[INFO] cloning repository https://github.com/fdb/rustcarver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/fdb/rustcarver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdb%2Frustcarver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdb%2Frustcarver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 5848b7948f2063d028686ac9a8c3887c0768be08
[INFO] building fdb/rustcarver against master#3266c36624e804f9f086ebd40db19039b55a4ec1 for pr-111698
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ffdb%2Frustcarver" "/workspace/builds/worker-6-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/fdb/rustcarver on toolchain 3266c36624e804f9f086ebd40db19039b55a4ec1
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+3266c36624e804f9f086ebd40db19039b55a4ec1" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/fdb/rustcarver
[INFO] finished tweaking git repo https://github.com/fdb/rustcarver
[INFO] tweaked toml for git repo https://github.com/fdb/rustcarver written to /workspace/builds/worker-6-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/fdb/rustcarver 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" "+3266c36624e804f9f086ebd40db19039b55a4ec1" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded rand v0.4.5
[INFO] [stderr]   Downloaded libc v0.2.47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+3266c36624e804f9f086ebd40db19039b55a4ec1" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 7e1bc344e5a0160b7976f77046fe8b12769ce19ecc05e5366fe8498e83500832
[INFO] running `Command { std: "docker" "start" "-a" "7e1bc344e5a0160b7976f77046fe8b12769ce19ecc05e5366fe8498e83500832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "7e1bc344e5a0160b7976f77046fe8b12769ce19ecc05e5366fe8498e83500832", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7e1bc344e5a0160b7976f77046fe8b12769ce19ecc05e5366fe8498e83500832", kill_on_drop: false }`
[INFO] [stdout] 7e1bc344e5a0160b7976f77046fe8b12769ce19ecc05e5366fe8498e83500832
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+3266c36624e804f9f086ebd40db19039b55a4ec1" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 2efc62005e9d47c257233b733ada66940bb2f89dff765b68acc9050d17d8db7f
[INFO] running `Command { std: "docker" "start" "-a" "2efc62005e9d47c257233b733ada66940bb2f89dff765b68acc9050d17d8db7f", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.47
[INFO] [stderr]    Compiling same-file v1.0.4
[INFO] [stderr]    Compiling walkdir v2.2.7
[INFO] [stderr]    Compiling dirs v1.0.4
[INFO] [stderr]    Compiling rustcarver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `home_dir`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let home_dir = dirs::home_dir().unwrap();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_home_dir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.96s
[INFO] running `Command { std: "docker" "inspect" "2efc62005e9d47c257233b733ada66940bb2f89dff765b68acc9050d17d8db7f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "2efc62005e9d47c257233b733ada66940bb2f89dff765b68acc9050d17d8db7f", kill_on_drop: false }`
[INFO] [stdout] 2efc62005e9d47c257233b733ada66940bb2f89dff765b68acc9050d17d8db7f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6-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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+3266c36624e804f9f086ebd40db19039b55a4ec1" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 919673b976f8775d8f2cf7211710e25318475a1c0ce9324d5267f20f71c967e6
[INFO] running `Command { std: "docker" "start" "-a" "919673b976f8775d8f2cf7211710e25318475a1c0ce9324d5267f20f71c967e6", kill_on_drop: false }`
[INFO] [stderr]    Compiling rustcarver v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused variable: `home_dir`
[INFO] [stdout]   --> src/main.rs:16:9
[INFO] [stdout]    |
[INFO] [stdout] 16 |     let home_dir = dirs::home_dir().unwrap();
[INFO] [stdout]    |         ^^^^^^^^ help: if this is intentional, prefix it with an underscore: `_home_dir`
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_variables)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished test [unoptimized + debuginfo] target(s) in 0.25s
[INFO] running `Command { std: "docker" "inspect" "919673b976f8775d8f2cf7211710e25318475a1c0ce9324d5267f20f71c967e6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "919673b976f8775d8f2cf7211710e25318475a1c0ce9324d5267f20f71c967e6", kill_on_drop: false }`
[INFO] [stdout] 919673b976f8775d8f2cf7211710e25318475a1c0ce9324d5267f20f71c967e6