd3eae6de6c1351f26482bed63b01beb for pr-121545 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fsimon-an%2Fcoding-kata-word-chain-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] validating manifest of git repo https://github.com/simon-an/coding-kata-word-chain-rs on toolchain 7ee76453dd3eae6de6c1351f26482bed63b01beb [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+7ee76453dd3eae6de6c1351f26482bed63b01beb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/simon-an/coding-kata-word-chain-rs [INFO] finished tweaking git repo https://github.com/simon-an/coding-kata-word-chain-rs [INFO] tweaked toml for git repo https://github.com/simon-an/coding-kata-word-chain-rs written to /workspace/builds/worker-2-tc2/source/Cargo.toml [INFO] crate git repo https://github.com/simon-an/coding-kata-word-chain-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" "+7ee76453dd3eae6de6c1351f26482bed63b01beb" "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] [stderr] Downloading crates ... [INFO] [stderr] Downloaded newline-converter v0.2.0 [INFO] [stderr] Downloaded os_str_bytes v4.2.0 [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7ee76453dd3eae6de6c1351f26482bed63b01beb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] 45614f1b43b39b704cbc2b29274d80538965ba40e449f1789736dcb91bdabd1b [INFO] running `Command { std: "docker" "start" "-a" "45614f1b43b39b704cbc2b29274d80538965ba40e449f1789736dcb91bdabd1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "45614f1b43b39b704cbc2b29274d80538965ba40e449f1789736dcb91bdabd1b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "45614f1b43b39b704cbc2b29274d80538965ba40e449f1789736dcb91bdabd1b", kill_on_drop: false }` [INFO] [stdout] 45614f1b43b39b704cbc2b29274d80538965ba40e449f1789736dcb91bdabd1b [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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+7ee76453dd3eae6de6c1351f26482bed63b01beb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 13cf70590d0d57fba1736c8e803c94a97370feda024ffa996780702ce93dcc5b [INFO] running `Command { std: "docker" "start" "-a" "13cf70590d0d57fba1736c8e803c94a97370feda024ffa996780702ce93dcc5b", kill_on_drop: false }` [INFO] [stderr] Compiling version_check v0.9.3 [INFO] [stderr] Compiling proc-macro2 v1.0.32 [INFO] [stderr] Compiling syn v1.0.82 [INFO] [stderr] Compiling libc v0.2.108 [INFO] [stderr] Compiling autocfg v1.0.1 [INFO] [stderr] Compiling unicode-segmentation v1.8.0 [INFO] [stderr] Checking unicode-width v0.1.9 [INFO] [stderr] Checking hashbrown v0.11.2 [INFO] [stderr] Checking bitflags v1.3.2 [INFO] [stderr] Checking lazy_static v1.4.0 [INFO] [stderr] Checking strsim v0.10.0 [INFO] [stderr] Checking termcolor v1.1.2 [INFO] [stderr] Checking newline-converter v0.2.0 [INFO] [stderr] Checking os_str_bytes v4.2.0 [INFO] [stderr] Checking textwrap v0.14.2 [INFO] [stderr] Compiling proc-macro-error-attr v1.0.4 [INFO] [stderr] Compiling proc-macro-error v1.0.4 [INFO] [stderr] Compiling unicase v2.6.0 [INFO] [stderr] Compiling indexmap v1.7.0 [INFO] [stderr] Compiling heck v0.3.3 [INFO] [stderr] Compiling quote v1.0.10 [INFO] [stderr] Checking atty v0.2.14 [INFO] [stderr] Compiling clap_derive v3.0.0-beta.5 [INFO] [stderr] Checking clap v3.0.0-beta.5 [INFO] [stderr] Checking wordchain v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `start` [INFO] [stdout] --> src/main.rs:44:21 [INFO] [stdout] | [INFO] [stdout] 44 | fn solve(&self, start: &str, end: &str) -> Result, &'static str> { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_start` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `end` [INFO] [stdout] --> src/main.rs:44:34 [INFO] [stdout] | [INFO] [stdout] 44 | fn solve(&self, start: &str, end: &str) -> Result, &'static str> { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_end` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:47:13 [INFO] [stdout] | [INFO] [stdout] 47 | let mut result: Vec = vec![]; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `results` [INFO] [stdout] --> src/main.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | results: &Vec, [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_results` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `end` [INFO] [stdout] --> src/main.rs:55:9 [INFO] [stdout] | [INFO] [stdout] 55 | end: &str, [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_end` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `len` [INFO] [stdout] --> src/main.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 56 | len: usize, [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_len` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `blacklist` [INFO] [stdout] --> src/main.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | blacklist: &Vec, [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_blacklist` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `wordlist` is never read [INFO] [stdout] --> src/main.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 32 | struct Solver { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 33 | wordlist: Vec, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: method `find_next_word` is never used [INFO] [stdout] --> src/main.rs:52:8 [INFO] [stdout] | [INFO] [stdout] 43 | impl Solver { [INFO] [stdout] | ----------- method in this implementation [INFO] [stdout] ... [INFO] [stdout] 52 | fn find_next_word( [INFO] [stdout] | ^^^^^^^^^^^^^^ [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 9 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `start` [INFO] [stdout] --> src/main.rs:44:21 [INFO] [stdout] | [INFO] [stdout] 44 | fn solve(&self, start: &str, end: &str) -> Result, &'static str> { [INFO] [stdout] | ^^^^^ help: if this is intentional, prefix it with an underscore: `_start` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `end` [INFO] [stdout] --> src/main.rs:44:34 [INFO] [stdout] | [INFO] [stdout] 44 | fn solve(&self, start: &str, end: &str) -> Result, &'static str> { [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_end` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:47:13 [INFO] [stdout] | [INFO] [stdout] 47 | let mut result: Vec = vec![]; [INFO] [stdout] | ----^^^^^^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `results` [INFO] [stdout] --> src/main.rs:54:9 [INFO] [stdout] | [INFO] [stdout] 54 | results: &Vec, [INFO] [stdout] | ^^^^^^^ help: if this is intentional, prefix it with an underscore: `_results` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `end` [INFO] [stdout] --> src/main.rs:55:9 [INFO] [stdout] | [INFO] [stdout] 55 | end: &str, [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_end` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `len` [INFO] [stdout] --> src/main.rs:56:9 [INFO] [stdout] | [INFO] [stdout] 56 | len: usize, [INFO] [stdout] | ^^^ help: if this is intentional, prefix it with an underscore: `_len` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `blacklist` [INFO] [stdout] --> src/main.rs:57:9 [INFO] [stdout] | [INFO] [stdout] 57 | blacklist: &Vec, [INFO] [stdout] | ^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_blacklist` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: field `wordlist` is never read [INFO] [stdout] --> src/main.rs:33:5 [INFO] [stdout] | [INFO] [stdout] 32 | struct Solver { [INFO] [stdout] | ------ field in this struct [INFO] [stdout] 33 | wordlist: Vec, [INFO] [stdout] | ^^^^^^^^ [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(dead_code)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: 8 warnings emitted [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 9.00s [INFO] running `Command { std: "docker" "inspect" "13cf70590d0d57fba1736c8e803c94a97370feda024ffa996780702ce93dcc5b", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "13cf70590d0d57fba1736c8e803c94a97370feda024ffa996780702ce93dcc5b", kill_on_drop: false }` [INFO] [stdout] 13cf70590d0d57fba1736c8e803c94a97370feda024ffa996780702ce93dcc5b