[INFO] cloning repository https://github.com/quebin31/recommendation-system
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quebin31/recommendation-system" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquebin31%2Frecommendation-system", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquebin31%2Frecommendation-system'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d3c9fb5c93c13a8f4b0b9db1a8ca32c695647e37
[INFO] testing quebin31/recommendation-system against 1.60.0 for beta-1.61-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquebin31%2Frecommendation-system" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quebin31/recommendation-system on toolchain 1.60.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quebin31/recommendation-system
[INFO] finished tweaking git repo https://github.com/quebin31/recommendation-system
[INFO] tweaked toml for git repo https://github.com/quebin31/recommendation-system written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/quebin31/recommendation-system already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.60.0" "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] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded dirs-sys-next v0.1.0
[INFO] [stderr]   Downloaded enum-as-inner v0.3.2
[INFO] [stderr]   Downloaded serde_with_macros v1.1.0
[INFO] [stderr]   Downloaded simplelog v0.8.0
[INFO] [stderr]   Downloaded typed-builder v0.3.0
[INFO] [stderr]   Downloaded mongodb v1.0.0
[INFO] [stderr]   Downloaded assert_approx_eq v1.1.0
[INFO] [stderr]   Downloaded rustversion v1.0.3
[INFO] [stderr]   Downloaded terminal_size v0.1.12
[INFO] [stderr]   Downloaded dirs-next v1.0.1
[INFO] [stderr]   Downloaded common_macros v0.1.1
[INFO] [stderr]   Downloaded criterion-plot v0.4.2
[INFO] [stderr]   Downloaded criterion v0.3.2
[INFO] [stderr]   Downloaded serde_with v1.4.0
[INFO] [stderr]   Downloaded kv-log-macro v1.0.6
[INFO] [stderr]   Downloaded futures-intrusive v0.3.1
[INFO] [stderr]   Downloaded os_info v2.0.6
[INFO] [stderr]   Downloaded widestring v0.4.2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 66a6daae8eed93087cbd255b4e82704c7936923aa676da5aaceb77d5e2b98a5f
[INFO] running `Command { std: "docker" "start" "-a" "66a6daae8eed93087cbd255b4e82704c7936923aa676da5aaceb77d5e2b98a5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "66a6daae8eed93087cbd255b4e82704c7936923aa676da5aaceb77d5e2b98a5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "66a6daae8eed93087cbd255b4e82704c7936923aa676da5aaceb77d5e2b98a5f", kill_on_drop: false }`
[INFO] [stdout] 66a6daae8eed93087cbd255b4e82704c7936923aa676da5aaceb77d5e2b98a5f
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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=warn" "-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:b0c94ce3c1162fcb8e57cac5b65ec2f72eabb1eebea4fcc35e269e823f681646" "/opt/rustwide/cargo-home/bin/cargo" "+1.60.0" "build" "--frozen" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1548238ac891d5fe7f6a62ded442488c1ba26333bb41b96266146668ec742093
[INFO] running `Command { std: "docker" "start" "-a" "1548238ac891d5fe7f6a62ded442488c1ba26333bb41b96266146668ec742093", 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] [stderr]    Compiling libc v0.2.71
[INFO] [stderr]    Compiling proc-macro2 v1.0.18
[INFO] [stderr]    Compiling syn v1.0.33
[INFO] [stderr]    Compiling autocfg v1.0.0
[INFO] [stderr]    Compiling byteorder v1.3.4
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling once_cell v1.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.114
[INFO] [stderr]    Compiling serde v1.0.114
[INFO] [stderr]    Compiling typenum v1.12.0
[INFO] [stderr]    Compiling slab v0.4.2
[INFO] [stderr]    Compiling version_check v0.9.2
[INFO] [stderr]    Compiling getrandom v0.1.14
[INFO] [stderr]    Compiling futures-core v0.3.5
