[INFO] cloning repository https://github.com/xiaopengli89/precord
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/xiaopengli89/precord" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaopengli89%2Fprecord", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaopengli89%2Fprecord'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e49011077c3cba47df6eaff820331ce2d59783af
[INFO] documenting xiaopengli89/precord against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fxiaopengli89%2Fprecord" "/workspace/builds/worker-42/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-42/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/xiaopengli89/precord on toolchain 1.54.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/xiaopengli89/precord
[INFO] finished tweaking git repo https://github.com/xiaopengli89/precord
[INFO] tweaked toml for git repo https://github.com/xiaopengli89/precord written to /workspace/builds/worker-42/source/Cargo.toml
[INFO] crate git repo https://github.com/xiaopengli89/precord already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 26ebda0d2f6a744dd20206d4a4760826a745a04b44286ffa6bc4a1fb7ef3b2fe
[INFO] running `Command { std: "docker" "start" "-a" "26ebda0d2f6a744dd20206d4a4760826a745a04b44286ffa6bc4a1fb7ef3b2fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "26ebda0d2f6a744dd20206d4a4760826a745a04b44286ffa6bc4a1fb7ef3b2fe", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "26ebda0d2f6a744dd20206d4a4760826a745a04b44286ffa6bc4a1fb7ef3b2fe", kill_on_drop: false }`
[INFO] [stdout] 26ebda0d2f6a744dd20206d4a4760826a745a04b44286ffa6bc4a1fb7ef3b2fe
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-42/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@sha256:34b6a614d2c27851fe6cbf88fbd1137609cefab8b10d0615aaeb6fd47975d74e" "/opt/rustwide/cargo-home/bin/cargo" "+1.54.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] e7da62731628647a45ae9a4588572abc0003f51d5860c9aa2cc88a4144ba44f5
[INFO] running `Command { std: "docker" "start" "-a" "e7da62731628647a45ae9a4588572abc0003f51d5860c9aa2cc88a4144ba44f5", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling futures-core v0.3.15
[INFO] [stderr]    Compiling proc-macro2 v1.0.27
[INFO] [stderr]     Checking futures-io v0.3.15
[INFO] [stderr]     Checking pin-project-lite v0.2.7
[INFO] [stderr]    Compiling syn v1.0.73
[INFO] [stderr]    Compiling log v0.4.14
[INFO] [stderr]     Checking slab v0.4.3
[INFO] [stderr]     Checking cache-padded v1.1.1
[INFO] [stderr]     Checking fastrand v1.4.1
[INFO] [stderr]     Checking parking v2.0.0
[INFO] [stderr]     Checking waker-fn v1.1.0
[INFO] [stderr]     Checking event-listener v2.5.1
[INFO] [stderr]    Compiling pkg-config v0.3.19
[INFO] [stderr]     Checking once_cell v1.8.0
[INFO] [stderr]    Compiling proc-macro-hack v0.5.19
[INFO] [stderr]    Compiling futures-task v0.3.15
[INFO] [stderr]    Compiling proc-macro-nested v0.1.7
[INFO] [stderr]    Compiling futures-channel v0.3.15
[INFO] [stderr]     Checking async-task v4.0.3
[INFO] [stderr]     Checking futures-sink v0.3.15
[INFO] [stderr]    Compiling signal-hook v0.3.9
[INFO] [stderr]    Compiling ucd-trie v0.1.3
[INFO] [stderr]     Checking atomic-waker v1.0.0
[INFO] [stderr]    Compiling typenum v1.13.0
[INFO] [stderr]    Compiling heim-common v0.1.0-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]     Checking futures-timer v3.0.2
[INFO] [stderr]    Compiling platforms v1.1.0
[INFO] [stderr]    Compiling async-trait v0.1.50
[INFO] [stderr]    Compiling heim-host v0.1.0-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]     Checking jpeg-decoder v0.1.22
[INFO] [stderr]     Checking bytemuck v1.7.0
[INFO] [stderr]     Checking glob v0.3.0
[INFO] [stderr]     Checking macaddr v1.0.1
[INFO] [stderr]     Checking weezl v0.1.5
[INFO] [stderr]     Checking plotters-backend v0.3.2
[INFO] [stderr]     Checking float-ord v0.2.0
