[INFO] cloning repository https://github.com/raagnair/leetcrab
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/raagnair/leetcrab" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraagnair%2Fleetcrab", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraagnair%2Fleetcrab'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2cd2419486187e0da3ac28f16659e7abef27572a
[INFO] checking raagnair/leetcrab against master#336209eef13882bd1e211b24779584cb7ef911eb for pr-129249
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fraagnair%2Fleetcrab" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/raagnair/leetcrab on toolchain 336209eef13882bd1e211b24779584cb7ef911eb
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/raagnair/leetcrab
[INFO] finished tweaking git repo https://github.com/raagnair/leetcrab
[INFO] tweaked toml for git repo https://github.com/raagnair/leetcrab written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/raagnair/leetcrab 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" "+336209eef13882bd1e211b24779584cb7ef911eb" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 70e200c5bcac196f0f2c227977bb315f3ee7c0d19153e95d04d9eb56c7260ab4
[INFO] running `Command { std: "docker" "start" "-a" "70e200c5bcac196f0f2c227977bb315f3ee7c0d19153e95d04d9eb56c7260ab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "70e200c5bcac196f0f2c227977bb315f3ee7c0d19153e95d04d9eb56c7260ab4", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "70e200c5bcac196f0f2c227977bb315f3ee7c0d19153e95d04d9eb56c7260ab4", kill_on_drop: false }`
[INFO] [stdout] 70e200c5bcac196f0f2c227977bb315f3ee7c0d19153e95d04d9eb56c7260ab4
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4-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:f3a9d4ad9d972b27faf3965f35b62e55ba32bbce8f20bc8fe909558a86702fde" "/opt/rustwide/cargo-home/bin/cargo" "+336209eef13882bd1e211b24779584cb7ef911eb" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9db209c12eb23ce0f0d36b082b2a4a1450b9966b4e22e6802f17c7a36e838fcf
[INFO] running `Command { std: "docker" "start" "-a" "9db209c12eb23ce0f0d36b082b2a4a1450b9966b4e22e6802f17c7a36e838fcf", kill_on_drop: false }`
[INFO] [stderr]     Checking leetcrab v0.71.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `last_iter` is never read
[INFO] [stdout]   --> src/solutions/s0017_letter_combinations.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut last_iter = vec![];
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `last_iter` is never read
[INFO] [stdout]   --> src/solutions/s0017_letter_combinations.rs:33:13
[INFO] [stdout]    |
[INFO] [stdout] 33 |     let mut last_iter = vec![];
[INFO] [stdout]    |             ^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.33s
[INFO] running `Command { std: "docker" "inspect" "9db209c12eb23ce0f0d36b082b2a4a1450b9966b4e22e6802f17c7a36e838fcf", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9db209c12eb23ce0f0d36b082b2a4a1450b9966b4e22e6802f17c7a36e838fcf", kill_on_drop: false }`
[INFO] [stdout] 9db209c12eb23ce0f0d36b082b2a4a1450b9966b4e22e6802f17c7a36e838fcf