[INFO] [stderr]    Compiling unicode-width v0.1.7
[INFO] [stderr]    Compiling pin-project-internal v0.4.22
[INFO] [stderr]    Compiling cc v1.0.55
[INFO] [stderr]    Compiling proc-macro-nested v0.1.6
[INFO] [stderr]    Compiling itoa v0.4.6
[INFO] [stderr]    Compiling tinyvec v0.3.3
[INFO] [stderr]    Compiling matches v0.1.8
[INFO] [stderr]    Compiling proc-macro-hack v0.5.16
[INFO] [stderr]    Compiling futures-io v0.3.5
[INFO] [stderr]    Compiling ppv-lite86 v0.2.8
[INFO] [stderr]    Compiling maybe-uninit v2.0.0
[INFO] [stderr]    Compiling scopeguard v1.1.0
[INFO] [stderr]    Compiling futures-sink v0.3.5
[INFO] [stderr]    Compiling smallvec v1.4.0
[INFO] [stderr]    Compiling unicode-segmentation v1.6.0
[INFO] [stderr]    Compiling pin-project-lite v0.1.7
[INFO] [stderr]    Compiling rustversion v1.0.3
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling gimli v0.21.0
[INFO] [stderr]    Compiling adler32 v1.1.0
[INFO] [stderr]    Compiling anyhow v1.0.31
[INFO] [stderr]    Compiling bytes v0.5.5
[INFO] [stderr]    Compiling subtle v1.0.0
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling serde_json v1.0.55
[INFO] [stderr]    Compiling match_cfg v0.1.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.16
[INFO] [stderr]    Compiling regex-syntax v0.6.18
[INFO] [stderr]    Compiling object v0.20.0
[INFO] [stderr]    Compiling linked-hash-map v0.5.3
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling pq-sys v0.4.6
[INFO] [stderr]    Compiling base64 v0.11.0
[INFO] [stderr]    Compiling quick-error v1.2.3
[INFO] [stderr]    Compiling encode_unicode v0.3.6
[INFO] [stderr]    Compiling futures-timer v2.0.2
[INFO] [stderr]    Compiling hex v0.3.2
[INFO] [stderr]    Compiling common_macros v0.1.1
[INFO] [stderr]    Compiling number_prefix v0.3.0
[INFO] [stderr]    Compiling base64 v0.12.3
[INFO] [stderr]    Compiling md5 v0.6.1
[INFO] [stderr]    Compiling take_mut v0.2.2
[INFO] [stderr]    Compiling hex v0.4.2
[INFO] [stderr]    Compiling dotenv v0.15.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]    Compiling lexical-core v0.7.4
[INFO] [stderr]    Compiling arrayvec v0.5.1
[INFO] [stderr]    Compiling termcolor v1.1.0
[INFO] [stderr]    Compiling csv-core v0.1.10
[INFO] [stderr]    Compiling textwrap v0.11.0
[INFO] [stderr]    Compiling miniz_oxide v0.3.7
[INFO] [stderr]    Compiling lock_api v0.3.4
[INFO] [stderr]    Compiling unicode-bidi v0.3.4
[INFO] [stderr]    Compiling futures-channel v0.3.5
[INFO] [stderr]    Compiling futures-task v0.3.5
[INFO] [stderr]    Compiling lru-cache v0.1.2
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling crossbeam-utils v0.7.2
[INFO] [stderr]    Compiling num-integer v0.1.43
[INFO] [stderr]    Compiling memoffset v0.5.4
[INFO] [stderr]    Compiling crossbeam-epoch v0.8.2
[INFO] [stderr]    Compiling indexmap v1.4.0
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]    Compiling unicode-normalization v0.1.13
[INFO] [stderr] error: could not compile `cc`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustc --crate-name cc --edition=2018 /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/cc-1.0.55/src/lib.rs --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --crate-type lib --emit=dep-info,metadata,link -C embed-bitcode=no -C debuginfo=2 -C metadata=28835521dc227c65 -C extra-filename=-28835521dc227c65 --out-dir /opt/rustwide/target/debug/deps -L dependency=/opt/rustwide/target/debug/deps --cap-lints allow --cap-lints=warn` (signal: 9, SIGKILL: kill)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "1548238ac891d5fe7f6a62ded442488c1ba26333bb41b96266146668ec742093", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1548238ac891d5fe7f6a62ded442488c1ba26333bb41b96266146668ec742093", kill_on_drop: false }`
[INFO] [stdout] 1548238ac891d5fe7f6a62ded442488c1ba26333bb41b96266146668ec742093