[INFO] cloning repository https://github.com/macdonaldo/monkey
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/macdonaldo/monkey" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmacdonaldo%2Fmonkey", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmacdonaldo%2Fmonkey'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1728597c8942f215429d4c6f17c8d74587f226da
[INFO] checking macdonaldo/monkey against master#1f12b9b0fdbe735968ac002792a720f0ba4faca6 for crater-rollup-uwu
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fmacdonaldo%2Fmonkey" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/macdonaldo/monkey on toolchain 1f12b9b0fdbe735968ac002792a720f0ba4faca6
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/macdonaldo/monkey
[INFO] removed 0 missing tests
[INFO] finished tweaking git repo https://github.com/macdonaldo/monkey
[INFO] tweaked toml for git repo https://github.com/macdonaldo/monkey written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/macdonaldo/monkey 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" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 9e3782e57811f6bd4752ca730332a18d64d5b4f947aa0ac1d5e05ea190423809
[INFO] running `Command { std: "docker" "start" "-a" "9e3782e57811f6bd4752ca730332a18d64d5b4f947aa0ac1d5e05ea190423809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "9e3782e57811f6bd4752ca730332a18d64d5b4f947aa0ac1d5e05ea190423809", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e3782e57811f6bd4752ca730332a18d64d5b4f947aa0ac1d5e05ea190423809", kill_on_drop: false }`
[INFO] [stdout] 9e3782e57811f6bd4752ca730332a18d64d5b4f947aa0ac1d5e05ea190423809
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/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@sha256:923055f121b5182466d55868a8b05e67af8ba4a3a3f6bad814e953ca3cd3ac2a" "/opt/rustwide/cargo-home/bin/cargo" "+1f12b9b0fdbe735968ac002792a720f0ba4faca6" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d4528b6e7959d3f0aeaed6178546ce78467905fa4d0abd816bb724b966f7c568
[INFO] running `Command { std: "docker" "start" "-a" "d4528b6e7959d3f0aeaed6178546ce78467905fa4d0abd816bb724b966f7c568", kill_on_drop: false }`
[INFO] [stderr]     Checking monkey v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: for loop over an `Option`. This is more readably written as an `if let` statement
[INFO] [stdout]    --> tests/parser.rs:787:45
[INFO] [stdout]     |
[INFO] [stdout] 787 |                     for (expr, expected) in parameters.iter().zip(expected_params.iter()).next() {
[INFO] [stdout]     |                                             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(for_loops_over_fallibles)]` on by default
[INFO] [stdout] help: to iterate over `parameters.iter().zip(expected_params.iter())` remove the call to `next`
[INFO] [stdout]     |
[INFO] [stdout] 787 |                     for (expr, expected) in parameters.iter().zip(expected_params.iter()).by_ref() {
[INFO] [stdout]     |                                                                                          ~~~~~~~~~
[INFO] [stdout] help: consider using `if let` to clear intent
[INFO] [stdout]     |
[INFO] [stdout] 787 |                     if let Some((expr, expected)) = parameters.iter().zip(expected_params.iter()).next() {
[INFO] [stdout]     |                     ~~~~~~~~~~~~                ~~~
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.28s
[INFO] running `Command { std: "docker" "inspect" "d4528b6e7959d3f0aeaed6178546ce78467905fa4d0abd816bb724b966f7c568", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4528b6e7959d3f0aeaed6178546ce78467905fa4d0abd816bb724b966f7c568", kill_on_drop: false }`
[INFO] [stdout] d4528b6e7959d3f0aeaed6178546ce78467905fa4d0abd816bb724b966f7c568