[INFO] cloning repository https://github.com/rozgo/demux-rs
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rozgo/demux-rs" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frozgo%2Fdemux-rs", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frozgo%2Fdemux-rs'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d4344b0b316e8e7a7a56e1bc01e2f2a9e5ad0c0f
[INFO] documenting rozgo/demux-rs against 1.54.0 for beta-1.55-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frozgo%2Fdemux-rs" "/workspace/builds/worker-11/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-11/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/rozgo/demux-rs 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 git repo https://github.com/rozgo/demux-rs
[INFO] finished tweaking git repo https://github.com/rozgo/demux-rs
[INFO] tweaked toml for git repo https://github.com/rozgo/demux-rs written to /workspace/builds/worker-11/source/Cargo.toml
[INFO] crate git repo https://github.com/rozgo/demux-rs already has a lockfile, it will not be regenerated
[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] [stderr]     Updating git repository `https://github.com/rozgo/exonum.git`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded clicolors-control v0.2.0
[INFO] [stderr]   Downloaded tokio-io v0.1.9
[INFO] [stderr]   Downloaded zip v0.4.2
[INFO] [stderr]   Downloaded filetime v0.2.1
[INFO] [stderr]   Downloaded tokio-fs v0.1.3
[INFO] [stderr]   Downloaded console v0.6.2
[INFO] [stderr]   Downloaded num-bigint v0.2.0
[INFO] [stderr]   Downloaded h2 v0.1.12
[INFO] [stderr]   Downloaded syn v0.15.9
[INFO] [stderr]   Downloaded msdos_time v0.1.6
[INFO] [stderr]   Downloaded tar v0.4.17
[INFO] [stderr]   Downloaded indexmap v1.0.1
[INFO] [stderr]   Downloaded miniz_oxide_c_api v0.1.3
[INFO] [stderr]   Downloaded serde_derive v1.0.79
[INFO] [stderr]   Downloaded termios v0.3.1
[INFO] [stderr]   Downloaded miniz-sys v0.1.10
[INFO] [stderr]   Downloaded indicatif v0.9.0
[INFO] [stderr]   Downloaded flate2 v1.0.3
[INFO] [stderr]   Downloaded exonum_libsodium-sys v0.0.20
[INFO] [stderr]   Downloaded tokio-uds v0.2.2
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.7
[INFO] [stderr]   Downloaded rust_decimal v0.10.1
[INFO] [stderr]   Downloaded miniz_oxide v0.1.3
[INFO] [stderr]   Downloaded tokio-async-await v0.1.4
[INFO] [stderr]   Downloaded bzip2-sys v0.1.6
[INFO] [stderr]   Downloaded rayon v1.0.2
[INFO] [stderr]   Downloaded exonum_sodiumoxide v0.0.20
[INFO] [stderr]   Downloaded hyper v0.12.11
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 601be931a0be2e0de24507681c8b9cccfd951160b665b01dacacf2eb7cf61eac
[INFO] running `Command { std: "docker" "start" "-a" "601be931a0be2e0de24507681c8b9cccfd951160b665b01dacacf2eb7cf61eac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "601be931a0be2e0de24507681c8b9cccfd951160b665b01dacacf2eb7cf61eac", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "601be931a0be2e0de24507681c8b9cccfd951160b665b01dacacf2eb7cf61eac", kill_on_drop: false }`
[INFO] [stdout] 601be931a0be2e0de24507681c8b9cccfd951160b665b01dacacf2eb7cf61eac
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-11/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] 11d3178004aac3236af55aaef92bcceea0440da4f7f1d6c555f343b3ec32a2e2
[INFO] running `Command { std: "docker" "start" "-a" "11d3178004aac3236af55aaef92bcceea0440da4f7f1d6c555f343b3ec32a2e2", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Checking libc v0.2.43
[INFO] [stderr]     Checking cfg-if v0.1.5
[INFO] [stderr]    Compiling rayon-core v1.4.1
[INFO] [stderr]    Compiling rayon v1.0.2
