[INFO] cloning repository https://github.com/fearamire/fibonacci
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fearamire/fibonacci" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffearamire%2Ffibonacci", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffearamire%2Ffibonacci'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2301cadddcb21327c3363aaec5fce04cb434ab16
[INFO] checking fearamire/fibonacci against master#818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc for pr-156114-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffearamire%2Ffibonacci" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'...
[INFO] [stderr] done.
[INFO] started tweaking git repo https://github.com/fearamire/fibonacci
[INFO] finished tweaking git repo https://github.com/fearamire/fibonacci
[INFO] tweaked toml for git repo https://github.com/fearamire/fibonacci written to /workspace/builds/worker-7-tc1/source/Cargo.toml
[INFO] validating manifest of git repo https://github.com/fearamire/fibonacci on toolchain 818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] crate git repo https://github.com/fearamire/fibonacci 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" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 58d718d7145e91ebb561af577005ae1e0ef801008e29f69c16e0579e9a11dde1
[INFO] running `Command { std: "docker" "start" "-a" "58d718d7145e91ebb561af577005ae1e0ef801008e29f69c16e0579e9a11dde1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "58d718d7145e91ebb561af577005ae1e0ef801008e29f69c16e0579e9a11dde1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "58d718d7145e91ebb561af577005ae1e0ef801008e29f69c16e0579e9a11dde1", kill_on_drop: false }`
[INFO] [stdout] 58d718d7145e91ebb561af577005ae1e0ef801008e29f69c16e0579e9a11dde1
[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:d429b63d4308055ea97f60fb1d3dfca48854a00942f1bd2ad806beaf015945ec" "/opt/rustwide/cargo-home/bin/cargo" "+818811b3cd1e0ff0d8ef20d5a4cf0b7c079929bc" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 025b1ceeee5f32fc083b0144574b79aa6934d40f13d65226c015d10410f9e245
[INFO] running `Command { std: "docker" "start" "-a" "025b1ceeee5f32fc083b0144574b79aa6934d40f13d65226c015d10410f9e245", kill_on_drop: false }`
[INFO] [stderr]     Checking fibonacci v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: value assigned to `c` is never read
[INFO] [stdout]   --> src/main.rs:6:22
[INFO] [stdout]    |
[INFO] [stdout]  6 |     let mut c: u64 = 0;
[INFO] [stdout]    |                      ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 38 |                 c = a + b;
[INFO] [stdout]    |                 --------- `c` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `c` is never read
[INFO] [stdout]   --> src/main.rs:6:22
[INFO] [stdout]    |
[INFO] [stdout]  6 |     let mut c: u64 = 0;
[INFO] [stdout]    |                      ^ this value is reassigned later and never used
[INFO] [stdout] ...
[INFO] [stdout] 38 |                 c = a + b;
[INFO] [stdout]    |                 --------- `c` is overwritten here before the previous value is read
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` (part of `#[warn(unused)]`) on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "025b1ceeee5f32fc083b0144574b79aa6934d40f13d65226c015d10410f9e245", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "025b1ceeee5f32fc083b0144574b79aa6934d40f13d65226c015d10410f9e245", kill_on_drop: false }`
[INFO] [stdout] 025b1ceeee5f32fc083b0144574b79aa6934d40f13d65226c015d10410f9e245