[INFO] cloning repository https://github.com/alimy/rocks
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/alimy/rocks" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falimy%2Frocks", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falimy%2Frocks'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ae72bc223d706a46c8c599cbb4d04364eb57cb0a
[INFO] checking alimy/rocks against master#dfd7b8d03fb93d0e03147d28b3be6d93260fa94d for pr-87050
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Falimy%2Frocks" "/workspace/builds/worker-2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/alimy/rocks on toolchain dfd7b8d03fb93d0e03147d28b3be6d93260fa94d
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/alimy/rocks
[INFO] finished tweaking git repo https://github.com/alimy/rocks
[INFO] tweaked toml for git repo https://github.com/alimy/rocks written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] crate git repo https://github.com/alimy/rocks already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "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-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] a072ef7221b2a683135326e807dd222ad0d9bd338ea1246a528388fd0c937380
[INFO] running `Command { std: "docker" "start" "-a" "a072ef7221b2a683135326e807dd222ad0d9bd338ea1246a528388fd0c937380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a072ef7221b2a683135326e807dd222ad0d9bd338ea1246a528388fd0c937380", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a072ef7221b2a683135326e807dd222ad0d9bd338ea1246a528388fd0c937380", kill_on_drop: false }`
[INFO] [stdout] a072ef7221b2a683135326e807dd222ad0d9bd338ea1246a528388fd0c937380
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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" "+dfd7b8d03fb93d0e03147d28b3be6d93260fa94d" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] d2ce85a60e8085f655a8de89f7603d63b7fd918007c9b95fe4e5a43a0108a843
[INFO] running `Command { std: "docker" "start" "-a" "d2ce85a60e8085f655a8de89f7603d63b7fd918007c9b95fe4e5a43a0108a843", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.19
[INFO] [stderr]    Compiling libc v0.2.74
[INFO] [stderr]    Compiling quote v1.0.7
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling syn v1.0.38
[INFO] [stderr]     Checking clap v2.33.2
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling structopt-derive v0.4.9
[INFO] [stderr]     Checking structopt v0.3.16
[INFO] [stderr]     Checking csv-challenge v0.1.0 (/opt/rustwide/workdir/csv-challenge)
[INFO] [stdout] warning: unused imports: `Opt`, `replace_column`, `write_csv`
[INFO] [stdout]  --> csv-challenge/benches/file_op_bench.rs:5:5
[INFO] [stdout]   |
[INFO] [stdout] 5 |     replace_column, Opt, {load_csv, write_csv},
[INFO] [stdout]   |     ^^^^^^^^^^^^^^  ^^^             ^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unused `Result` that must be used
[INFO] [stdout]   --> csv-challenge/benches/file_op_bench.rs:23:5
[INFO] [stdout]    |
[INFO] [stdout] 23 |     load_csv(filename);
[INFO] [stdout]    |     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]    = note: this `Result` may be an `Err` variant, which should be handled
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 12.41s
[INFO] running `Command { std: "docker" "inspect" "d2ce85a60e8085f655a8de89f7603d63b7fd918007c9b95fe4e5a43a0108a843", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d2ce85a60e8085f655a8de89f7603d63b7fd918007c9b95fe4e5a43a0108a843", kill_on_drop: false }`
[INFO] [stdout] d2ce85a60e8085f655a8de89f7603d63b7fd918007c9b95fe4e5a43a0108a843