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]     Checking futures v0.1.25
[INFO] [stderr]     Checking byteorder v1.2.6
[INFO] [stderr]     Checking rand_core v0.3.0
[INFO] [stderr]     Checking scopeguard v0.3.3
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]    Compiling build_const v0.2.1
[INFO] [stderr]     Checking stable_deref_trait v1.1.1
[INFO] [stderr]    Compiling num-traits v0.2.6
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]    Compiling adler32 v1.0.3
[INFO] [stderr]    Compiling num-integer v0.1.39
[INFO] [stderr]     Checking lazycell v1.2.0
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]     Checking nodrop v0.1.12
[INFO] [stderr]     Checking memoffset v0.2.1
[INFO] [stderr]    Compiling podio v0.1.6
[INFO] [stderr]    Compiling proc-macro2 v0.4.20
[INFO] [stderr]    Compiling num-bigint v0.2.0
[INFO] [stderr]    Compiling num-iter v0.1.37
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]    Compiling num-complex v0.2.1
[INFO] [stderr]    Compiling num-rational v0.2.1
[INFO] [stderr]    Compiling pkg-config v0.3.14
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]     Checking unicode-width v0.1.5
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]     Checking utf8-ranges v1.0.1
[INFO] [stderr]    Compiling httparse v1.3.3
[INFO] [stderr]    Compiling regex v0.2.11
[INFO] [stderr]     Checking fnv v1.0.6
[INFO] [stderr]     Checking try-lock v0.2.2
[INFO] [stderr]     Checking string v0.1.1
[INFO] [stderr]     Checking indexmap v1.0.1
[INFO] [stderr]     Checking bitflags v1.0.4
[INFO] [stderr]     Checking vec_map v0.8.1
[INFO] [stderr]     Checking hex v0.3.2
[INFO] [stderr]     Checking uuid v0.7.1
[INFO] [stderr]     Checking strsim v0.7.0
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling memchr v2.1.0
[INFO] [stderr]    Compiling arrayvec v0.4.7
[INFO] [stderr]     Checking unreachable v1.0.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the stable release channel
[INFO] [stdout]    --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/futures-0.1.25/src/lib.rs:161:34
[INFO] [stdout]     |
[INFO] [stdout] 161 | #![cfg_attr(feature = "nightly", feature(pin))]
[INFO] [stdout]     |                                  ^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex-syntax v0.6.2
[INFO] [stderr]     Checking regex-syntax v0.5.6
[INFO] [stderr]     Checking log v0.4.5
[INFO] [stderr]     Checking textwrap v0.10.0
[INFO] [stderr]    Compiling crossbeam-utils v0.2.2
[INFO] [stderr]     Checking rand_core v0.2.2
[INFO] [stderr]     Checking owning_ref v0.3.3
[INFO] [stderr]    Compiling rustc_version v0.2.3
[INFO] [stderr]    Compiling crc v1.8.1
[INFO] [stderr]     Checking iovec v0.1.2
[INFO] [stderr]     Checking num_cpus v1.8.0
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking time v0.1.40
[INFO] [stderr]     Checking termios v0.3.1
[INFO] [stderr]     Checking clicolors-control v0.2.0
[INFO] [stderr]     Checking smallvec v0.6.5
[INFO] [stderr]     Checking rand v0.5.5
[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: could not compile `futures`
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] [stderr] warning: build failed, waiting for other jobs to finish...
[INFO] [stderr] error: build failed
[INFO] running `Command { std: "docker" "inspect" "11d3178004aac3236af55aaef92bcceea0440da4f7f1d6c555f343b3ec32a2e2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "11d3178004aac3236af55aaef92bcceea0440da4f7f1d6c555f343b3ec32a2e2", kill_on_drop: false }`
[INFO] [stdout] 11d3178004aac3236af55aaef92bcceea0440da4f7f1d6c555f343b3ec32a2e2
