[INFO] cloning repository https://github.com/pleasewhy/SimpleAsyncTcp
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/pleasewhy/SimpleAsyncTcp" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpleasewhy%2FSimpleAsyncTcp", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpleasewhy%2FSimpleAsyncTcp'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 239e5d7ac546e34db673289b2ff1ff7bc757fc99
[INFO] documenting pleasewhy/SimpleAsyncTcp against 1.61.0 for beta-1.62-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fpleasewhy%2FSimpleAsyncTcp" "/workspace/builds/worker-4/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-4/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/pleasewhy/SimpleAsyncTcp on toolchain 1.61.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/pleasewhy/SimpleAsyncTcp
[INFO] finished tweaking git repo https://github.com/pleasewhy/SimpleAsyncTcp
[INFO] tweaked toml for git repo https://github.com/pleasewhy/SimpleAsyncTcp written to /workspace/builds/worker-4/source/Cargo.toml
[INFO] crate git repo https://github.com/pleasewhy/SimpleAsyncTcp already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.61.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/sujayakar/unicycle`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded tokio-macros v0.2.6
[INFO] [stderr]   Downloaded futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded bit-iter v0.1.6
[INFO] [stderr]   Downloaded futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded futures-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded libc v0.2.106
[INFO] [stderr]   Downloaded futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]   Downloaded uniset v0.2.0
[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" "+1.61.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 48333776b57702c95545d7e7b5d669933b428c8d7aa30e32df32afd90a01c80d
[INFO] running `Command { std: "docker" "start" "-a" "48333776b57702c95545d7e7b5d669933b428c8d7aa30e32df32afd90a01c80d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "48333776b57702c95545d7e7b5d669933b428c8d7aa30e32df32afd90a01c80d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "48333776b57702c95545d7e7b5d669933b428c8d7aa30e32df32afd90a01c80d", kill_on_drop: false }`
[INFO] [stdout] 48333776b57702c95545d7e7b5d669933b428c8d7aa30e32df32afd90a01c80d
[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" "+1.61.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 42bf9963a5d9ecfdc331f0395e35dc170ed4825247dbaa8f1a5408f476f92362
[INFO] running `Command { std: "docker" "start" "-a" "42bf9963a5d9ecfdc331f0395e35dc170ed4825247dbaa8f1a5408f476f92362", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.106
[INFO] [stderr]     Checking cfg-if v0.1.10
[INFO] [stderr]    Compiling memchr v2.4.1
[INFO] [stderr]     Checking slab v0.4.5
[INFO] [stderr]    Compiling proc-macro2 v1.0.32
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking futures-core-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling futures-core v0.3.17
[INFO] [stderr]    Compiling syn v1.0.81
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]     Checking smallvec v1.7.0
[INFO] [stderr]     Checking pin-utils v0.1.0
[INFO] [stderr]     Checking futures-io-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking pin-project-lite v0.1.12
[INFO] [stderr]     Checking bytes v0.5.6
[INFO] [stderr]     Checking fnv v1.0.7
[INFO] [stderr]     Checking bitflags v1.3.2
[INFO] [stderr]     Checking void v1.0.2
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]     Checking uniset v0.2.0
[INFO] [stderr]     Checking byteorder v1.4.3
[INFO] [stderr]     Checking bit-iter v0.1.6
[INFO] [stderr]     Checking lock_api v0.3.4
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking futures-sink-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking thread_local v1.1.3
[INFO] [stderr]     Checking futures-channel-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking futures-util-preview v0.3.0-alpha.17
[INFO] [stderr]    Compiling quote v1.0.10
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.37
[INFO] [stderr]     Checking parking_lot_core v0.7.2
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking parking_lot v0.10.2
[INFO] [stderr]     Checking mio v0.6.23
[INFO] [stderr]     Checking futures-executor-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking unicycle v0.6.3 (https://github.com/sujayakar/unicycle?rev=44c0e8f62cb9355cfd35ef5309abf10a4c388b62#44c0e8f6)
[INFO] [stderr]     Checking futures-preview v0.3.0-alpha.17
[INFO] [stderr]     Checking mio-uds v0.6.8
[INFO] [stderr]    Compiling tokio-macros v0.2.6
[INFO] [stderr]     Checking tokio v0.2.25
[INFO] [stderr]  Documenting SimpleAsyncTcp v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:1:12
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(allocator_api)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/main.rs:2:12
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(get_mut_unchecked)]
[INFO] [stdout]   |            ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 2 previous errors
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] For more information about this error, try `rustc --explain E0554`.
[INFO] [stdout] 
[INFO] [stderr] error: could not document `SimpleAsyncTcp`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name SimpleAsyncTcp src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=1f025e572e5e7ac9 -L dependency=/opt/rustwide/target/debug/deps --extern bit_iter=/opt/rustwide/target/debug/deps/libbit_iter-868646f151c82533.rmeta --extern byteorder=/opt/rustwide/target/debug/deps/libbyteorder-7c274f399d426ec2.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c88b09d59d512941.rmeta --extern lazy_static=/opt/rustwide/target/debug/deps/liblazy_static-ed3ba279ce80868a.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-e02472b465c58e0a.rmeta --extern mio=/opt/rustwide/target/debug/deps/libmio-ad52a78bce0d0547.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-3d45e5591a7a3d4d.rmeta --extern thread_local=/opt/rustwide/target/debug/deps/libthread_local-dd4039dca16b4960.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-4e2026caf1d85995.rmeta --extern unicycle=/opt/rustwide/target/debug/deps/libunicycle-6233cd29f18fcec1.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "42bf9963a5d9ecfdc331f0395e35dc170ed4825247dbaa8f1a5408f476f92362", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "42bf9963a5d9ecfdc331f0395e35dc170ed4825247dbaa8f1a5408f476f92362", kill_on_drop: false }`
[INFO] [stdout] 42bf9963a5d9ecfdc331f0395e35dc170ed4825247dbaa8f1a5408f476f92362