[INFO] fetching crate mdo-future 0.2.0...
[INFO] documenting mdo-future-0.2.0 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate mdo-future 0.2.0 into /workspace/builds/worker-21/source
[INFO] validating manifest of crates.io crate mdo-future 0.2.0 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 mdo-future 0.2.0
[INFO] finished tweaking crates.io crate mdo-future 0.2.0
[INFO] tweaked toml for crates.io crate mdo-future 0.2.0 written to /workspace/builds/worker-21/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] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2022-05-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] adbf175f705574446343a5251d3493778b3430c6977c595de5e97cba1ceee268
[INFO] running `Command { std: "docker" "start" "-a" "adbf175f705574446343a5251d3493778b3430c6977c595de5e97cba1ceee268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "adbf175f705574446343a5251d3493778b3430c6977c595de5e97cba1ceee268", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "adbf175f705574446343a5251d3493778b3430c6977c595de5e97cba1ceee268", kill_on_drop: false }`
[INFO] [stdout] adbf175f705574446343a5251d3493778b3430c6977c595de5e97cba1ceee268
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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] 45e210e5dfd5989752e238bccd7ce32ee5f1b5cd9dedc6cedc8bd80752fe885a
[INFO] running `Command { std: "docker" "start" "-a" "45e210e5dfd5989752e238bccd7ce32ee5f1b5cd9dedc6cedc8bd80752fe885a", kill_on_drop: false }`
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]  Documenting mdo-future v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.11s
[INFO] running `Command { std: "docker" "inspect" "45e210e5dfd5989752e238bccd7ce32ee5f1b5cd9dedc6cedc8bd80752fe885a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "45e210e5dfd5989752e238bccd7ce32ee5f1b5cd9dedc6cedc8bd80752fe885a", kill_on_drop: false }`
[INFO] [stdout] 45e210e5dfd5989752e238bccd7ce32ee5f1b5cd9dedc6cedc8bd80752fe885a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-21/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" "DOCS_RS=1" "-e" "RUSTC_BOOTSTRAP=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] fd05d68e6f688e801a7505171a417f52daf26795a13eb83c524944f48b7c6b4e
[INFO] running `Command { std: "docker" "start" "-a" "fd05d68e6f688e801a7505171a417f52daf26795a13eb83c524944f48b7c6b4e", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking futures v0.1.31
[INFO] [stderr]  Documenting mdo-future v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 5.47s
[INFO] running `Command { std: "docker" "inspect" "fd05d68e6f688e801a7505171a417f52daf26795a13eb83c524944f48b7c6b4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fd05d68e6f688e801a7505171a417f52daf26795a13eb83c524944f48b7c6b4e", kill_on_drop: false }`
[INFO] [stdout] fd05d68e6f688e801a7505171a417f52daf26795a13eb83c524944f48b7c6b4e