[INFO] cloning repository https://github.com/quackduck/fracmd
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/quackduck/fracmd" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquackduck%2Ffracmd", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquackduck%2Ffracmd'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 4e4e5569557a95cae1e557d480e7d634cb7f9c1c
[INFO] documenting quackduck/fracmd against master#d7d9f15be205b45d44700e7ac33b4f79b91f9680 for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquackduck%2Ffracmd" "/workspace/builds/worker-1-tc1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quackduck/fracmd on toolchain d7d9f15be205b45d44700e7ac33b4f79b91f9680
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quackduck/fracmd
[INFO] finished tweaking git repo https://github.com/quackduck/fracmd
[INFO] tweaked toml for git repo https://github.com/quackduck/fracmd written to /workspace/builds/worker-1-tc1/source/Cargo.toml
[INFO] crate git repo https://github.com/quackduck/fracmd 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" "+d7d9f15be205b45d44700e7ac33b4f79b91f9680" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[ERROR] this task or one of its parent failed!
[ERROR] no output for 300 seconds
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.
[INFO] documenting quackduck/fracmd against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquackduck%2Ffracmd" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quackduck/fracmd on toolchain 50be22964035027398754e54cd3a497efb00f83e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quackduck/fracmd
[INFO] finished tweaking git repo https://github.com/quackduck/fracmd
[INFO] tweaked toml for git repo https://github.com/quackduck/fracmd written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/quackduck/fracmd 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" "+50be22964035027398754e54cd3a497efb00f83e" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]     Blocking waiting for file lock on package cache
[ERROR] error running command: no output for 300 seconds
[INFO] documenting quackduck/fracmd against master#50be22964035027398754e54cd3a497efb00f83e for pr-117450
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fquackduck%2Ffracmd" "/workspace/builds/worker-1-tc2/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1-tc2/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/quackduck/fracmd on toolchain 50be22964035027398754e54cd3a497efb00f83e
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/quackduck/fracmd
[INFO] finished tweaking git repo https://github.com/quackduck/fracmd
[INFO] tweaked toml for git repo https://github.com/quackduck/fracmd written to /workspace/builds/worker-1-tc2/source/Cargo.toml
[INFO] crate git repo https://github.com/quackduck/fracmd 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" "+50be22964035027398754e54cd3a497efb00f83e" "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 nanorand v0.6.1
[INFO] [stderr]   Downloaded flume v0.10.11
[INFO] [stderr]   Downloaded png v0.17.3
[INFO] [stderr]   Downloaded image v0.24.1
[INFO] [stderr]   Downloaded jpeg-decoder v0.2.2
[INFO] [stderr]   Downloaded tiff v0.7.1
[INFO] [stderr]   Downloaded exr v1.4.1
[INFO] [stderr]   Downloaded colors-transform v0.2.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f27856ad2a48147b5127cf318228ffc2d6d4d843f58a41a8c70d189bf4f62b4a
[INFO] running `Command { std: "docker" "start" "-a" "f27856ad2a48147b5127cf318228ffc2d6d4d843f58a41a8c70d189bf4f62b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f27856ad2a48147b5127cf318228ffc2d6d4d843f58a41a8c70d189bf4f62b4a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f27856ad2a48147b5127cf318228ffc2d6d4d843f58a41a8c70d189bf4f62b4a", kill_on_drop: false }`
[INFO] [stdout] f27856ad2a48147b5127cf318228ffc2d6d4d843f58a41a8c70d189bf4f62b4a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1-tc2/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@sha256:2788e3201cd34a07e3172128adcd8b3090168a8e3bcc40d7c032b9dda1df7d1c" "/opt/rustwide/cargo-home/bin/cargo" "+50be22964035027398754e54cd3a497efb00f83e" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 736d30d9b451bb04b37868c1b86a49ec1c2ba7a011dc83ff40b762564d2f96eb
[INFO] running `Command { std: "docker" "start" "-a" "736d30d9b451bb04b37868c1b86a49ec1c2ba7a011dc83ff40b762564d2f96eb", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.119
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling proc-macro2 v1.0.36
[INFO] [stderr]    Compiling crossbeam-utils v0.8.7
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.7
[INFO] [stderr]    Compiling syn v1.0.86
[INFO] [stderr]    Compiling rayon-core v1.9.1
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling num-bigint v0.4.3
[INFO] [stderr]     Checking adler32 v1.2.0
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]     Checking crossbeam-channel v0.5.2
[INFO] [stderr]     Checking lock_api v0.4.6
[INFO] [stderr]    Compiling quote v1.0.15
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]    Compiling num-rational v0.4.0
[INFO] [stderr]    Compiling num-iter v0.1.42
[INFO] [stderr]    Compiling rayon v1.5.1
[INFO] [stderr]     Checking spin v0.9.2
[INFO] [stderr]     Checking getrandom v0.2.5
[INFO] [stderr]     Checking num_cpus v1.13.1
[INFO] [stderr]     Checking deflate v1.0.0
[INFO] [stderr]     Checking futures-sink v0.3.21
[INFO] [stderr]     Checking weezl v0.1.5
[INFO] [stderr]     Checking nanorand v0.6.1
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking flate2 v1.0.22
[INFO] [stderr]     Checking threadpool v1.8.1
[INFO] [stderr]     Checking inflate v0.4.5
[INFO] [stderr]     Checking miniz_oxide v0.5.1
[INFO] [stderr]     Checking smallvec v1.8.0
[INFO] [stderr]     Checking lebe v0.5.1
[INFO] [stderr]     Checking color_quant v1.1.0
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking bit_field v0.10.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking gif v0.11.3
[INFO] [stderr]     Checking num-complex v0.4.0
[INFO] [stderr]     Checking png v0.17.3
[INFO] [stderr]     Checking bytemuck v1.7.3
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking tiff v0.7.1
[INFO] [stderr]     Checking scoped_threadpool v0.1.9
[INFO] [stderr]     Checking rand v0.8.5
[INFO] [stderr]     Checking colors-transform v0.2.11
[INFO] [stderr]     Checking num v0.4.0
[INFO] [stderr]     Checking jpeg-decoder v0.2.2
[INFO] [stderr]    Compiling pin-project-internal v1.0.10
[INFO] [stderr]     Checking pin-project v1.0.10
[INFO] [stderr]     Checking flume v0.10.11
[INFO] [stderr]     Checking exr v1.4.1
[INFO] [stderr]     Checking image v0.24.1
[INFO] [stderr]  Documenting fracmd v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 7.81s
[INFO] [stderr]    Generated /opt/rustwide/target/doc/fracmd/index.html
[INFO] running `Command { std: "docker" "inspect" "736d30d9b451bb04b37868c1b86a49ec1c2ba7a011dc83ff40b762564d2f96eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "736d30d9b451bb04b37868c1b86a49ec1c2ba7a011dc83ff40b762564d2f96eb", kill_on_drop: false }`
[INFO] [stdout] 736d30d9b451bb04b37868c1b86a49ec1c2ba7a011dc83ff40b762564d2f96eb