[INFO] fetching crate oursh 0.2.0...
[INFO] documenting oursh-0.2.0 against 1.54.0 for beta-1.55-rustdoc-1
[INFO] extracting crate oursh 0.2.0 into /workspace/builds/worker-2/source
[INFO] validating manifest of crates.io crate oursh 0.2.0 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] removed /workspace/builds/worker-2/source/rust-toolchain
[INFO] started tweaking crates.io crate oursh 0.2.0
[INFO] finished tweaking crates.io crate oursh 0.2.0
[INFO] tweaked toml for crates.io crate oursh 0.2.0 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] [stderr]     Blocking waiting for file lock on package cache
[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] 18d68901b37fb636d1a3ecd6c100b6c8e98d59af1ee969abfe956606779ad30c
[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" "18d68901b37fb636d1a3ecd6c100b6c8e98d59af1ee969abfe956606779ad30c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "18d68901b37fb636d1a3ecd6c100b6c8e98d59af1ee969abfe956606779ad30c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "18d68901b37fb636d1a3ecd6c100b6c8e98d59af1ee969abfe956606779ad30c", kill_on_drop: false }`
[INFO] [stdout] 18d68901b37fb636d1a3ecd6c100b6c8e98d59af1ee969abfe956606779ad30c
[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] d5ce563598bc1b2c1c1a4277ec94fb0b59070a4071c2eec0625cd12086b661e8
[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" "d5ce563598bc1b2c1c1a4277ec94fb0b59070a4071c2eec0625cd12086b661e8", kill_on_drop: false }`
[INFO] [stderr]    Compiling string_cache_shared v0.3.0
[INFO] [stderr]    Compiling byte-tools v0.3.1
[INFO] [stderr]    Compiling byteorder v1.4.3
[INFO] [stderr]    Compiling ordermap v0.3.5
[INFO] [stderr]    Compiling fixedbitset v0.1.9
[INFO] [stderr]    Compiling opaque-debug v0.2.3
[INFO] [stderr]    Compiling fake-simd v0.1.2
[INFO] [stderr]    Compiling bit-vec v0.6.3
[INFO] [stderr]    Compiling lalrpop-util v0.16.3
[INFO] [stderr]     Checking utf8 v0.0.2
[INFO] [stderr]    Compiling ascii-canvas v1.0.0
[INFO] [stderr]    Compiling itertools v0.8.2
[INFO] [stderr]    Compiling generic-array v0.12.4
[INFO] [stderr]    Compiling ena v0.11.0
[INFO] [stderr]    Compiling phf_generator v0.7.24
[INFO] [stderr]    Compiling serde v1.0.127
[INFO] [stderr]    Compiling block-padding v0.1.5
[INFO] [stderr]     Checking docopt v0.8.3
[INFO] [stderr]     Checking pwd v1.3.1
[INFO] [stderr]    Compiling string_cache_codegen v0.4.4
[INFO] [stderr]    Compiling bit-set v0.5.2
[INFO] [stderr]    Compiling digest v0.8.1
[INFO] [stderr]    Compiling block-buffer v0.7.3
[INFO] [stderr]    Compiling sha2 v0.8.2
[INFO] [stderr]    Compiling petgraph v0.4.13
[INFO] [stderr]    Compiling string_cache v0.7.5
[INFO] [stderr]    Compiling docopt v1.1.1
[INFO] [stderr]    Compiling lalrpop v0.16.3
[INFO] [stderr]    Compiling oursh v0.2.0 (/opt/rustwide/workdir)
[INFO] [stderr]  Documenting oursh v0.2.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]   --> src/lib.rs:77:1
[INFO] [stdout]    |
[INFO] [stdout] 77 | #![feature(alloc_system, box_syntax, 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 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 `oursh`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type lib --crate-name oursh src/lib.rs -o /opt/rustwide/target/doc --cfg 'feature="default"' --cfg 'feature="history"' --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern docopt=/opt/rustwide/target/debug/deps/libdocopt-44f826948ce9d41a.rmeta --extern lalrpop_util=/opt/rustwide/target/debug/deps/liblalrpop_util-6a21a912ae1fa5d1.rmeta --extern nix=/opt/rustwide/target/debug/deps/libnix-3d24733070a839d1.rmeta --extern pwd=/opt/rustwide/target/debug/deps/libpwd-40cc006f19d63fe8.rmeta --extern regex=/opt/rustwide/target/debug/deps/libregex-f5cb222ddd7062a0.rmeta --extern termion=/opt/rustwide/target/debug/deps/libtermion-739a5e504c153c3f.rmeta --extern utf8=/opt/rustwide/target/debug/deps/libutf8-99be2808d0425c75.rmeta --cap-lints=warn --crate-version 0.2.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "d5ce563598bc1b2c1c1a4277ec94fb0b59070a4071c2eec0625cd12086b661e8", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d5ce563598bc1b2c1c1a4277ec94fb0b59070a4071c2eec0625cd12086b661e8", kill_on_drop: false }`
[INFO] [stdout] d5ce563598bc1b2c1c1a4277ec94fb0b59070a4071c2eec0625cd12086b661e8
