[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 try#8262275854dc0e5381c9d42d56257d94932c5a87 for pr-90799
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fammarjussa%2Frust_guessing_game" "/workspace/builds/worker-38/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-38/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/ammarjussa/rust_guessing_game on toolchain 8262275854dc0e5381c9d42d56257d94932c5a87
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-38/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" "+8262275854dc0e5381c9d42d56257d94932c5a87" "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-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 3c113d22b6bf729c2362dab4e678175aac1c600d519e884ffdfab2f00624c788
[INFO] running `Command { std: "docker" "start" "-a" "3c113d22b6bf729c2362dab4e678175aac1c600d519e884ffdfab2f00624c788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3c113d22b6bf729c2362dab4e678175aac1c600d519e884ffdfab2f00624c788", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3c113d22b6bf729c2362dab4e678175aac1c600d519e884ffdfab2f00624c788", kill_on_drop: false }`
[INFO] [stdout] 3c113d22b6bf729c2362dab4e678175aac1c600d519e884ffdfab2f00624c788
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 194cb7e424ef9979fb66b1ea58680ab436629c28b0b32cbfbe2d3eb1d4ee8e5f
[INFO] running `Command { std: "docker" "start" "-a" "194cb7e424ef9979fb66b1ea58680ab436629c28b0b32cbfbe2d3eb1d4ee8e5f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling rand_core v0.4.2
[INFO] [stderr]    Compiling libc v0.2.93
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]    Compiling rand_core v0.3.1
[INFO] [stderr]    Compiling rand_jitter v0.1.4
[INFO] [stderr]    Compiling rand_isaac v0.1.1
[INFO] [stderr]    Compiling rand_xorshift v0.1.1
[INFO] [stderr]    Compiling rand_hc v0.1.0
[INFO] [stderr]    Compiling rand_os v0.1.3
[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 4.65s
[INFO] running `Command { std: "docker" "inspect" "194cb7e424ef9979fb66b1ea58680ab436629c28b0b32cbfbe2d3eb1d4ee8e5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "194cb7e424ef9979fb66b1ea58680ab436629c28b0b32cbfbe2d3eb1d4ee8e5f", kill_on_drop: false }`
[INFO] [stdout] 194cb7e424ef9979fb66b1ea58680ab436629c28b0b32cbfbe2d3eb1d4ee8e5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] cf4fbd66b807103c99d657a10d33dd4534bdb01ff779d0806efaad1a5f852479
[INFO] running `Command { std: "docker" "start" "-a" "cf4fbd66b807103c99d657a10d33dd4534bdb01ff779d0806efaad1a5f852479", 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 1.13s
[INFO] running `Command { std: "docker" "inspect" "cf4fbd66b807103c99d657a10d33dd4534bdb01ff779d0806efaad1a5f852479", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cf4fbd66b807103c99d657a10d33dd4534bdb01ff779d0806efaad1a5f852479", kill_on_drop: false }`
[INFO] [stdout] cf4fbd66b807103c99d657a10d33dd4534bdb01ff779d0806efaad1a5f852479
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-38/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:e8397a04204aaf8b9f284182a6f9e27a3c2e67044d0943b4415b160bfc957681" "/opt/rustwide/cargo-home/bin/cargo" "+8262275854dc0e5381c9d42d56257d94932c5a87" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] d4bb511dcb8818d8617ee62b7658695ad3d4d3e228259574428d924b3ec7ebae
[INFO] running `Command { std: "docker" "start" "-a" "d4bb511dcb8818d8617ee62b7658695ad3d4d3e228259574428d924b3ec7ebae", kill_on_drop: false }`
[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 0.10s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/rust_guessing_game-98d012198e470ddf)
[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" "d4bb511dcb8818d8617ee62b7658695ad3d4d3e228259574428d924b3ec7ebae", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d4bb511dcb8818d8617ee62b7658695ad3d4d3e228259574428d924b3ec7ebae", kill_on_drop: false }`
[INFO] [stdout] d4bb511dcb8818d8617ee62b7658695ad3d4d3e228259574428d924b3ec7ebae