[INFO] fetching crate remain 0.2.3...
[INFO] documenting remain-0.2.3 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate remain 0.2.3 into /workspace/builds/worker-29/source
[INFO] validating manifest of crates.io crate remain 0.2.3 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 remain 0.2.3
[INFO] finished tweaking crates.io crate remain 0.2.3
[INFO] tweaked toml for crates.io crate remain 0.2.3 written to /workspace/builds/worker-29/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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 438b50fb1f72d09e4c7da98ba0711dc592bcd076d8e000f46d2db9301ad522b8
[INFO] running `Command { std: "docker" "start" "-a" "438b50fb1f72d09e4c7da98ba0711dc592bcd076d8e000f46d2db9301ad522b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "438b50fb1f72d09e4c7da98ba0711dc592bcd076d8e000f46d2db9301ad522b8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "438b50fb1f72d09e4c7da98ba0711dc592bcd076d8e000f46d2db9301ad522b8", kill_on_drop: false }`
[INFO] [stdout] 438b50fb1f72d09e4c7da98ba0711dc592bcd076d8e000f46d2db9301ad522b8
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] a08f9ee07acfea8bdfe6983274f839b1856161e501b543c5e40fefd14221bf30
[INFO] running `Command { std: "docker" "start" "-a" "a08f9ee07acfea8bdfe6983274f839b1856161e501b543c5e40fefd14221bf30", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]  Documenting remain v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 4.85s
[INFO] running `Command { std: "docker" "inspect" "a08f9ee07acfea8bdfe6983274f839b1856161e501b543c5e40fefd14221bf30", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a08f9ee07acfea8bdfe6983274f839b1856161e501b543c5e40fefd14221bf30", kill_on_drop: false }`
[INFO] [stdout] a08f9ee07acfea8bdfe6983274f839b1856161e501b543c5e40fefd14221bf30
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-29/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] 77fbd65215b61001a2ae6f231327b4334abcf8e52b0ae50186b3fa9fa028b21d
[INFO] running `Command { std: "docker" "start" "-a" "77fbd65215b61001a2ae6f231327b4334abcf8e52b0ae50186b3fa9fa028b21d", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.39
[INFO] [stderr]     Checking unicode-ident v1.0.0
[INFO] [stderr]    Compiling syn v1.0.95
[INFO] [stderr]     Checking quote v1.0.18
[INFO] [stderr]  Documenting remain v0.2.3 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 6.76s
[INFO] running `Command { std: "docker" "inspect" "77fbd65215b61001a2ae6f231327b4334abcf8e52b0ae50186b3fa9fa028b21d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "77fbd65215b61001a2ae6f231327b4334abcf8e52b0ae50186b3fa9fa028b21d", kill_on_drop: false }`
[INFO] [stdout] 77fbd65215b61001a2ae6f231327b4334abcf8e52b0ae50186b3fa9fa028b21d