[INFO] fetching crate railroad_verification 0.1.0...
[INFO] documenting railroad_verification-0.1.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate railroad_verification 0.1.0 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate railroad_verification 0.1.0 on toolchain beta-2022-05-20
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate railroad_verification 0.1.0
[INFO] finished tweaking crates.io crate railroad_verification 0.1.0
[INFO] tweaked toml for crates.io crate railroad_verification 0.1.0 written to /workspace/builds/worker-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "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-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 98e471c8a843b147894bf3f76d7bc536665f979ef1d38256b95bec4e402c96f0
[INFO] running `Command { std: "docker" "start" "-a" "98e471c8a843b147894bf3f76d7bc536665f979ef1d38256b95bec4e402c96f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "98e471c8a843b147894bf3f76d7bc536665f979ef1d38256b95bec4e402c96f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "98e471c8a843b147894bf3f76d7bc536665f979ef1d38256b95bec4e402c96f0", kill_on_drop: false }`
[INFO] [stdout] 98e471c8a843b147894bf3f76d7bc536665f979ef1d38256b95bec4e402c96f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 19bd8845690eb5e4f3f5effca214b47c634a80f2e73f18c6c237105cbdeed654
[INFO] running `Command { std: "docker" "start" "-a" "19bd8845690eb5e4f3f5effca214b47c634a80f2e73f18c6c237105cbdeed654", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]  Documenting railroad_verification v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.08s
[INFO] running `Command { std: "docker" "inspect" "19bd8845690eb5e4f3f5effca214b47c634a80f2e73f18c6c237105cbdeed654", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19bd8845690eb5e4f3f5effca214b47c634a80f2e73f18c6c237105cbdeed654", kill_on_drop: false }`
[INFO] [stdout] 19bd8845690eb5e4f3f5effca214b47c634a80f2e73f18c6c237105cbdeed654
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "RUSTC_BOOTSTRAP=1" "-e" "DOCS_RS=1" "-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:d190cb871061d98bc6d0581d85cb2ecb09a0f8a142ba5463de30be9999fc3251" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2022-05-20" "rustdoc" "--lib" "-Zrustdoc-map" "--frozen" "--message-format=json" "--" "-Z" "unstable-options" "--document-private-items", kill_on_drop: false }`
[INFO] [stdout] 1620c6c683c9c309759011eb6f1777d71311550bc103974e2f2dbb6426b9db5f
[INFO] running `Command { std: "docker" "start" "-a" "1620c6c683c9c309759011eb6f1777d71311550bc103974e2f2dbb6426b9db5f", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.126
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking fastrand v1.7.0
[INFO] [stderr]     Checking tempfile v3.3.0
[INFO] [stderr]  Documenting railroad_verification v0.1.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.30s
[INFO] running `Command { std: "docker" "inspect" "1620c6c683c9c309759011eb6f1777d71311550bc103974e2f2dbb6426b9db5f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1620c6c683c9c309759011eb6f1777d71311550bc103974e2f2dbb6426b9db5f", kill_on_drop: false }`
[INFO] [stdout] 1620c6c683c9c309759011eb6f1777d71311550bc103974e2f2dbb6426b9db5f