[INFO] fetching crate thanos-rs 1.0.0...
[INFO] documenting thanos-rs-1.0.0 against 1.61.0 for beta-1.62-rustdoc-1
[INFO] extracting crate thanos-rs 1.0.0 into /workspace/builds/worker-39/source
[INFO] validating manifest of crates.io crate thanos-rs 1.0.0 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 crates.io crate thanos-rs 1.0.0
[INFO] finished tweaking crates.io crate thanos-rs 1.0.0
[INFO] tweaked toml for crates.io crate thanos-rs 1.0.0 written to /workspace/builds/worker-39/source/Cargo.toml
[INFO] crate crates.io crate thanos-rs 1.0.0 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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded argh_derive v0.1.5
[INFO] [stderr]   Downloaded argh_shared v0.1.5
[INFO] [stderr]   Downloaded argh v0.1.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] dd3a334d24fbc3d8d5695e03096b286a05bb1c2586eb2ab02e4a705b8d8ff73a
[INFO] running `Command { std: "docker" "start" "-a" "dd3a334d24fbc3d8d5695e03096b286a05bb1c2586eb2ab02e4a705b8d8ff73a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "dd3a334d24fbc3d8d5695e03096b286a05bb1c2586eb2ab02e4a705b8d8ff73a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dd3a334d24fbc3d8d5695e03096b286a05bb1c2586eb2ab02e4a705b8d8ff73a", kill_on_drop: false }`
[INFO] [stdout] dd3a334d24fbc3d8d5695e03096b286a05bb1c2586eb2ab02e4a705b8d8ff73a
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-39/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] da7675d20d114af30faf7c2e9d7e0e5c7040cc646689bd5a80bbc3470edf8e39
[INFO] running `Command { std: "docker" "start" "-a" "da7675d20d114af30faf7c2e9d7e0e5c7040cc646689bd5a80bbc3470edf8e39", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling proc-macro2 v1.0.28
[INFO] [stderr]     Checking cfg-if v1.0.0
[INFO] [stderr]    Compiling unicode-xid v0.2.2
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]     Checking lazy_static v1.4.0
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]     Checking ppv-lite86 v0.2.10
[INFO] [stderr]     Checking unicode-width v0.1.8
[INFO] [stderr]    Compiling unicode-segmentation v1.8.0
[INFO] [stderr]    Compiling argh_shared v0.1.5
[INFO] [stderr]     Checking remove_dir_all v0.5.3
[INFO] [stderr]     Checking number_prefix v0.4.0
[INFO] [stderr]     Checking zeroize v1.4.1
[INFO] [stderr]    Compiling heck v0.3.3
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]    Compiling quote v1.0.9
[INFO] [stderr]     Checking getrandom v0.2.3
[INFO] [stderr]     Checking terminal_size v0.1.17
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking colored v2.0.0
[INFO] [stderr]     Checking rand_core v0.6.3
[INFO] [stderr]     Checking rand_chacha v0.3.1
[INFO] [stderr]     Checking rand v0.8.4
[INFO] [stderr]     Checking console v0.14.1
[INFO] [stderr]     Checking indicatif v0.16.2
[INFO] [stderr]     Checking tempfile v3.2.0
[INFO] [stderr]     Checking dialoguer v0.8.0
[INFO] [stderr]    Compiling argh_derive v0.1.5
[INFO] [stderr]     Checking argh v0.1.5
[INFO] [stderr]  Documenting thanos-rs v1.0.0 (/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(drain_filter)]
[INFO] [stdout]   |            ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 document `thanos-rs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name thanos_rs src/main.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi,artifacts,future-incompat --document-private-items -C metadata=6106742ece1df54d -L dependency=/opt/rustwide/target/debug/deps --extern argh=/opt/rustwide/target/debug/deps/libargh-d18b58a8a550090a.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-cc4256baa5ecfce6.rmeta --extern dialoguer=/opt/rustwide/target/debug/deps/libdialoguer-72af8cec7b414ca5.rmeta --extern indicatif=/opt/rustwide/target/debug/deps/libindicatif-db31de0d12c9fcfb.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-d80236683885ced5.rmeta --cap-lints=warn --crate-version 1.0.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "da7675d20d114af30faf7c2e9d7e0e5c7040cc646689bd5a80bbc3470edf8e39", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "da7675d20d114af30faf7c2e9d7e0e5c7040cc646689bd5a80bbc3470edf8e39", kill_on_drop: false }`
[INFO] [stdout] da7675d20d114af30faf7c2e9d7e0e5c7040cc646689bd5a80bbc3470edf8e39