[INFO] cloning repository https://github.com/khammersmith17/circular_buffer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/khammersmith17/circular_buffer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhammersmith17%2Fcircular_buffer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhammersmith17%2Fcircular_buffer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 868fa3b04c580f909f2a0f0acac83201f325ffac
[INFO] checking khammersmith17/circular_buffer against master#8c32e313cccf7df531e2d49ffb8227bb92304aee for pr-145608-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkhammersmith17%2Fcircular_buffer" "/workspace/builds/worker-4-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/khammersmith17/circular_buffer
[INFO] finished tweaking git repo https://github.com/khammersmith17/circular_buffer
[INFO] tweaked toml for git repo https://github.com/khammersmith17/circular_buffer written to /workspace/builds/worker-4-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/khammersmith17/circular_buffer on toolchain 8c32e313cccf7df531e2d49ffb8227bb92304aee
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/khammersmith17/circular_buffer 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" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 635e841c27b2fba683deee8bd2aa14bc9e23f530b82b5a262045d6a0ae8545c0
[INFO] running `Command { std: "docker" "start" "-a" "635e841c27b2fba683deee8bd2aa14bc9e23f530b82b5a262045d6a0ae8545c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "635e841c27b2fba683deee8bd2aa14bc9e23f530b82b5a262045d6a0ae8545c0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "635e841c27b2fba683deee8bd2aa14bc9e23f530b82b5a262045d6a0ae8545c0", kill_on_drop: false }`
[INFO] [stdout] 635e841c27b2fba683deee8bd2aa14bc9e23f530b82b5a262045d6a0ae8545c0
[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@sha256:7ad1b28ee6f5f7f699f6cf7015098d6ccdd96d6f2d78dd06228f5b4c9faf309c" "/opt/rustwide/cargo-home/bin/cargo" "+8c32e313cccf7df531e2d49ffb8227bb92304aee" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 451dff1d6e23eb9d330cb603a153000ac1e2a6d9a8004576915f7b38b579ed37
[INFO] running `Command { std: "docker" "start" "-a" "451dff1d6e23eb9d330cb603a153000ac1e2a6d9a8004576915f7b38b579ed37", kill_on_drop: false }`
[INFO] [stderr]     Checking circular_buffer v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `ticker`
[INFO] [stdout]    --> src/lib.rs:350:24
[INFO] [stdout]     |
[INFO] [stdout] 350 |         while let Some(ticker) = buffer.peek_from_end(end) {
[INFO] [stdout]     |                        ^^^^^^ help: if this is intentional, prefix it with an underscore: `_ticker`
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.08s
[INFO] running `Command { std: "docker" "inspect" "451dff1d6e23eb9d330cb603a153000ac1e2a6d9a8004576915f7b38b579ed37", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "451dff1d6e23eb9d330cb603a153000ac1e2a6d9a8004576915f7b38b579ed37", kill_on_drop: false }`
[INFO] [stdout] 451dff1d6e23eb9d330cb603a153000ac1e2a6d9a8004576915f7b38b579ed37