[INFO] fetching crate azure_sdk_auth_aad 0.47.0...
[INFO] documenting azure_sdk_auth_aad-0.47.0 against 1.46.0 for beta-1.47-rustdoc-1
[INFO] extracting crate azure_sdk_auth_aad 0.47.0 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate azure_sdk_auth_aad 0.47.0 on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate azure_sdk_auth_aad 0.47.0
[INFO] finished tweaking crates.io crate azure_sdk_auth_aad 0.47.0
[INFO] tweaked toml for crates.io crate azure_sdk_auth_aad 0.47.0 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate crates.io crate azure_sdk_auth_aad 0.47.0 already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 90ddf9a4cbd9c010b050a6fb457a12780a3b5e01d93a46904a81f16bc07c57e2
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "90ddf9a4cbd9c010b050a6fb457a12780a3b5e01d93a46904a81f16bc07c57e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "90ddf9a4cbd9c010b050a6fb457a12780a3b5e01d93a46904a81f16bc07c57e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "90ddf9a4cbd9c010b050a6fb457a12780a3b5e01d93a46904a81f16bc07c57e2", kill_on_drop: false }`
[INFO] [stdout] 90ddf9a4cbd9c010b050a6fb457a12780a3b5e01d93a46904a81f16bc07c57e2
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 9b18a84e7bb7b6e2bb6bb8450b98ff0fff0cdfe25a43b3aee2ef4d31041dd86d
[INFO] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] running `Command { std: "docker" "start" "-a" "9b18a84e7bb7b6e2bb6bb8450b98ff0fff0cdfe25a43b3aee2ef4d31041dd86d", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.72
[INFO] [stderr]     Checking str-buf v1.0.1
[INFO] [stderr]    Compiling async-timer v1.0.0-beta.4
[INFO] [stderr]    Compiling ring v0.16.15
[INFO] [stderr]    Compiling openssl-sys v0.9.58
[INFO] [stderr]     Checking unicode-normalization v0.1.9
[INFO] [stderr]     Checking serde-xml-rs v0.4.0
[INFO] [stderr]    Compiling openssl v0.10.30
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking iovec v0.1.4
[INFO] [stderr]     Checking net2 v0.2.34
[INFO] [stderr]     Checking num_cpus v1.13.0
[INFO] [stderr]     Checking time v0.1.43
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking socket2 v0.3.12
[INFO] [stderr]     Checking backtrace v0.3.50
[INFO] [stderr]     Checking error-code v2.0.0
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]     Checking os-sync v0.3.2
[INFO] [stderr]     Checking bytes v0.4.12
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking chrono v0.4.13
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking failure v0.1.8
[INFO] [stderr]     Checking http v0.1.21
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tokio v0.2.21
[INFO] [stderr]     Checking serde_urlencoded v0.6.1
[INFO] [stderr]     Checking uuid v0.8.1
[INFO] [stderr]     Checking sct v0.6.0
[INFO] [stderr]     Checking webpki v0.21.3
[INFO] [stderr]     Checking ct-logs v0.6.0
[INFO] [stderr]     Checking rustls v0.17.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking tokio-tls v0.3.1
[INFO] [stderr]     Checking tokio-rustls v0.13.1
[INFO] [stderr]     Checking rustls-native-certs v0.3.0
[INFO] [stderr]     Checking h2 v0.2.5
[INFO] [stderr]     Checking hyper v0.13.6
[INFO] [stderr]     Checking hyper-tls v0.4.3
[INFO] [stderr]     Checking hyper-rustls v0.20.0
[INFO] [stderr]     Checking azure_sdk_core v0.43.5
[INFO] [stderr]     Checking reqwest v0.10.6
[INFO] [stderr]     Checking oauth2 v3.0.0
[INFO] [stderr]  Documenting azure_sdk_auth_aad v0.47.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(async_closure)]
[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 `azure_sdk_auth_aad`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name azure_sdk_auth_aad 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 async_timer=/opt/rustwide/target/debug/deps/libasync_timer-f691345305da9d9d.rmeta --extern async_trait=/opt/rustwide/target/debug/deps/libasync_trait-f79336cc52ab8e69.so --extern azure_sdk_core=/opt/rustwide/target/debug/deps/libazure_sdk_core-36ad08c8c1750552.rmeta --extern chrono=/opt/rustwide/target/debug/deps/libchrono-32e15a6264d4fe2d.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-b0fe3a01a2f1b28e.rmeta --extern log=/opt/rustwide/target/debug/deps/liblog-f96ba0118540bef9.rmeta --extern oauth2=/opt/rustwide/target/debug/deps/liboauth2-7af3d99e08695af9.rmeta --extern reqwest=/opt/rustwide/target/debug/deps/libreqwest-c54e67dee6145b7d.rmeta --extern serde=/opt/rustwide/target/debug/deps/libserde-7109607cf2b19640.rmeta --extern serde_derive=/opt/rustwide/target/debug/deps/libserde_derive-92d1fb13e3624470.so --extern serde_json=/opt/rustwide/target/debug/deps/libserde_json-c7d42db1861906e0.rmeta --extern thiserror=/opt/rustwide/target/debug/deps/libthiserror-80f8c5136a54efb4.rmeta --extern url=/opt/rustwide/target/debug/deps/liburl-f1cdd9ae9e3aedbe.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "9b18a84e7bb7b6e2bb6bb8450b98ff0fff0cdfe25a43b3aee2ef4d31041dd86d", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9b18a84e7bb7b6e2bb6bb8450b98ff0fff0cdfe25a43b3aee2ef4d31041dd86d", kill_on_drop: false }`
[INFO] [stdout] 9b18a84e7bb7b6e2bb6bb8450b98ff0fff0cdfe25a43b3aee2ef4d31041dd86d