[INFO] cloning repository https://github.com/Rirush/nullptr_chat_server
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Rirush/nullptr_chat_server" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRirush%2Fnullptr_chat_server", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FRirush%2Fnullptr_chat_server'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 1c24b8fa7ce799af88e9167d4c810148c641b595
[INFO] documenting Rirush/nullptr_chat_server 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%2FRirush%2Fnullptr_chat_server" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Rirush/nullptr_chat_server 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/Rirush/nullptr_chat_server
[INFO] finished tweaking git repo https://github.com/Rirush/nullptr_chat_server
[INFO] tweaked toml for git repo https://github.com/Rirush/nullptr_chat_server written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/Rirush/nullptr_chat_server 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]  Downloading crates ...
[INFO] [stderr]   Downloaded security-framework-sys v0.2.2
[INFO] [stderr]   Downloaded base64 v0.10.0
[INFO] [stderr]   Downloaded MacTypes-sys v1.3.0
[INFO] [stderr]   Downloaded openssl v0.10.16
[INFO] [stderr]   Downloaded serde_json v1.0.34
[INFO] [stderr]   Downloaded r2d2 v0.8.3
[INFO] [stderr]   Downloaded serde_derive v1.0.84
[INFO] [stderr]   Downloaded syn v0.15.24
[INFO] [stderr]   Downloaded serde v1.0.84
[INFO] [stderr]   Downloaded crossbeam-epoch v0.7.0
[INFO] [stderr]   Downloaded r2d2_sqlite v0.7.0
[INFO] [stderr]   Downloaded rmp v0.8.7
[INFO] [stderr]   Downloaded websocket v0.22.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 13ca99b1f8b7aab6f7d29272902db7dfa6cb4741ded46491024316cfbd6f3a60
[INFO] running `Command { std: "docker" "start" "-a" "13ca99b1f8b7aab6f7d29272902db7dfa6cb4741ded46491024316cfbd6f3a60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "13ca99b1f8b7aab6f7d29272902db7dfa6cb4741ded46491024316cfbd6f3a60", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "13ca99b1f8b7aab6f7d29272902db7dfa6cb4741ded46491024316cfbd6f3a60", kill_on_drop: false }`
[INFO] [stdout] 13ca99b1f8b7aab6f7d29272902db7dfa6cb4741ded46491024316cfbd6f3a60
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] 47e738cbf6e5d3567cd3e5dcbabd9b8bb9055afee1c5072787317ad745bc8df8
[INFO] running `Command { std: "docker" "start" "-a" "47e738cbf6e5d3567cd3e5dcbabd9b8bb9055afee1c5072787317ad745bc8df8", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.45
[INFO] [stderr]     Checking cfg-if v0.1.6
[INFO] [stderr]     Checking byteorder v1.2.7
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]     Checking lazy_static v1.2.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]    Compiling cc v1.0.28
[INFO] [stderr]    Compiling proc-macro2 v0.4.24
[INFO] [stderr]    Compiling arrayvec v0.4.10
[INFO] [stderr]     Checking lazycell v1.2.1
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking nodrop v0.1.13
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling version_check v0.1.5
[INFO] [stderr]    Compiling openssl v0.10.16
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]    Compiling native-tls v0.2.2
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling serde v1.0.84
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking linked-hash-map v0.4.2
[INFO] [stderr]     Checking safemem v0.3.0
[INFO] [stderr]    Compiling unicode-segmentation v1.2.1
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling ryu v0.2.7
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking antidote v1.0.0
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]     Checking typeable v0.1.2
[INFO] [stderr]     Checking traitobject v0.1.0
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]     Checking sha1 v0.6.0
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stderr]     Checking foreign-types v0.3.2
[INFO] [stderr]     Checking unicode-bidi v0.3.4
[INFO] [stderr]    Compiling parking_lot_core v0.3.1
[INFO] [stderr]    Compiling rand_pcg v0.1.1
[INFO] [stderr]    Compiling rand_chacha v0.1.0
[INFO] [stderr]    Compiling rand v0.6.1
[INFO] [stderr]     Checking log v0.4.6
[INFO] [stderr]     Checking crossbeam-utils v0.6.3
[INFO] [stderr]     Checking owning_ref v0.4.0
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking rand_xorshift v0.1.0
[INFO] [stderr]     Checking rand_hc v0.1.0
[INFO] [stderr]     Checking rand_isaac v0.1.1
