[INFO] cloning repository https://github.com/red75prime/uftserver
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/red75prime/uftserver" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fred75prime%2Fuftserver", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fred75prime%2Fuftserver'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 3daabef9c9962cd1190983fa27a5dc70a460aef3
[INFO] documenting red75prime/uftserver 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%2Fred75prime%2Fuftserver" "/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/red75prime/uftserver 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/red75prime/uftserver
[INFO] finished tweaking git repo https://github.com/red75prime/uftserver
[INFO] tweaked toml for git repo https://github.com/red75prime/uftserver written to /workspace/builds/worker-0/source/Cargo.toml
[INFO] crate git repo https://github.com/red75prime/uftserver 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] 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" "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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] ae74d875d94ea96664a0757ec88afd2b3781f1b31042ec5b2fc112fd5b1b670b
[INFO] running `Command { std: "docker" "start" "-a" "ae74d875d94ea96664a0757ec88afd2b3781f1b31042ec5b2fc112fd5b1b670b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "ae74d875d94ea96664a0757ec88afd2b3781f1b31042ec5b2fc112fd5b1b670b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "ae74d875d94ea96664a0757ec88afd2b3781f1b31042ec5b2fc112fd5b1b670b", kill_on_drop: false }`
[INFO] [stdout] ae74d875d94ea96664a0757ec88afd2b3781f1b31042ec5b2fc112fd5b1b670b
[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" "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] 93fb3b45f93d3ebd047904fc3d6443f6a2574765bef985767a25cf2f343ddb0a
[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" "93fb3b45f93d3ebd047904fc3d6443f6a2574765bef985767a25cf2f343ddb0a", kill_on_drop: false }`
[INFO] [stderr]     Checking tokio-timer v0.1.2
[INFO] [stderr]     Checking tokio-io v0.1.5
[INFO] [stderr]     Checking mio v0.6.13
[INFO] [stderr]     Checking backtrace v0.3.5
[INFO] [stderr]     Checking failure v0.1.1
[INFO] [stderr]     Checking tokio v0.1.0
[INFO] [stderr]  Documenting uftserver 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(conservative_impl_trait)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove the attribute
[INFO] [stdout]   |
[INFO] [stdout]   = help: the feature `conservative_impl_trait` has been stable since 1.26.0 and no longer requires an attribute to enable
[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 `uftserver`
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --crate-type bin --crate-name uftserver 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 byteorder=/opt/rustwide/target/debug/deps/libbyteorder-bec697bf6f94f4e4.rmeta --extern bytes=/opt/rustwide/target/debug/deps/libbytes-59e396074711e7e6.rmeta --extern failure=/opt/rustwide/target/debug/deps/libfailure-3cfd2be17a29a788.rmeta --extern futures=/opt/rustwide/target/debug/deps/libfutures-e344dd47d8fcbe18.rmeta --extern futures_cpupool=/opt/rustwide/target/debug/deps/libfutures_cpupool-29ded800704a83a2.rmeta --extern rand=/opt/rustwide/target/debug/deps/librand-6e5bfda8c3d5e48c.rmeta --extern tokio=/opt/rustwide/target/debug/deps/libtokio-16c2b1a9dce65365.rmeta --extern tokio_io=/opt/rustwide/target/debug/deps/libtokio_io-d7aff41d5240b169.rmeta --extern tokio_timer=/opt/rustwide/target/debug/deps/libtokio_timer-d85fc32e81c597c4.rmeta --cap-lints=warn --crate-version 0.1.0` (exit status: 1)
[INFO] running `Command { std: "docker" "inspect" "93fb3b45f93d3ebd047904fc3d6443f6a2574765bef985767a25cf2f343ddb0a", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "93fb3b45f93d3ebd047904fc3d6443f6a2574765bef985767a25cf2f343ddb0a", kill_on_drop: false }`
[INFO] [stdout] 93fb3b45f93d3ebd047904fc3d6443f6a2574765bef985767a25cf2f343ddb0a
