[INFO] fetching crate tw-rs 0.1.34...
[INFO] documenting tw-rs-0.1.34 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate tw-rs 0.1.34 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate tw-rs 0.1.34 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 tw-rs 0.1.34
[INFO] finished tweaking crates.io crate tw-rs 0.1.34
[INFO] tweaked toml for crates.io crate tw-rs 0.1.34 written to /workspace/builds/worker-2/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.54.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] fe17d4c40d364f1848437efccdf51e0367351b828a2b21f7e79ab09b7dc34d4c
[INFO] running `Command { std: "docker" "start" "-a" "fe17d4c40d364f1848437efccdf51e0367351b828a2b21f7e79ab09b7dc34d4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "fe17d4c40d364f1848437efccdf51e0367351b828a2b21f7e79ab09b7dc34d4c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "fe17d4c40d364f1848437efccdf51e0367351b828a2b21f7e79ab09b7dc34d4c", kill_on_drop: false }`
[INFO] [stdout] fe17d4c40d364f1848437efccdf51e0367351b828a2b21f7e79ab09b7dc34d4c
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-2/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] 43797fe1c1ac6c0bc7328cd2a8fb9f3e1b679d3c5ef02ff6fba03ca28badf632
[INFO] running `Command { std: "docker" "start" "-a" "43797fe1c1ac6c0bc7328cd2a8fb9f3e1b679d3c5ef02ff6fba03ca28badf632", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.98
[INFO] [stderr]    Compiling gcc v0.3.55
[INFO] [stderr]     Checking rustc-serialize v0.3.24
[INFO] [stderr]     Checking percent-encoding v1.0.1
[INFO] [stderr]     Checking yaml-rust v0.3.5
[INFO] [stderr]    Compiling libz-sys v1.1.3
[INFO] [stderr]    Compiling openssl-sys v0.7.17
[INFO] [stderr]     Checking base64 v0.5.2
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]     Checking log v0.3.9
[INFO] [stderr]     Checking url v1.7.2
[INFO] [stderr]    Compiling curl-sys v0.2.5
[INFO] [stderr]    Compiling rust-crypto v0.2.36
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking memchr v1.0.2
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking clap v2.33.3
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking rand v0.3.23
[INFO] [stderr]     Checking curl v0.3.11
[INFO] [stderr]     Checking oauth-client-fix v0.1.5
[INFO] [stderr]     Checking tw-rs v0.1.34 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting tw-rs v0.1.34 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![feature(test)]
[INFO] [stdout]    | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:13:1
[INFO] [stdout]    |
[INFO] [stdout] 13 | #![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 `tw-rs`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name tweet 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 base64=/opt/rustwide/target/debug/deps/libbase64-97632bd3e88a35c9.rmeta --extern clap=/opt/rustwide/target/debug/deps/libclap-1bf05e32a77450bc.rmeta --extern colored=/opt/rustwide/target/debug/deps/libcolored-906acac2985e57be.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-8b227829c70991dc.rmeta --extern oauth_client_fix=/opt/rustwide/target/debug/deps/liboauth_client_fix-a5d8d65460ffed96.rmeta --cap-lints=warn --crate-version 0.1.34` (exit status: 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" "43797fe1c1ac6c0bc7328cd2a8fb9f3e1b679d3c5ef02ff6fba03ca28badf632", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43797fe1c1ac6c0bc7328cd2a8fb9f3e1b679d3c5ef02ff6fba03ca28badf632", kill_on_drop: false }`
[INFO] [stdout] 43797fe1c1ac6c0bc7328cd2a8fb9f3e1b679d3c5ef02ff6fba03ca28badf632