[INFO] [stderr]     Checking smallvec v0.6.7
[INFO] [stderr]     Checking scheduled-thread-pool v0.2.0
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]     Checking base64 v0.9.3
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]     Checking base64 v0.10.0
[INFO] [stderr]    Compiling unicase v1.4.2
[INFO] [stderr]     Checking lock_api v0.1.5
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking lru-cache v0.1.1
[INFO] [stderr]     Checking r2d2 v0.8.3
[INFO] [stderr]    Compiling heck v0.3.1
[INFO] [stderr]    Compiling libsqlite3-sys v0.10.0
[INFO] [stderr]     Checking mime v0.2.6
[INFO] [stderr]    Compiling openssl-sys v0.9.40
[INFO] [stderr]     Checking crossbeam-epoch v0.7.0
[INFO] [stderr]    Compiling quote v0.6.10
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking rand v0.5.5
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking time v0.1.41
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking threadpool v1.7.1
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking bytes v0.4.11
[INFO] [stderr]    Compiling syn v0.15.24
[INFO] [stderr]     Checking crossbeam-deque v0.6.3
[INFO] [stderr]     Checking mio v0.6.16
[INFO] [stderr]     Checking tokio-executor v0.1.5
[INFO] [stderr]     Checking rusqlite v0.15.0
[INFO] [stderr]     Checking num-traits v0.1.43
[INFO] [stderr]     Checking rmp v0.8.7
[INFO] [stderr]     Checking tokio-current-thread v0.1.4
[INFO] [stderr]     Checking tokio-timer v0.2.8
[INFO] [stderr]     Checking tokio-io v0.1.10
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]     Checking r2d2_sqlite v0.7.0
[INFO] [stderr]     Checking mio-uds v0.6.7
[INFO] [stderr]     Checking tokio-codec v0.1.1
[INFO] [stderr]     Checking tokio-threadpool v0.1.9
[INFO] [stderr]     Checking parking_lot v0.6.4
[INFO] [stderr]     Checking hyper v0.10.15
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]     Checking tokio-reactor v0.1.7
[INFO] [stderr]     Checking tokio-fs v0.1.4
[INFO] [stderr]     Checking tokio-tcp v0.1.2
[INFO] [stderr]     Checking tokio-udp v0.1.3
[INFO] [stderr]     Checking tokio-uds v0.2.4
[INFO] [stderr]     Checking tokio v0.1.13
[INFO] [stderr]     Checking rmp-serde v0.13.7
[INFO] [stderr]     Checking serde_json v1.0.34
[INFO] [stderr]     Checking tokio-tls v0.2.0
[INFO] [stderr]     Checking websocket v0.22.1
[INFO] [stderr]    Compiling structopt-derive v0.2.14
[INFO] [stderr]    Compiling serde_derive v1.0.84
[INFO] [stderr]    Compiling handler_macro v0.1.0 (/opt/rustwide/workdir/handler_macro)
[INFO] [stderr]     Checking structopt v0.2.14
[INFO] [stderr]  Documenting quickchat 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:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(proc_macro_hygiene)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[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 `quickchat`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name quickchat src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=21115c376abdd9cb -L dependency=/opt/rustwide/target/debug/deps --extern handler_macro=/opt/rustwide/target/debug/deps/libhandler_macro-649a92fda6455545.so --extern log=/opt/rustwide/target/debug/deps/liblog-f3bcbce9108693fa.rmeta --extern r2d2=/opt/rustwide/target/debug/deps/libr2d2-38b0b48fdd454a9e.rmeta --extern r2d2_sqlite=/opt/rustwide/target/debug/deps/libr2d2_sqlite-324578120ee58f72.rmeta --extern rmp_serde=/opt/rustwide/target/debug/deps/librmp_serde-67eaa238672dbd37.rmeta --extern rusqlite=/opt/rustwide/target/debug/deps/librusqlite-9571bd83c8b80698.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-1461f913c3ee6e80.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-21200d930b49fd33.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-3f5cc9e98dad2005.rmeta --extern simplelog=/opt/rustwide/target/debug/deps/libsimplelog-5f540699b306f169.rmeta --extern structopt=/opt/rustwide/target/debug/deps/libstructopt-2272ae4a61d02b74.rmeta --extern threadpool=/opt/rustwide/target/debug/deps/libthreadpool-0e446e46268e050d.rmeta --extern websocket=/opt/rustwide/target/debug/deps/libwebsocket-bae21c7568a8193b.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "47e738cbf6e5d3567cd3e5dcbabd9b8bb9055afee1c5072787317ad745bc8df8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "47e738cbf6e5d3567cd3e5dcbabd9b8bb9055afee1c5072787317ad745bc8df8", kill_on_drop: false }`
[INFO] [stdout] 47e738cbf6e5d3567cd3e5dcbabd9b8bb9055afee1c5072787317ad745bc8df8