[INFO] fetching crate bigtools 0.1.2...
[INFO] documenting bigtools-0.1.2 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate bigtools 0.1.2 into /workspace/builds/worker-3/source
[INFO] validating manifest of crates.io crate bigtools 0.1.2 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate bigtools 0.1.2
[INFO] finished tweaking crates.io crate bigtools 0.1.2
[INFO] tweaked toml for crates.io crate bigtools 0.1.2 written to /workspace/builds/worker-3/source/Cargo.toml
[INFO] crate crates.io crate bigtools 0.1.2 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] ea265580fc1fc22564e2f6dd051ef05cfa8e915b3da5b8f8f5d7732997152c47
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ea265580fc1fc22564e2f6dd051ef05cfa8e915b3da5b8f8f5d7732997152c47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ea265580fc1fc22564e2f6dd051ef05cfa8e915b3da5b8f8f5d7732997152c47", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ea265580fc1fc22564e2f6dd051ef05cfa8e915b3da5b8f8f5d7732997152c47", kill_on_drop: false }`
[INFO] [stdout] ea265580fc1fc22564e2f6dd051ef05cfa8e915b3da5b8f8f5d7732997152c47
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-3/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" "RUSTDOCFLAGS=--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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ff3b2adb2af0fd74ab528097a2eef12b82f465dd91fc1c9322d6e184222fb859
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "ff3b2adb2af0fd74ab528097a2eef12b82f465dd91fc1c9322d6e184222fb859", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.65
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]    Compiling syn v1.0.7
[INFO] [stderr]    Compiling cc v1.0.46
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking rand_core v0.4.2
[INFO] [stderr]     Checking slab v0.4.2
[INFO] [stderr]    Compiling pkg-config v0.3.16
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking futures-core v0.3.1
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]    Compiling proc-macro-nested v0.1.3
[INFO] [stderr]     Checking futures-sink v0.3.1
[INFO] [stderr]     Checking futures-task v0.3.1
[INFO] [stderr]     Checking smallvec v0.6.12
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]     Checking itoa v0.4.4
[INFO] [stderr]     Checking futures-io v0.3.1
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]    Compiling getrandom v0.1.13
[INFO] [stderr]    Compiling openssl v0.10.25
[INFO] [stderr]     Checking foreign-types-shared v0.1.1
[INFO] [stderr]     Checking matches v0.1.8
[INFO] [stderr]    Compiling serde v1.0.102
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]    Compiling byteorder v1.3.2
[INFO] [stderr]     Checking openssl-probe v0.1.2
[INFO] [stderr]     Checking ppv-lite86 v0.2.6
[INFO] [stderr]    Compiling encoding_rs v0.8.20
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking percent-encoding v2.1.0
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking unicode-width v0.1.6
[INFO] [stderr]     Checking mime v0.3.14
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking dtoa v0.4.4
[INFO] [stderr]     Checking strsim v0.8.0
[INFO] [stderr]     Checking base64 v0.11.0
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking ansi_term v0.11.0
[INFO] [stderr]     Checking remove_dir_all v0.5.2
[INFO] [stderr]    Compiling indexmap v1.3.0
[INFO] [stderr]    Compiling bincode v1.2.0
[INFO] [stderr]    Compiling log v0.4.8
[INFO] [stderr]    Compiling unicase v2.5.1
[INFO] [stderr]    Compiling bitflags v1.2.1
[INFO] [stderr]     Checking futures-channel v0.3.1
[INFO] [stderr]     Checking crossbeam-utils v0.6.6
[INFO] [stderr]    Compiling httparse v1.3.4
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]     Checking unicode-normalization v0.1.8
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking rand_core v0.3.1
[INFO] [stderr]     Checking rand_jitter v0.1.4
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]     Checking textwrap v0.11.0
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]    Compiling rand v0.6.5
[INFO] [stderr]     Checking itertools v0.8.1
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking rand_xorshift v0.1.1
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking crossbeam-channel v0.3.9
[INFO] [stderr]    Compiling parking_lot_core v0.4.0
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking c2-chacha v0.2.3
[INFO] [stderr]    Compiling mime_guess v2.0.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking byteordered v0.4.0
[INFO] [stderr]    Compiling openssl-sys v0.9.52
[INFO] [stderr]    Compiling libdeflater v0.2.0
[INFO] [stderr]     Checking num_cpus v1.11.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking rand_os v0.1.3
[INFO] [stderr]     Checking time v0.1.42
[INFO] [stderr]     Checking atty v0.2.13
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]    Compiling native-tls v0.2.3
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking url v2.1.0
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking tokio v0.2.11
[INFO] [stderr]     Checking parking_lot v0.7.1
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.11
[INFO] [stderr]    Compiling serde_derive v1.0.102
[INFO] [stderr]    Compiling pin-project-internal v0.4.5
[INFO] [stderr]    Compiling futures-macro v0.3.1
[INFO] [stderr]     Checking pin-project v0.4.5
[INFO] [stderr]     Checking futures-util v0.3.1
[INFO] [stderr]     Checking h2 v0.2.1
[INFO] [stderr]     Checking futures-executor v0.3.1
[INFO] [stderr]     Checking futures v0.3.1
[INFO] [stderr]     Checking hyper v0.13.2
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking reqwest v0.10.1
[INFO] [stderr]     Checking bigtools v0.1.2 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting bigtools v0.1.2 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused return value of `std::mem::replace` that must be used
[INFO] [stdout]    --> src/utils/merge.rs:456:25
[INFO] [stdout]     |
[INFO] [stdout] 456 |                         std::mem::replace(queued, one);
[INFO] [stdout]     |                         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(unused_must_use)]` on by default
[INFO] [stdout]     = note: if you don't need the old value, you can just assign the new value directly
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr] error: Could not document `bigtools`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name bigtools src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="remote"' --cfg 'feature="reqwest"' --cfg 'feature="tokio"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern bincode=/opt/rustwide/target/debug/deps/libbincode-b8205b59d9305acb.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-732daed0481f87db.rmeta --extern byteordered=/opt/rustwide/target/debug/deps/libbyteordered-c7307a33984b6de5.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-016d24982220069f.rmeta --extern crossbeam_channel=/opt/rustwide/target/debug/deps/libcrossbeam_channel-fd3e66c28af4580c.rmeta --extern crossbeam_utils=/opt/rustwide/target/debug/deps/libcrossbeam_utils-92741afceeac6a62.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-cbd1f35e5f02184f.rmeta --extern itertools=/opt/rustwide/target/debug/deps/libitertools-d74b2f937475cd06.rmeta --extern libdeflater=/opt/rustwide/target/debug/deps/liblibdeflater-b3831c4fa5dff1f3.rmeta --extern parking_lot=/opt/rustwide/target/debug/deps/libparking_lot-c0ba4f3fa31ffa13.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-c8b2a115567e15b2.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-86c1b8271a00bb80.rmeta --extern tempfile=/opt/rustwide/target/debug/deps/libtempfile-ac15380483b4c383.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-1c10f3a2b06a9cbb.rmeta --cap-lints=warn --crate-version 0.1.2` (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" "ff3b2adb2af0fd74ab528097a2eef12b82f465dd91fc1c9322d6e184222fb859", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ff3b2adb2af0fd74ab528097a2eef12b82f465dd91fc1c9322d6e184222fb859", kill_on_drop: false }`
[INFO] [stdout] ff3b2adb2af0fd74ab528097a2eef12b82f465dd91fc1c9322d6e184222fb859
