[INFO] cloning repository https://github.com/niksteiak/benford_analyzer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/niksteiak/benford_analyzer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniksteiak%2Fbenford_analyzer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniksteiak%2Fbenford_analyzer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 9f8c3eac5c964b599e6242bd8029af624d8ecca8
[INFO] checking niksteiak/benford_analyzer against master#40daf23eeb711dadf140b2536e67e3ff4c999196 for pr-142287
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fniksteiak%2Fbenford_analyzer" "/workspace/builds/worker-0-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/niksteiak/benford_analyzer on toolchain 40daf23eeb711dadf140b2536e67e3ff4c999196
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/niksteiak/benford_analyzer
[INFO] finished tweaking git repo https://github.com/niksteiak/benford_analyzer
[INFO] tweaked toml for git repo https://github.com/niksteiak/benford_analyzer written to /workspace/builds/worker-0-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/niksteiak/benford_analyzer 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" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 923d9d0086db2d8f8d008429648add5159b7d6852e81fbdc0cdc9a5a07d5f9ce
[INFO] running `Command { std: "docker" "start" "-a" "923d9d0086db2d8f8d008429648add5159b7d6852e81fbdc0cdc9a5a07d5f9ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "923d9d0086db2d8f8d008429648add5159b7d6852e81fbdc0cdc9a5a07d5f9ce", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "923d9d0086db2d8f8d008429648add5159b7d6852e81fbdc0cdc9a5a07d5f9ce", kill_on_drop: false }`
[INFO] [stdout] 923d9d0086db2d8f8d008429648add5159b7d6852e81fbdc0cdc9a5a07d5f9ce
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0-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:eea15d5475069c3ef791f10c2c6b5af2ee421ef2da1e680ecce1cba46243983b" "/opt/rustwide/cargo-home/bin/cargo" "+40daf23eeb711dadf140b2536e67e3ff4c999196" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 23c2d670b372cabc456e253b4df1ac8bf6ff4ac8ce9b4a2a399bd8ea5189bb6e
[INFO] running `Command { std: "docker" "start" "-a" "23c2d670b372cabc456e253b4df1ac8bf6ff4ac8ce9b4a2a399bd8ea5189bb6e", kill_on_drop: false }`
[INFO] [stderr]     Checking benford_analyze v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:91:68
[INFO] [stdout]    |
[INFO] [stdout] 91 |             data_sets[col_idx].values.push(String::from(input_value.clone()));
[INFO] [stdout]    |                                                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: using `.clone()` on a double reference, which returns `&str` instead of cloning the inner type
[INFO] [stdout]   --> src/main.rs:91:68
[INFO] [stdout]    |
[INFO] [stdout] 91 |             data_sets[col_idx].values.push(String::from(input_value.clone()));
[INFO] [stdout]    |                                                                    ^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(suspicious_double_ref_op)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.09s
[INFO] running `Command { std: "docker" "inspect" "23c2d670b372cabc456e253b4df1ac8bf6ff4ac8ce9b4a2a399bd8ea5189bb6e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "23c2d670b372cabc456e253b4df1ac8bf6ff4ac8ce9b4a2a399bd8ea5189bb6e", kill_on_drop: false }`
[INFO] [stdout] 23c2d670b372cabc456e253b4df1ac8bf6ff4ac8ce9b4a2a399bd8ea5189bb6e