[INFO] cloning repository https://github.com/barrybhattarai/Arrow
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/barrybhattarai/Arrow" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbarrybhattarai%2FArrow", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbarrybhattarai%2FArrow'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2a3a0e0bfef301e363f0b46a3bdca63ce8e9ca51
[INFO] checking barrybhattarai/Arrow against 8773d2c75a8e90130dcce745a7ec4e66bb9963db+rustflags=-Aunfulfilled-lint-expectations for pr-163637
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fbarrybhattarai%2FArrow" "/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/barrybhattarai/Arrow
[INFO] finished tweaking git repo https://github.com/barrybhattarai/Arrow
[INFO] tweaked toml for git repo https://github.com/barrybhattarai/Arrow written to /workspace/builds/worker-5-tc2/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/barrybhattarai/Arrow on toolchain 8773d2c75a8e90130dcce745a7ec4e66bb9963db
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8773d2c75a8e90130dcce745a7ec4e66bb9963db" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/barrybhattarai/Arrow 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" "+8773d2c75a8e90130dcce745a7ec4e66bb9963db" "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/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5-tc2/target:/opt/rustwide/target:rw,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" "-m" "1610612736" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:77db811e55d90add9212f6832c23229e3de5f1c1f9905e8cb07319ea15df73ac" "sleep" "infinity", kill_on_drop: false }`
[INFO] [stdout] d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8
[INFO] running `Command { std: "docker" "start" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8" "/opt/rustwide/cargo-home/bin/cargo" "+8773d2c75a8e90130dcce745a7ec4e66bb9963db" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "exec" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid -Aunfulfilled-lint-expectations" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-w" "/opt/rustwide/workdir" "--user" "0:0" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8" "/opt/rustwide/cargo-home/bin/cargo" "+8773d2c75a8e90130dcce745a7ec4e66bb9963db" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr]     Checking arrow v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over a `Result`. This is more readably written as an `if let` statement
[INFO] [stdout]  --> src/main.rs:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 |     for item in Token::tokenize(source) {
[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] 7 -     for item in Token::tokenize(source) {
[INFO] [stdout] 7 +     while let Ok(item) = Token::tokenize(source) {
[INFO] [stdout]   |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]   |
[INFO] [stdout] 7 -     for item in Token::tokenize(source) {
[INFO] [stdout] 7 +     if let Ok(item) = Token::tokenize(source) {
[INFO] [stdout]   |
[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:7:17
[INFO] [stdout]   |
[INFO] [stdout] 7 |     for item in Token::tokenize(source) {
[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] 7 -     for item in Token::tokenize(source) {
[INFO] [stdout] 7 +     while let Ok(item) = Token::tokenize(source) {
[INFO] [stdout]   |
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]   |
[INFO] [stdout] 7 -     for item in Token::tokenize(source) {
[INFO] [stdout] 7 +     if let Ok(item) = Token::tokenize(source) {
[INFO] [stdout]   |
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.06s
[INFO] running `Command { std: "docker" "inspect" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8", kill_on_drop: false }`
[INFO] [stdout] d7a46f71fbc7c5ed16d8201dfccad7ffde6304f455f929d9df8694b7ebc551a8
