[INFO] fetching crate leetcode-cli 0.2.25...
[INFO] documenting leetcode-cli-0.2.25 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate leetcode-cli 0.2.25 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate leetcode-cli 0.2.25 on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate leetcode-cli 0.2.25
[INFO] finished tweaking crates.io crate leetcode-cli 0.2.25
[INFO] tweaked toml for crates.io crate leetcode-cli 0.2.25 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate leetcode-cli 0.2.25 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded secret-service v1.1.0
[INFO] [stderr]   Downloaded cargo-husky v1.5.0
[INFO] [stderr]   Downloaded indoc v0.3.4
[INFO] [stderr]   Downloaded dbus v0.2.3
[INFO] [stderr]   Downloaded ghost v0.1.1
[INFO] [stderr]   Downloaded inventory v0.1.5
[INFO] [stderr]   Downloaded inventory-impl v0.1.5
[INFO] [stderr]   Downloaded escaper v0.1.0
[INFO] [stderr]   Downloaded paste v0.1.7
[INFO] [stderr]   Downloaded paste-impl v0.1.7
[INFO] [stderr]   Downloaded async-compression v0.3.1
[INFO] [stderr]   Downloaded unindent v0.1.5
[INFO] [stderr]   Downloaded indoc-impl v0.3.4
[INFO] [stderr]   Downloaded libsqlite3-sys v0.16.0
[INFO] [stderr]   Downloaded keyring v0.8.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 1b4ab3ab5db82f52ec035f0351822718d81687e2726502e1ab2bc309ec0b6bf9
[INFO] running `Command { std: "docker" "start" "-a" "1b4ab3ab5db82f52ec035f0351822718d81687e2726502e1ab2bc309ec0b6bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1b4ab3ab5db82f52ec035f0351822718d81687e2726502e1ab2bc309ec0b6bf9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1b4ab3ab5db82f52ec035f0351822718d81687e2726502e1ab2bc309ec0b6bf9", kill_on_drop: false }`
[INFO] [stdout] 1b4ab3ab5db82f52ec035f0351822718d81687e2726502e1ab2bc309ec0b6bf9
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "rustops/crates-build-env@sha256:d92eaeed33fa75130ca1ee6c8a01d1ffb62bac859dfdfb3450e3e5d1c0146529" "/opt/rustwide/cargo-home/bin/cargo" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a007eccbde5bd7ee2ce937849aa57a5f6b5f0cba2610cbcbf7938c6b100323a9
[INFO] running `Command { std: "docker" "start" "-a" "a007eccbde5bd7ee2ce937849aa57a5f6b5f0cba2610cbcbf7938c6b100323a9", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.16
[INFO] [stderr]     Checking bytes v0.5.4
[INFO] [stderr]     Checking futures-core v0.3.4
[INFO] [stderr]     Checking pin-project-lite v0.1.4
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]     Checking futures-io v0.3.4
[INFO] [stderr]     Checking subtle v1.0.0
[INFO] [stderr]     Checking futures-sink v0.3.4
[INFO] [stderr]     Checking futures-task v0.3.4
[INFO] [stderr]     Checking pin-utils v0.1.0-alpha.4
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking tower-service v0.3.0
[INFO] [stderr]     Checking regex-syntax v0.6.16
[INFO] [stderr]     Checking entities v1.0.1
[INFO] [stderr]    Compiling num-traits v0.2.11
[INFO] [stderr]    Compiling num-integer v0.1.42
[INFO] [stderr]    Compiling num-bigint v0.2.6
[INFO] [stderr]    Compiling num-rational v0.2.3
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.40
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]    Compiling libsqlite3-sys v0.16.0
[INFO] [stderr]     Checking miniz_oxide v0.3.6
[INFO] [stderr]     Checking futures-channel v0.3.4
[INFO] [stderr]     Checking escaper v0.1.0
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dbus v0.2.3
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking aho-corasick v0.7.10
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]     Checking generic-array v0.12.3
[INFO] [stderr]     Checking want v0.3.0
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]     Checking clap v2.33.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking http v0.2.0
