[INFO] cloning repository https://github.com/anshulrgoyal/bust
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/anshulrgoyal/bust" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] b0f07f4270f736f075af0424473e72cc19622aaa
[INFO] documenting anshulrgoyal/bust against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fanshulrgoyal%2Fbust" "/workspace/builds/worker-0/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-0/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/anshulrgoyal/bust 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 git repo https://github.com/anshulrgoyal/bust
[INFO] finished tweaking git repo https://github.com/anshulrgoyal/bust
[INFO] tweaked toml for git repo https://github.com/anshulrgoyal/bust written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/anshulrgoyal/bust 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] [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-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] fe2126a993f17c215d0335ecd0f3ed2eeee8eed97f6326a2c8dc70c7281770c7
[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" "fe2126a993f17c215d0335ecd0f3ed2eeee8eed97f6326a2c8dc70c7281770c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe2126a993f17c215d0335ecd0f3ed2eeee8eed97f6326a2c8dc70c7281770c7", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe2126a993f17c215d0335ecd0f3ed2eeee8eed97f6326a2c8dc70c7281770c7", kill_on_drop: false }`
[INFO] [stdout] fe2126a993f17c215d0335ecd0f3ed2eeee8eed97f6326a2c8dc70c7281770c7
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-0/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] 329f918e5e21d6cbc41c08bafc14d6df12207468495274db3595ffe60a39f959
[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" "329f918e5e21d6cbc41c08bafc14d6df12207468495274db3595ffe60a39f959", kill_on_drop: false }`
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]     Checking smallvec v1.2.0
[INFO] [stderr]    Compiling openssl v0.10.28
[INFO] [stderr]     Checking ansi_term v0.7.5
[INFO] [stderr]    Compiling anyhow v1.0.28
[INFO] [stderr]     Checking strum v0.8.0
[INFO] [stderr]     Checking encode_unicode v0.3.6
[INFO] [stderr]    Compiling openssl-sys v0.9.54
[INFO] [stderr]     Checking http v0.2.1
[INFO] [stderr]    Compiling syn v0.11.11
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking hostname v0.3.1
[INFO] [stderr]     Checking dirs v1.0.5
[INFO] [stderr]     Checking regex-automata v0.1.9
[INFO] [stderr]     Checking csv-core v0.1.10
[INFO] [stderr]     Checking mio v0.6.21
[INFO] [stderr]    Compiling mime_guess v2.0.3
[INFO] [stderr]     Checking resolv-conf v0.6.3
[INFO] [stderr]     Checking term v0.5.2
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking unicode-normalization v0.1.12
[INFO] [stderr]     Checking term v0.6.1
[INFO] [stderr]     Checking bstr v0.2.12
[INFO] [stderr]     Checking spinner v0.5.0
[INFO] [stderr]    Compiling native-tls v0.2.4
[INFO] [stderr]     Checking csv v1.1.3
[INFO] [stderr]     Checking idna v0.2.0
[INFO] [stderr]    Compiling strum_macros v0.8.0
[INFO] [stderr]     Checking url v2.1.1
[INFO] [stderr]     Checking prettytable-rs v0.8.0
[INFO] [stderr]     Checking spinners v1.2.0
[INFO] [stderr]    Compiling futures-macro v0.3.4
[INFO] [stderr]    Compiling tokio-macros v0.2.5
[INFO] [stderr]    Compiling thiserror-impl v1.0.14
[INFO] [stderr]    Compiling async-trait v0.1.29
[INFO] [stderr]    Compiling enum-as-inner v0.3.2
[INFO] [stderr]    Compiling argh_derive v0.1.1
[INFO] [stderr]     Checking tokio v0.2.16
[INFO] [stderr]     Checking futures-util v0.3.4
[INFO] [stderr]     Checking thiserror v1.0.14
[INFO] [stderr]     Checking argh v0.1.3
[INFO] [stderr]     Checking tokio-tls v0.3.0
[INFO] [stderr]     Checking futures-executor v0.3.4
[INFO] [stderr]     Checking futures v0.3.4
[INFO] [stderr]     Checking trust-dns-proto v0.19.3
[INFO] [stderr]     Checking trust-dns-resolver v0.19.3
[INFO] [stderr]  Documenting bust v0.1.0 (/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(test)]
[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 `bust`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type bin --crate-name bust 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 anyhow=/opt/rustwide/target/debug/deps/libanyhow-8f6ce0f93ec1bcae.rmeta --extern argh=/opt/rustwide/target/debug/deps/libargh-a3a77e0df257e1ba.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-c8f685c0cbb56a99.rmeta --extern http=/opt/rustwide/target/debug/deps/libhttp-ad35385836ff33e2.rmeta --extern mime=/opt/rustwide/target/debug/deps/libmime-25d054e954edca2b.rmeta --extern mime_guess=/opt/rustwide/target/debug/deps/libmime_guess-97756110b05aefd4.rmeta --extern native_tls=/opt/rustwide/target/debug/deps/libnative_tls-9a94bb7d65a0c5d9.rmeta --extern prettytable=/opt/rustwide/target/debug/deps/libprettytable-56c13f1fe1dae41e.rmeta --extern spinners=/opt/rustwide/target/debug/deps/libspinners-38a2ab2aa0bcc97b.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-8858cab01050b65c.rmeta --extern tokio_tls=/opt/rustwide/target/debug/deps/libtokio_tls-0a7fd7315d81194e.rmeta --extern trust_dns_resolver=/opt/rustwide/target/debug/deps/libtrust_dns_resolver-e1267c23fa9478d3.rmeta --cap-lints=warn` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "329f918e5e21d6cbc41c08bafc14d6df12207468495274db3595ffe60a39f959", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "329f918e5e21d6cbc41c08bafc14d6df12207468495274db3595ffe60a39f959", kill_on_drop: false }`
[INFO] [stdout] 329f918e5e21d6cbc41c08bafc14d6df12207468495274db3595ffe60a39f959