[INFO] fetching crate melnet 0.2.25...
[INFO] documenting melnet-0.2.25 against beta-2022-05-20 for beta-1.62-rustdoc-1
[INFO] extracting crate melnet 0.2.25 into /workspace/builds/worker-4/source
[INFO] validating manifest of crates.io crate melnet 0.2.25 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 melnet 0.2.25
[INFO] finished tweaking crates.io crate melnet 0.2.25
[INFO] tweaked toml for crates.io crate melnet 0.2.25 written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate crates.io crate melnet 0.2.25 already has a lockfile, it will not be regenerated
[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-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] 412df74da5d451cbac1c943f4ef38805b224b2c202a797a9b68876cddcfc585b
[INFO] running `Command { std: "docker" "start" "-a" "412df74da5d451cbac1c943f4ef38805b224b2c202a797a9b68876cddcfc585b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "412df74da5d451cbac1c943f4ef38805b224b2c202a797a9b68876cddcfc585b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "412df74da5d451cbac1c943f4ef38805b224b2c202a797a9b68876cddcfc585b", kill_on_drop: false }`
[INFO] [stdout] 412df74da5d451cbac1c943f4ef38805b224b2c202a797a9b68876cddcfc585b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] a9c38d989ee3043f5efd9a614f87cfaeb5b7774f7bf194edd2cadcfd5cd57826
[INFO] running `Command { std: "docker" "start" "-a" "a9c38d989ee3043f5efd9a614f87cfaeb5b7774f7bf194edd2cadcfd5cd57826", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]     Checking futures-micro v0.3.1
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking rtrb v0.1.4
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking async-oneshot v0.4.2
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]     Checking object v0.26.0
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking futures-intrusive v0.4.0
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking async-net v1.6.0
[INFO] [stderr]     Checking async-process v1.1.0
[INFO] [stderr]     Checking smol-timeout v0.6.0
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking smolscale v0.3.16
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling async-recursion v1.0.0
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking stdcode v0.1.2
[INFO] [stderr]  Documenting melnet v0.2.25 (/opt/rustwide/workdir)
[INFO] [stderr]     Checking melnet v0.2.25 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unused import: `async_net::TcpStream`
[INFO] [stdout]  --> src/client.rs:4:5
[INFO] [stdout]   |
[INFO] [stdout] 4 | use async_net::TcpStream;
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout]   |
[INFO] [stdout]   = note: `#[warn(unused_imports)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 27.90s
[INFO] running `Command { std: "docker" "inspect" "a9c38d989ee3043f5efd9a614f87cfaeb5b7774f7bf194edd2cadcfd5cd57826", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a9c38d989ee3043f5efd9a614f87cfaeb5b7774f7bf194edd2cadcfd5cd57826", kill_on_drop: false }`
[INFO] [stdout] a9c38d989ee3043f5efd9a614f87cfaeb5b7774f7bf194edd2cadcfd5cd57826
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-4/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] e6538e99fc969f9151dce8e10ddee9b32527fcacaa0694be098bbb793bb93bac
[INFO] running `Command { std: "docker" "start" "-a" "e6538e99fc969f9151dce8e10ddee9b32527fcacaa0694be098bbb793bb93bac", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.97
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]    Compiling futures-core v0.3.21
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking pin-project-lite v0.2.6
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]    Compiling autocfg v1.0.1
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling parking_lot_core v0.8.5
[INFO] [stderr]    Compiling crossbeam-utils v0.8.6
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]    Compiling cc v1.0.68
[INFO] [stderr]    Compiling crossbeam-epoch v0.9.6
[INFO] [stderr]     Checking smallvec v1.6.1
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling futures-task v0.3.21
[INFO] [stderr]    Compiling anyhow v1.0.41
[INFO] [stderr]     Checking adler v1.0.2
[INFO] [stderr]     Checking gimli v0.25.0
[INFO] [stderr]     Checking rustc-demangle v0.1.21
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking futures-micro v0.3.1
[INFO] [stderr]    Compiling futures-util v0.3.21
[INFO] [stderr]    Compiling async-trait v0.1.51
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking termcolor v1.1.2
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking hex v0.4.3
[INFO] [stderr]     Checking humantime v2.1.0
[INFO] [stderr]     Checking tap v1.0.1
[INFO] [stderr]     Checking instant v0.1.9
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]     Checking rtrb v0.1.4
[INFO] [stderr]     Checking lock_api v0.4.5
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking async-oneshot v0.4.2
[INFO] [stderr]    Compiling memoffset v0.6.5
[INFO] [stderr]    Compiling miniz_oxide v0.4.4
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking object v0.26.0
[INFO] [stderr]     Checking aho-corasick v0.7.18
[INFO] [stderr]    Compiling backtrace v0.3.61
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking dashmap v4.0.2
[INFO] [stderr]     Checking parking_lot v0.11.2
[INFO] [stderr]     Checking crossbeam-deque v0.8.1
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking async-io v1.4.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking futures-intrusive v0.4.0
[INFO] [stderr]     Checking addr2line v0.16.0
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]     Checking async-process v1.1.0
[INFO] [stderr]     Checking async-net v1.6.0
[INFO] [stderr]     Checking smol-timeout v0.6.0
[INFO] [stderr]     Checking env_logger v0.8.4
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]     Checking smolscale v0.3.16
[INFO] [stderr]    Compiling futures-macro v0.3.21
[INFO] [stderr]    Compiling thiserror-impl v1.0.25
[INFO] [stderr]    Compiling derivative v2.2.0
[INFO] [stderr]    Compiling async-recursion v1.0.0
[INFO] [stderr]     Checking thiserror v1.0.25
[INFO] [stderr]     Checking bincode v1.3.3
[INFO] [stderr]     Checking stdcode v0.1.2
[INFO] [stderr]  Documenting melnet v0.2.25 (/opt/rustwide/workdir)
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 22.33s
[INFO] running `Command { std: "docker" "inspect" "e6538e99fc969f9151dce8e10ddee9b32527fcacaa0694be098bbb793bb93bac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e6538e99fc969f9151dce8e10ddee9b32527fcacaa0694be098bbb793bb93bac", kill_on_drop: false }`
[INFO] [stdout] e6538e99fc969f9151dce8e10ddee9b32527fcacaa0694be098bbb793bb93bac