[INFO] cloning repository https://github.com/ammarjussa/rust_guessing_game
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/ammarjussa/rust_guessing_game" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammarjussa%2Frust_guessing_game", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammarjussa%2Frust_guessing_game'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 6a2ffaf391bc3584bd2e5d7deffdac164f234657
[INFO] testing ammarjussa/rust_guessing_game against beta-2022-04-10 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammarjussa%2Frust_guessing_game" "/workspace/builds/worker-12/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-12/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ammarjussa/rust_guessing_game on toolchain beta-2022-04-10
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/ammarjussa/rust_guessing_game
[INFO] finished tweaking git repo https://github.com/ammarjussa/rust_guessing_game
[INFO] tweaked toml for git repo https://github.com/ammarjussa/rust_guessing_game written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] crate git repo https://github.com/ammarjussa/rust_guessing_game already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-04-10" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 695c8734eb2a09caadef2cfd6c17461452ff0e3f1e1a3c59105927cbc2a09ac2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "695c8734eb2a09caadef2cfd6c17461452ff0e3f1e1a3c59105927cbc2a09ac2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "695c8734eb2a09caadef2cfd6c17461452ff0e3f1e1a3c59105927cbc2a09ac2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "695c8734eb2a09caadef2cfd6c17461452ff0e3f1e1a3c59105927cbc2a09ac2", kill_on_drop: false }`
[INFO] [stdout] 695c8734eb2a09caadef2cfd6c17461452ff0e3f1e1a3c59105927cbc2a09ac2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] cea7263b7daeef8dc958db7f7eea7ad489730b40a61930c8e61e665ea937afb3
[INFO] running `Command { std: "docker" "start" "-a" "cea7263b7daeef8dc958db7f7eea7ad489730b40a61930c8e61e665ea937afb3", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling rand_os v0.1.3
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rust_guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/guess.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `correct_ans`
[INFO] [stdout]  --> src/guess.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |    let mut correct_ans = rand::thread_rng();
[INFO] [stdout]   |            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_correct_ans`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/guess.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |    let mut correct_ans = rand::thread_rng();
[INFO] [stdout]   |        ----^^^^^^^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.00s
[INFO] running `Command { std: "docker" "inspect" "cea7263b7daeef8dc958db7f7eea7ad489730b40a61930c8e61e665ea937afb3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cea7263b7daeef8dc958db7f7eea7ad489730b40a61930c8e61e665ea937afb3", kill_on_drop: false }`
[INFO] [stdout] cea7263b7daeef8dc958db7f7eea7ad489730b40a61930c8e61e665ea937afb3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 99ecdbb9eadfa78a2ca0222242efaf72af2a8ac0ec2e41a45fcd396d066b40a6
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "99ecdbb9eadfa78a2ca0222242efaf72af2a8ac0ec2e41a45fcd396d066b40a6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rust_guessing_game v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `rand::Rng`
[INFO] [stdout]  --> src/guess.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 | use rand::Rng;
[INFO] [stdout]   |     ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused variable: `correct_ans`
[INFO] [stdout]  --> src/guess.rs:5:12
[INFO] [stdout]   |
[INFO] [stdout] 5 |    let mut correct_ans = rand::thread_rng();
[INFO] [stdout]   |            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_correct_ans`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]  --> src/guess.rs:5:8
[INFO] [stdout]   |
[INFO] [stdout] 5 |    let mut correct_ans = rand::thread_rng();
[INFO] [stdout]   |        ----^^^^^^^^^^^
[INFO] [stdout]   |        |
[INFO] [stdout]   |        help: remove this `mut`
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 3 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.80s
[INFO] [stderr]   Executable unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_guessing_game-8a3042d7cb15a237)
[INFO] running `Command { std: "docker" "inspect" "99ecdbb9eadfa78a2ca0222242efaf72af2a8ac0ec2e41a45fcd396d066b40a6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "99ecdbb9eadfa78a2ca0222242efaf72af2a8ac0ec2e41a45fcd396d066b40a6", kill_on_drop: false }`
[INFO] [stdout] 99ecdbb9eadfa78a2ca0222242efaf72af2a8ac0ec2e41a45fcd396d066b40a6
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-12/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=warn" "-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:eaef2f80f755933c374d2ae5edccceec0c1312ceb8a4e0b6404e8ab76561e1e5" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-04-10" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 01901b3d3576b406bd6ea0c48c1713507f1dcc2cd22dd934fbc66eeabe1c2064
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "01901b3d3576b406bd6ea0c48c1713507f1dcc2cd22dd934fbc66eeabe1c2064", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr] warning: unused import: `rand::Rng`
[INFO] [stderr]  --> src/guess.rs:1:5
[INFO] [stderr]   |
[INFO] [stderr] 1 | use rand::Rng;
[INFO] [stderr]   |     ^^^^^^^^^
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: unused variable: `correct_ans`
[INFO] [stderr]  --> src/guess.rs:5:12
[INFO] [stderr]   |
[INFO] [stderr] 5 |    let mut correct_ans = rand::thread_rng();
[INFO] [stderr]   |            ^^^^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_correct_ans`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_variables)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]  --> src/guess.rs:5:8
[INFO] [stderr]   |
[INFO] [stderr] 5 |    let mut correct_ans = rand::thread_rng();
[INFO] [stderr]   |        ----^^^^^^^^^^^
[INFO] [stderr]   |        |
[INFO] [stderr]   |        help: remove this `mut`
[INFO] [stderr]   |
[INFO] [stderr]   = note: `#[warn(unused_mut)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: `rust_guessing_game` (bin "rust_guessing_game" test) generated 3 warnings
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.15s
[INFO] [stderr]      Running unittests src/main.rs (/opt/rustwide/target/debug/deps/rust_guessing_game-8a3042d7cb15a237)
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "01901b3d3576b406bd6ea0c48c1713507f1dcc2cd22dd934fbc66eeabe1c2064", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "01901b3d3576b406bd6ea0c48c1713507f1dcc2cd22dd934fbc66eeabe1c2064", kill_on_drop: false }`
[INFO] [stdout] 01901b3d3576b406bd6ea0c48c1713507f1dcc2cd22dd934fbc66eeabe1c2064