[INFO] fetching crate cheddar 0.2.1...
[INFO] documenting cheddar-0.2.1 against 1.47.0 for beta-1.48-rustdoc-1
[INFO] extracting crate cheddar 0.2.1 into /workspace/builds/worker-14/source
[INFO] validating manifest of crates.io crate cheddar 0.2.1 on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking crates.io crate cheddar 0.2.1
[INFO] finished tweaking crates.io crate cheddar 0.2.1
[INFO] tweaked toml for crates.io crate cheddar 0.2.1 written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "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" "+1.47.0" "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] bcc5431be6201b9e140b664739701b3ef24aeb0cdddaa10cbc8316883ca4daf6
[INFO] running `Command { std: "docker" "start" "-a" "bcc5431be6201b9e140b664739701b3ef24aeb0cdddaa10cbc8316883ca4daf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "bcc5431be6201b9e140b664739701b3ef24aeb0cdddaa10cbc8316883ca4daf6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "bcc5431be6201b9e140b664739701b3ef24aeb0cdddaa10cbc8316883ca4daf6", kill_on_drop: false }`
[INFO] [stdout] bcc5431be6201b9e140b664739701b3ef24aeb0cdddaa10cbc8316883ca4daf6
[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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 6d7390ea946a04d0df313db3ce5e22986dbce0894d34b23fc1260c798be40ba9
[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" "6d7390ea946a04d0df313db3ce5e22986dbce0894d34b23fc1260c798be40ba9", kill_on_drop: false }`
[INFO] [stderr]     Checking any-cache v0.2.3
[INFO] [stderr]     Checking inotify-sys v0.1.3
[INFO] [stderr]     Checking filetime v0.2.12
[INFO] [stderr]     Checking nom v3.2.1
[INFO] [stderr]     Checking mio v0.6.22
[INFO] [stderr]     Checking inotify v0.7.1
[INFO] [stderr]     Checking mio-extras v2.0.6
[INFO] [stderr]     Checking notify v4.0.15
[INFO] [stderr]     Checking glsl v0.9.2
[INFO] [stderr]     Checking warmy v0.10.0
[INFO] [stderr]  Documenting cheddar v0.2.1 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> src/lib.rs:257:1
[INFO] [stdout]     |
[INFO] [stdout] 257 | #![feature(box_syntax)]
[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:258:1
[INFO] [stdout]     |
[INFO] [stdout] 258 | #![feature(box_patterns)]
[INFO] [stdout]     | ^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: aborting due to 3 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 `cheddar`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name cheddar 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 glsl=/opt/rustwide/target/debug/deps/libglsl-a8e2f17da4f06dca.rmeta --extern nom=/opt/rustwide/target/debug/deps/libnom-12366c3799f0dcf1.rmeta --extern warmy=/opt/rustwide/target/debug/deps/libwarmy-d74da45f85410e80.rmeta --cap-lints=warn --crate-version 0.2.1` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "6d7390ea946a04d0df313db3ce5e22986dbce0894d34b23fc1260c798be40ba9", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "6d7390ea946a04d0df313db3ce5e22986dbce0894d34b23fc1260c798be40ba9", kill_on_drop: false }`
[INFO] [stdout] 6d7390ea946a04d0df313db3ce5e22986dbce0894d34b23fc1260c798be40ba9
