[INFO] cloning repository https://github.com/dwallach1/Spell-Checker
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/dwallach1/Spell-Checker" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwallach1%2FSpell-Checker", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwallach1%2FSpell-Checker'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 21ceaec76b202443107aa3787e18957b7ecd6908
[INFO] checking dwallach1/Spell-Checker against try#b0d0ea232bdae12fa8da8491a91ae1db029990ef for pr-84037
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fdwallach1%2FSpell-Checker" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/dwallach1/Spell-Checker on toolchain b0d0ea232bdae12fa8da8491a91ae1db029990ef
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/dwallach1/Spell-Checker
[INFO] finished tweaking git repo https://github.com/dwallach1/Spell-Checker
[INFO] tweaked toml for git repo https://github.com/dwallach1/Spell-Checker written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/dwallach1/Spell-Checker already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "fetch" "--locked" "--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-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ffb1e90422514396eec9d727b20bbe29ff0fc3c49cb08f9ce74c3e04189e0abd
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ffb1e90422514396eec9d727b20bbe29ff0fc3c49cb08f9ce74c3e04189e0abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ffb1e90422514396eec9d727b20bbe29ff0fc3c49cb08f9ce74c3e04189e0abd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ffb1e90422514396eec9d727b20bbe29ff0fc3c49cb08f9ce74c3e04189e0abd", kill_on_drop: false }`
[INFO] [stdout] ffb1e90422514396eec9d727b20bbe29ff0fc3c49cb08f9ce74c3e04189e0abd
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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" "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@sha256:20528e8c29e4536546f0102ce88568b16ea7538393a33fcca951030f7af10457" "/opt/rustwide/cargo-home/bin/cargo" "+b0d0ea232bdae12fa8da8491a91ae1db029990ef" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9a09864c0c85a9c68f5ab6d250c60989a6faf52add2f013115e39b95e491f886
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9a09864c0c85a9c68f5ab6d250c60989a6faf52add2f013115e39b95e491f886", kill_on_drop: false }`
[INFO] [stderr]     Checking hw2 v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused imports: `Write`, `stdin`, `stdout`
[INFO] [stdout]  --> src/spell_checker.rs:3:41
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Read, BufReader, BufRead, stdin, Write, stdout};
[INFO] [stdout]   |                                         ^^^^^  ^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused imports: `Write`, `stdin`, `stdout`
[INFO] [stdout]  --> src/spell_checker.rs:3:41
[INFO] [stdout]   |
[INFO] [stdout] 3 | use std::io::{Read, BufReader, BufRead, stdin, Write, stdout};
[INFO] [stdout]   |                                         ^^^^^  ^^^^^  ^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `printer`
[INFO] [stdout]   --> src/spell_checker.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn printer(cache: &Trie, level: usize) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: function is never used: `printer`
[INFO] [stdout]   --> src/spell_checker.rs:31:4
[INFO] [stdout]    |
[INFO] [stdout] 31 | fn printer(cache: &Trie, level: usize) {
[INFO] [stdout]    |    ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(dead_code)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.31s
[INFO] running `Command { std: "docker" "inspect" "9a09864c0c85a9c68f5ab6d250c60989a6faf52add2f013115e39b95e491f886", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9a09864c0c85a9c68f5ab6d250c60989a6faf52add2f013115e39b95e491f886", kill_on_drop: false }`
[INFO] [stdout] 9a09864c0c85a9c68f5ab6d250c60989a6faf52add2f013115e39b95e491f886