[INFO] fetching crate gym 2.2.1...
[INFO] documenting gym-2.2.1 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate gym 2.2.1 into /workspace/builds/worker-15/source
[INFO] validating manifest of crates.io crate gym 2.2.1 on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate gym 2.2.1
[INFO] finished tweaking crates.io crate gym 2.2.1
[INFO] tweaked toml for crates.io crate gym 2.2.1 written to /workspace/builds/worker-15/source/Cargo.toml
[INFO] crate crates.io crate gym 2.2.1 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 65df098e6ad8e037d89e1db84bd698e2464fd1fa2242acce9a417b75399f9579
[INFO] running `Command { std: "docker" "start" "-a" "65df098e6ad8e037d89e1db84bd698e2464fd1fa2242acce9a417b75399f9579", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "65df098e6ad8e037d89e1db84bd698e2464fd1fa2242acce9a417b75399f9579", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "65df098e6ad8e037d89e1db84bd698e2464fd1fa2242acce9a417b75399f9579", kill_on_drop: false }`
[INFO] [stdout] 65df098e6ad8e037d89e1db84bd698e2464fd1fa2242acce9a417b75399f9579
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-15/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" "ghcr.io/rust-lang/crates-build-env/linux@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 1356ed811b10abe26134e74b34b0c9f40b9be08c9e952169fae3adc7c95ac404
[INFO] running `Command { std: "docker" "start" "-a" "1356ed811b10abe26134e74b34b0c9f40b9be08c9e952169fae3adc7c95ac404", kill_on_drop: false }`
[INFO] [stderr]    Compiling autocfg v0.1.6
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]    Compiling proc-macro2 v1.0.6
[INFO] [stderr]     Checking cfg-if v0.1.9
[INFO] [stderr]    Compiling regex-syntax v0.6.12
[INFO] [stderr]    Compiling cc v1.0.47
[INFO] [stderr]    Compiling syn v1.0.9
[INFO] [stderr]    Compiling getrandom v0.1.10
[INFO] [stderr]    Compiling failure_derive v0.1.6
[INFO] [stderr]     Checking ppv-lite86 v0.2.5
[INFO] [stderr]    Compiling ndarray v0.13.0
[INFO] [stderr]    Compiling cpython v0.4.1
[INFO] [stderr]     Checking rawpointer v0.2.1
[INFO] [stderr]     Checking either v1.5.3
[INFO] [stderr]    Compiling thread_local v0.3.6
[INFO] [stderr]     Checking matrixmultiply v0.2.3
[INFO] [stderr]     Checking itertools v0.8.2
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling backtrace-sys v0.1.32
[INFO] [stderr]     Checking c2-chacha v0.2.2
[INFO] [stderr]    Compiling aho-corasick v0.7.6
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]    Compiling quote v1.0.2
[INFO] [stderr]     Checking rand_chacha v0.2.1
[INFO] [stderr]     Checking rand v0.7.2
[INFO] [stderr]     Checking backtrace v0.3.40
[INFO] [stderr]    Compiling regex v1.3.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling python3-sys v0.4.1
[INFO] [stderr]     Checking failure v0.1.6
[INFO] [stderr]  Documenting gym v2.2.1 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.04s
[INFO] running `Command { std: "docker" "inspect" "1356ed811b10abe26134e74b34b0c9f40b9be08c9e952169fae3adc7c95ac404", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1356ed811b10abe26134e74b34b0c9f40b9be08c9e952169fae3adc7c95ac404", kill_on_drop: false }`
[INFO] [stdout] 1356ed811b10abe26134e74b34b0c9f40b9be08c9e952169fae3adc7c95ac404
