[INFO] fetching crate smtp-server 0.1.0...
[INFO] documenting smtp-server-0.1.0 against beta-2023-04-20 for beta-1.70-rustdoc-1
[INFO] extracting crate smtp-server 0.1.0 into /workspace/builds/worker-2-tc2/source
[INFO] validating manifest of crates.io crate smtp-server 0.1.0 on toolchain beta-2023-04-20
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking crates.io crate smtp-server 0.1.0
[INFO] finished tweaking crates.io crate smtp-server 0.1.0
[INFO] tweaked toml for crates.io crate smtp-server 0.1.0 written to /workspace/builds/worker-2-tc2/source/Cargo.toml
[INFO] crate crates.io crate smtp-server 0.1.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+beta-2023-04-20" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded auto_enums v0.7.12
[INFO] [stderr]   Downloaded smtp-message v0.1.0
[INFO] [stderr]   Downloaded auto_enums_derive v0.7.12
[INFO] [stderr]   Downloaded auto_enums_core v0.7.12
[INFO] [stderr]   Downloaded duplexify v1.2.2
[INFO] [stderr]   Downloaded piper v0.1.3
[INFO] [stderr]   Downloaded smtp-server-types v0.1.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 4bbd33b1224d3f5890aee93f81495d206365cce6b95e47136445e3eb24a645ed
[INFO] running `Command { std: "docker" "start" "-a" "4bbd33b1224d3f5890aee93f81495d206365cce6b95e47136445e3eb24a645ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "4bbd33b1224d3f5890aee93f81495d206365cce6b95e47136445e3eb24a645ed", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4bbd33b1224d3f5890aee93f81495d206365cce6b95e47136445e3eb24a645ed", kill_on_drop: false }`
[INFO] [stdout] 4bbd33b1224d3f5890aee93f81495d206365cce6b95e47136445e3eb24a645ed
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2-tc2/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" "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@sha256:5ff2268d62e97bff2cde7d5815dd6ed5b47097566f13b8d0ca110b04b60e07ed" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2023-04-20" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] ab492058ae40ef90a6ef6d21f24b9f1ee14113b6d640558c13caf9e17835973f
[INFO] running `Command { std: "docker" "start" "-a" "ab492058ae40ef90a6ef6d21f24b9f1ee14113b6d640558c13caf9e17835973f", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.46
[INFO] [stderr]    Compiling quote v1.0.21
[INFO] [stderr]    Compiling unicode-ident v1.0.5
[INFO] [stderr]    Compiling syn v1.0.102
[INFO] [stderr]    Compiling futures-core v0.3.24
[INFO] [stderr]    Compiling memchr v2.5.0
[INFO] [stderr]     Checking pin-project-lite v0.2.9
[INFO] [stderr]     Checking futures-io v0.3.24
[INFO] [stderr]    Compiling slab v0.4.7
[INFO] [stderr]    Compiling libc v0.2.134
[INFO] [stderr]    Compiling version_check v0.9.4
[INFO] [stderr]     Checking cache-padded v1.2.0
[INFO] [stderr]     Checking fastrand v1.8.0
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]    Compiling log v0.4.17
[INFO] [stderr]     Checking once_cell v1.15.0
[INFO] [stderr]     Checking event-listener v2.5.3
[INFO] [stderr]     Checking concurrent-queue v1.2.4
[INFO] [stderr]    Compiling polling v2.3.0
[INFO] [stderr]    Compiling async-io v1.9.0
[INFO] [stderr]     Checking async-task v4.3.0
[INFO] [stderr]    Compiling futures-task v0.3.24
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling futures-channel v0.3.24
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]    Compiling futures-util v0.3.24
[INFO] [stderr]     Checking futures-sink v0.3.24
[INFO] [stderr]     Checking async-lock v2.5.0
[INFO] [stderr]    Compiling auto_enums_derive v0.7.12
[INFO] [stderr]     Checking tinyvec_macros v0.1.0
[INFO] [stderr]    Compiling serde_derive v1.0.145
[INFO] [stderr]    Compiling value-bag v1.0.0-alpha.9
[INFO] [stderr]     Checking async-channel v1.7.1
[INFO] [stderr]    Compiling serde v1.0.145
[INFO] [stderr]     Checking tinyvec v1.6.0
[INFO] [stderr]    Compiling signal-hook v0.3.14
[INFO] [stderr]    Compiling crossbeam-utils v0.8.12
[INFO] [stderr]    Compiling async-net v1.7.0
[INFO] [stderr]    Compiling async-fs v1.6.0
[INFO] [stderr]    Compiling num-integer v0.1.45
[INFO] [stderr]    Compiling async-process v1.5.0
[INFO] [stderr]     Checking regex-syntax v0.6.27
[INFO] [stderr]     Checking minimal-lexical v0.2.1
[INFO] [stderr]     Checking unicode-bidi v0.3.8
[INFO] [stderr]    Compiling async-trait v0.1.57
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking iana-time-zone v0.1.51
[INFO] [stderr]     Checking nom v7.1.1
[INFO] [stderr]     Checking socket2 v0.4.7
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking unicode-normalization v0.1.22
[INFO] [stderr]     Checking chrono v0.4.22
[INFO] [stderr]     Checking blocking v1.2.0
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking idna v0.3.0
[INFO] [stderr]     Checking regex-automata v0.1.10
[INFO] [stderr]    Compiling derive_utils v0.11.2
[INFO] [stderr]    Compiling ctor v0.1.23
[INFO] [stderr]    Compiling futures-macro v0.3.24
[INFO] [stderr]    Compiling auto_enums_core v0.7.12
[INFO] [stderr]    Compiling pin-project-internal v1.0.12
[INFO] [stderr]     Checking auto_enums v0.7.12
[INFO] [stderr]     Checking kv-log-macro v1.0.7
[INFO] [stderr]     Checking pin-project v1.0.12
[INFO] [stderr]     Checking async-global-executor v2.3.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/index.crates.io-6f17d22bba15001f/futures-util-0.3.24/src/lib.rs:4:53
[INFO] [stdout]   |
[INFO] [stdout] 4 | #![cfg_attr(feature = "write-all-vectored", feature(io_slice_advance))]
[INFO] [stdout]   |                                                     ^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking async-std v1.12.0
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stdout] error: aborting due to previous error
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not compile `futures-util` (lib) due to 2 previous errors
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] running `Command { std: "docker" "inspect" "ab492058ae40ef90a6ef6d21f24b9f1ee14113b6d640558c13caf9e17835973f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ab492058ae40ef90a6ef6d21f24b9f1ee14113b6d640558c13caf9e17835973f", kill_on_drop: false }`
[INFO] [stdout] ab492058ae40ef90a6ef6d21f24b9f1ee14113b6d640558c13caf9e17835973f
