[INFO] cloning repository https://github.com/kosmas12/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/kosmas12/project_rust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkosmas12%2Fproject_rust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkosmas12%2Fproject_rust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 0fd5ed741adb4308f99cf02179a6634e41355b3c
[INFO] testing kosmas12/project_rust against master#432e145bd5a974c5b6f4dd9b352891bd7502b69d for pr-87041
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fkosmas12%2Fproject_rust" "/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/kosmas12/project_rust on toolchain 432e145bd5a974c5b6f4dd9b352891bd7502b69d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/kosmas12/project_rust
[INFO] finished tweaking git repo https://github.com/kosmas12/project_rust
[INFO] tweaked toml for git repo https://github.com/kosmas12/project_rust written to /workspace/builds/worker-12/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] b06cfdec617ebc9975484dcb1205e58fb5e5749bacfe8525232829a12f60227f
[INFO] running `Command { std: "docker" "start" "-a" "b06cfdec617ebc9975484dcb1205e58fb5e5749bacfe8525232829a12f60227f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "b06cfdec617ebc9975484dcb1205e58fb5e5749bacfe8525232829a12f60227f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "b06cfdec617ebc9975484dcb1205e58fb5e5749bacfe8525232829a12f60227f", kill_on_drop: false }`
[INFO] [stdout] b06cfdec617ebc9975484dcb1205e58fb5e5749bacfe8525232829a12f60227f
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 67f78460ce0c081cc08bc8b06c1da00e4499d5601b4d5bb8429e6502731a0cad
[INFO] running `Command { std: "docker" "start" "-a" "67f78460ce0c081cc08bc8b06c1da00e4499d5601b4d5bb8429e6502731a0cad", kill_on_drop: false }`
[INFO] [stderr]    Compiling project_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ReadDir`
[INFO] [stdout]   --> src/main.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 | use std::fs::{ReadDir, read_dir};
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let mut directory = read_dir(".").unwrap();
[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: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.51s
[INFO] running `Command { std: "docker" "inspect" "67f78460ce0c081cc08bc8b06c1da00e4499d5601b4d5bb8429e6502731a0cad", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "67f78460ce0c081cc08bc8b06c1da00e4499d5601b4d5bb8429e6502731a0cad", kill_on_drop: false }`
[INFO] [stdout] 67f78460ce0c081cc08bc8b06c1da00e4499d5601b4d5bb8429e6502731a0cad
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9e45b964055b305e56dfaa8476fa541de8728badcb0d76e22c7419cb3a50b1dc
[INFO] running `Command { std: "docker" "start" "-a" "9e45b964055b305e56dfaa8476fa541de8728badcb0d76e22c7419cb3a50b1dc", kill_on_drop: false }`
[INFO] [stderr]    Compiling project_rust v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `ReadDir`
[INFO] [stdout]   --> src/main.rs:21:15
[INFO] [stdout]    |
[INFO] [stdout] 21 | use std::fs::{ReadDir, read_dir};
[INFO] [stdout]    |               ^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: variable does not need to be mutable
[INFO] [stdout]    --> src/main.rs:112:9
[INFO] [stdout]     |
[INFO] [stdout] 112 |     let mut directory = read_dir(".").unwrap();
[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] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.47s
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] running `Command { std: "docker" "inspect" "9e45b964055b305e56dfaa8476fa541de8728badcb0d76e22c7419cb3a50b1dc", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9e45b964055b305e56dfaa8476fa541de8728badcb0d76e22c7419cb3a50b1dc", kill_on_drop: false }`
[INFO] [stdout] 9e45b964055b305e56dfaa8476fa541de8728badcb0d76e22c7419cb3a50b1dc
[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=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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+432e145bd5a974c5b6f4dd9b352891bd7502b69d" "test" "--frozen", kill_on_drop: false }`
[INFO] [stdout] 445e3435848d6bec315ffda0512fd4bab96fc2b45c50bbb05b9c961ad8f18f20
[INFO] running `Command { std: "docker" "start" "-a" "445e3435848d6bec315ffda0512fd4bab96fc2b45c50bbb05b9c961ad8f18f20", kill_on_drop: false }`
[INFO] [stdout] 
[INFO] [stderr] warning: unused import: `ReadDir`
[INFO] [stdout] running 0 tests
[INFO] [stderr]   --> src/main.rs:21:15
[INFO] [stdout] 
[INFO] [stderr]    |
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
[INFO] [stderr] 21 | use std::fs::{ReadDir, read_dir};
[INFO] [stdout] 
[INFO] [stderr]    |               ^^^^^^^
[INFO] [stderr]    |
[INFO] [stderr]    = note: `#[warn(unused_imports)]` on by default
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]    --> src/main.rs:112:9
[INFO] [stderr]     |
[INFO] [stderr] 112 |     let mut directory = read_dir(".").unwrap();
[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: 2 warnings emitted
[INFO] [stderr] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.02s
[INFO] [stderr]      Running unittests (/opt/rustwide/target/debug/deps/project_rust-5ddd1123d8387fb5)
[INFO] running `Command { std: "docker" "inspect" "445e3435848d6bec315ffda0512fd4bab96fc2b45c50bbb05b9c961ad8f18f20", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "445e3435848d6bec315ffda0512fd4bab96fc2b45c50bbb05b9c961ad8f18f20", kill_on_drop: false }`
[INFO] [stdout] 445e3435848d6bec315ffda0512fd4bab96fc2b45c50bbb05b9c961ad8f18f20