[INFO] [stderr]     Checking ttf-parser v0.12.3
[INFO] [stderr]    Compiling futures-macro v0.3.15
[INFO] [stderr]    Compiling futures-util v0.3.15
[INFO] [stderr]    Compiling cmake v0.1.45
[INFO] [stderr]     Checking deflate v0.8.6
[INFO] [stderr]     Checking walkdir v2.3.2
[INFO] [stderr]     Checking ordered-float v2.7.0
[INFO] [stderr]     Checking concurrent-queue v1.2.2
[INFO] [stderr]    Compiling pest v2.1.3
[INFO] [stderr]     Checking async-lock v2.4.0
[INFO] [stderr]    Compiling freetype-sys v0.13.1
[INFO] [stderr]    Compiling expat-sys v2.1.6
[INFO] [stderr]    Compiling servo-fontconfig-sys v5.1.0
[INFO] [stderr]     Checking plotters-svg v0.3.1
[INFO] [stderr]     Checking gif v0.11.2
[INFO] [stderr]     Checking png v0.16.8
[INFO] [stderr]    Compiling semver-parser v0.10.2
[INFO] [stderr]     Checking futures-lite v1.12.0
[INFO] [stderr]     Checking async-channel v1.6.1
[INFO] [stderr]     Checking image v0.23.14
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]    Compiling semver v0.11.0
[INFO] [stderr]    Compiling proc-macro-error-attr v1.0.4
[INFO] [stderr]    Compiling rustc_version v0.3.3
[INFO] [stderr]     Checking uom v0.31.1
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-executor v1.4.1
[INFO] [stderr]     Checking async-fs v1.5.0
[INFO] [stderr]    Compiling pathfinder_simd v0.5.1
[INFO] [stderr]     Checking plotters-bitmap v0.3.1
[INFO] [stderr]     Checking polling v2.1.0
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking nix v0.20.0
[INFO] [stderr]     Checking dirs-sys-next v0.1.2
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-next v2.0.0
[INFO] [stderr]     Checking async-io v1.6.0
[INFO] [stderr]     Checking freetype v0.7.0
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking servo-fontconfig v0.5.1
[INFO] [stderr]     Checking async-net v1.6.1
[INFO] [stderr]     Checking async-process v1.1.0
[INFO] [stderr]     Checking smol v1.2.5
[INFO] [stderr]     Checking pathfinder_geometry v0.5.1
[INFO] [stderr]     Checking font-kit v0.10.1
[INFO] [stderr]     Checking plotters v0.3.1
[INFO] [stderr]    Compiling proc-macro-error v1.0.4
[INFO] [stderr]    Compiling clap_derive v3.0.0-beta.2
[INFO] [stderr]     Checking clap v3.0.0-beta.2
[INFO] [stderr]     Checking futures-executor v0.3.15
[INFO] [stderr]     Checking futures v0.3.15
[INFO] [stderr]     Checking heim-runtime v0.1.0-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]     Checking heim-cpu v0.1.0-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]     Checking heim-net v0.1.0-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]     Checking heim-process v0.1.1-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]     Checking heim v0.1.0-rc.1 (https://github.com/heim-rs/heim?rev=b292f15#b292f153)
[INFO] [stderr]  Documenting precord v0.1.7 (/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(drain_filter)]
[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 `precord`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name precord src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern clap=/opt/rustwide/target/debug/deps/libclap-3a1e6cf2e9012b62.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c9199cc08106df32.rmeta --extern futures_timer=/opt/rustwide/target/debug/deps/libfutures_timer-73ca8c041c4cd90e.rmeta --extern heim=/opt/rustwide/target/debug/deps/libheim-065658a3e4962ce2.rmeta --extern plotters=/opt/rustwide/target/debug/deps/libplotters-2a6b75225d1f9fb1.rmeta --cap-lints=warn --crate-version 0.1.7` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "e7da62731628647a45ae9a4588572abc0003f51d5860c9aa2cc88a4144ba44f5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "e7da62731628647a45ae9a4588572abc0003f51d5860c9aa2cc88a4144ba44f5", kill_on_drop: false }`
[INFO] [stdout] e7da62731628647a45ae9a4588572abc0003f51d5860c9aa2cc88a4144ba44f5