[INFO] [stderr]     Checking block-cipher-trait v0.6.2
[INFO] [stderr]     Checking digest v0.8.1
[INFO] [stderr]     Checking crypto-mac v0.7.0
[INFO] [stderr]     Checking block-buffer v0.7.3
[INFO] [stderr]     Checking aes-soft v0.3.3
[INFO] [stderr]     Checking block-modes v0.3.3
[INFO] [stderr]     Checking hmac v0.7.1
[INFO] [stderr]     Checking sha2 v0.8.1
[INFO] [stderr]     Checking flate2 v1.0.13
[INFO] [stderr]     Checking tokio v0.2.13
[INFO] [stderr]     Checking hkdf v0.8.0
[INFO] [stderr]     Checking aes v0.3.2
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking async-compression v0.3.1
[INFO] [stderr]     Checking regex v1.3.4
[INFO] [stderr]     Checking http-body v0.3.1
[INFO] [stderr]     Checking env_logger v0.7.1
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking secret-service v1.1.0
[INFO] [stderr]     Checking keyring v0.8.0
[INFO] [stderr]     Checking tokio-util v0.2.0
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking h2 v0.2.2
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling pin-project-internal v0.4.8
[INFO] [stderr]    Compiling diesel_derives v1.4.1
[INFO] [stderr]     Checking pin-project v0.4.8
[INFO] [stderr]     Checking hyper v0.13.3
[INFO] [stderr]     Checking hyper-tls v0.4.1
[INFO] [stderr]     Checking diesel v1.4.3
[INFO] [stderr]     Checking serde v1.0.104
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking serde_json v1.0.48
[INFO] [stderr]     Checking toml v0.5.6
[INFO] [stderr]     Checking reqwest v0.10.4
[INFO] [stderr]     Checking leetcode-cli v0.2.25 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting leetcode-cli v0.2.25 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:244:1
[INFO] [stdout]     |
[INFO] [stdout] 244 | #![feature(try_trait)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]    --> src/lib.rs:244:1
[INFO] [stdout]     |
[INFO] [stdout] 244 | #![feature(try_trait)]
[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 `leetcode-cli`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name leetcode_cli 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 clap=/opt/rustwide/target/debug/deps/libclap-b4b89f0c67c0177b.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-88de9412fce6fd75.rmeta --extern diesel=/opt/rustwide/target/debug/deps/libdiesel-9bf13d793e788823.rmeta --extern dirs=/opt/rustwide/target/debug/deps/libdirs-79415bb2db4e39d8.rmeta --extern env_logger=/opt/rustwide/target/debug/deps/libenv_logger-5bfb23b13e2138c4.rmeta --extern escaper=/opt/rustwide/target/debug/deps/libescaper-3fbb0deb641a4ddb.rmeta --extern keyring=/opt/rustwide/target/debug/deps/libkeyring-6192c1eae5bab201.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-69d9a7f018cb28c7.rmeta --extern openssl=/opt/rustwide/target/debug/deps/libopenssl-49774e4053c9c1a0.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-eb88e4d2ab508438.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-c2d5b3dd3f6980b2.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-bf4f7922f64091e3.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-a01edd4e496e416f.rmeta --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-85970ac7b2913566.rmeta --extern toml=/opt/rustwide/target/debug/deps/libtoml-7f48238eaaaba78b.rmeta --cap-lints=warn --crate-version 0.2.25` (exit code: 1)
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[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: build failed
[INFO] running `Command { std: "docker" "inspect" "a007eccbde5bd7ee2ce937849aa57a5f6b5f0cba2610cbcbf7938c6b100323a9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a007eccbde5bd7ee2ce937849aa57a5f6b5f0cba2610cbcbf7938c6b100323a9", kill_on_drop: false }`
[INFO] [stdout] a007eccbde5bd7ee2ce937849aa57a5f6b5f0cba2610cbcbf7938c6b100323a9