[INFO] fetching crate octorust 0.1.16...
[INFO] documenting octorust-0.1.16 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate octorust 0.1.16 into /workspace/builds/worker-46/source
[INFO] validating manifest of crates.io crate octorust 0.1.16 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 crates.io crate octorust 0.1.16
[INFO] finished tweaking crates.io crate octorust 0.1.16
[INFO] tweaked toml for crates.io crate octorust 0.1.16 written to /workspace/builds/worker-46/source/Cargo.toml
[INFO] crate crates.io crate octorust 0.1.16 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-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 3ad89b68f469882f23e027c077586ebec59fa2b02c950e79c48b9d2ee54b5e3e
[INFO] running `Command { std: "docker" "start" "-a" "3ad89b68f469882f23e027c077586ebec59fa2b02c950e79c48b9d2ee54b5e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "3ad89b68f469882f23e027c077586ebec59fa2b02c950e79c48b9d2ee54b5e3e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3ad89b68f469882f23e027c077586ebec59fa2b02c950e79c48b9d2ee54b5e3e", kill_on_drop: false }`
[INFO] [stdout] 3ad89b68f469882f23e027c077586ebec59fa2b02c950e79c48b9d2ee54b5e3e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-46/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] 4cc905f4039295820b7e96938086521a4db72b9a3e0e1791d15b50bd5e353079
[INFO] running `Command { std: "docker" "start" "-a" "4cc905f4039295820b7e96938086521a4db72b9a3e0e1791d15b50bd5e353079", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling syn v1.0.74
[INFO] [stderr]    Compiling serde_derive v1.0.126
[INFO] [stderr]     Checking scopeguard v1.1.0
[INFO] [stderr]    Compiling serde v1.0.126
[INFO] [stderr]    Compiling futures-task v0.3.16
[INFO] [stderr]    Compiling httparse v1.3.6
[INFO] [stderr]    Compiling futures-channel v0.3.16
[INFO] [stderr]     Checking regex-syntax v0.6.25
[INFO] [stderr]    Compiling anyhow v1.0.42
[INFO] [stderr]    Compiling schemars v0.8.3
[INFO] [stderr]    Compiling hyperx v1.3.0
[INFO] [stderr]     Checking untrusted v0.7.1
[INFO] [stderr]     Checking spin v0.5.2
[INFO] [stderr]     Checking uuid v0.8.2
[INFO] [stderr]     Checking dyn-clone v1.0.4
[INFO] [stderr]     Checking base64 v0.12.3
[INFO] [stderr]     Checking language-tags v0.2.2
[INFO] [stderr]    Compiling num-traits v0.2.14
[INFO] [stderr]    Compiling tokio v1.9.0
[INFO] [stderr]    Compiling num-integer v0.1.44
[INFO] [stderr]    Compiling futures-util v0.3.16
[INFO] [stderr]    Compiling indexmap v1.7.0
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]     Checking instant v0.1.10
[INFO] [stderr]    Compiling memchr v2.4.0
[INFO] [stderr]     Checking tinyvec v1.3.1
[INFO] [stderr]    Compiling serde_json v1.0.64
[INFO] [stderr]     Checking form_urlencoded v1.0.1
[INFO] [stderr]    Compiling unicase v2.6.0
[INFO] [stderr]    Compiling ring v0.16.20
[INFO] [stderr]     Checking unicode-bidi v0.3.5
[INFO] [stderr]    Compiling encoding_rs v0.8.28
[INFO] [stderr]     Checking lock_api v0.4.4
[INFO] [stderr]     Checking regex v1.5.4
[INFO] [stderr]     Checking unicode-normalization v0.1.19
[INFO] [stderr]     Checking pem v0.8.3
[INFO] [stderr]     Checking idna v0.2.3
[INFO] [stderr]     Checking url v2.2.2
[INFO] [stderr]     Checking parking_lot_core v0.8.3
[INFO] [stderr]     Checking mio v0.7.13
[INFO] [stderr]     Checking signal-hook-registry v1.4.0
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking openssl-sys v0.9.65
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking socket2 v0.4.0
[INFO] [stderr]     Checking parking_lot v0.11.1
[INFO] [stderr]     Checking openssl v0.10.35
[INFO] [stderr]    Compiling serde_derive_internals v0.25.0
[INFO] [stderr]     Checking native-tls v0.2.7
[INFO] [stderr]    Compiling tokio-macros v1.3.0
[INFO] [stderr]    Compiling pin-project-internal v1.0.8
[INFO] [stderr]    Compiling schemars_derive v0.8.3
[INFO] [stderr]    Compiling async-recursion v0.3.2
[INFO] [stderr]     Checking pin-project v1.0.8
[INFO] [stderr]     Checking tokio-util v0.6.7
[INFO] [stderr]     Checking tokio-native-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.3.3
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking serde_urlencoded v0.7.0
[INFO] [stderr]     Checking hyper v0.14.5
[INFO] [stderr]     Checking simple_asn1 v0.4.1
[INFO] [stderr]     Checking jsonwebtoken v7.2.0
[INFO] [stderr]     Checking hyper-tls v0.5.0
[INFO] [stderr]     Checking reqwest v0.11.4
[INFO] [stderr]  Documenting octorust v0.1.16 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:141:1
[INFO] [stdout]     |
[INFO] [stdout] 141 | #![feature(async_stream)]
[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 `octorust`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name octorust src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern anyhow=/opt/rustwide/target/debug/deps/libanyhow-c71486e08dde7454.rmeta --extern async_recursion=/opt/rustwide/target/debug/deps/libasync_recursion-7bdc172a0e53bc7a.so --extern chrono=/opt/rustwide/target/debug/deps/libchrono-3d5ebdc55ca7481d.rmeta --extern http=/opt/rustwide/target/debug/deps/libhttp-c497e7c5118ac588.rmeta --extern hyperx=/opt/rustwide/target/debug/deps/libhyperx-4ffdb252bf375557.rmeta --extern jsonwebtoken=/opt/rustwide/target/debug/deps/libjsonwebtoken-aabf96f37fd8b7a3.rmeta --extern mime=/opt/rustwide/target/debug/deps/libmime-21774ff537d36263.rmeta --extern percent_encoding=/opt/rustwide/target/debug/deps/libpercent_encoding-ede8fd58102f5c41.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-db82dd573426f3ed.rmeta --extern schemars=/opt/rustwide/target/debug/deps/libschemars-19806dd3622e1e40.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-65f72577742abedc.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-6f77fbd06c8b7875.rmeta --cap-lints=warn --crate-version 0.1.16` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "4cc905f4039295820b7e96938086521a4db72b9a3e0e1791d15b50bd5e353079", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "4cc905f4039295820b7e96938086521a4db72b9a3e0e1791d15b50bd5e353079", kill_on_drop: false }`
[INFO] [stdout] 4cc905f4039295820b7e96938086521a4db72b9a3e0e1791d15b50bd5e353079
