[INFO] cloning repository https://github.com/parkedtruck/eulers_project_rust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/parkedtruck/eulers_project_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparkedtruck%2Feulers_project_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparkedtruck%2Feulers_project_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ea69f0019a733760b30bd90586d3a5f4ab2bf3ac
[INFO] checking parkedtruck/eulers_project_rust against master#bdcb6a99e853732f8ec050ae4986aa3af51d44c5 for 92191_revert
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fparkedtruck%2Feulers_project_rust" "/workspace/builds/worker-27/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-27/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/parkedtruck/eulers_project_rust on toolchain bdcb6a99e853732f8ec050ae4986aa3af51d44c5
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/parkedtruck/eulers_project_rust
[INFO] finished tweaking git repo https://github.com/parkedtruck/eulers_project_rust
[INFO] tweaked toml for git repo https://github.com/parkedtruck/eulers_project_rust written to /workspace/builds/worker-27/source/Cargo.toml
[INFO] crate git repo https://github.com/parkedtruck/eulers_project_rust already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "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-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] c62786c75bf2179de026db12b8f26be4522471e08d5217d532d02d0da4a6f938
[INFO] running `Command { std: "docker" "start" "-a" "c62786c75bf2179de026db12b8f26be4522471e08d5217d532d02d0da4a6f938", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "c62786c75bf2179de026db12b8f26be4522471e08d5217d532d02d0da4a6f938", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "c62786c75bf2179de026db12b8f26be4522471e08d5217d532d02d0da4a6f938", kill_on_drop: false }`
[INFO] [stdout] c62786c75bf2179de026db12b8f26be4522471e08d5217d532d02d0da4a6f938
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-27/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" "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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+bdcb6a99e853732f8ec050ae4986aa3af51d44c5" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 453a1e2155cac96128cfe6af2890e8eaf818d3dd7e1879ee02cddb9aa6e93cfd
[INFO] running `Command { std: "docker" "start" "-a" "453a1e2155cac96128cfe6af2890e8eaf818d3dd7e1879ee02cddb9aa6e93cfd", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.123
[INFO] [stderr]     Checking getrandom v0.2.6
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking hello_world v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         Err(u32) => return (),
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]   --> src/main.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Err(u32) => return 0,
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prevprev` is never read
[INFO] [stdout]   --> src/main.rs:59:28
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (mut t, mut i, mut prevprev, mut prev, mut current) = (0, 1, 0, 1, 1);
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]   --> src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         Err(u32) => return 0,
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]   --> src/main.rs:21:13
[INFO] [stdout]    |
[INFO] [stdout] 21 |         Err(u32) => return (),
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]   --> src/main.rs:42:13
[INFO] [stdout]    |
[INFO] [stdout] 42 |         Err(u32) => return 0,
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: value assigned to `prevprev` is never read
[INFO] [stdout]   --> src/main.rs:59:28
[INFO] [stdout]    |
[INFO] [stdout] 59 |     let (mut t, mut i, mut prevprev, mut prev, mut current) = (0, 1, 0, 1, 1);
[INFO] [stdout]    |                            ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_assignments)]` on by default
[INFO] [stdout]    = help: maybe it is overwritten before being read?
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `u32`
[INFO] [stdout]   --> src/main.rs:69:13
[INFO] [stdout]    |
[INFO] [stdout] 69 |         Err(u32) => return 0,
[INFO] [stdout]    |             ^^^ help: if this is intentional, prefix it with an underscore: `_u32`
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 4 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 26.69s
[INFO] running `Command { std: "docker" "inspect" "453a1e2155cac96128cfe6af2890e8eaf818d3dd7e1879ee02cddb9aa6e93cfd", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "453a1e2155cac96128cfe6af2890e8eaf818d3dd7e1879ee02cddb9aa6e93cfd", kill_on_drop: false }`
[INFO] [stdout] 453a1e2155cac96128cfe6af2890e8eaf818d3dd7e1879ee02cddb9aa6e93cfd