[INFO] cloning repository https://github.com/infinyon/flv-kf-protocol
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/infinyon/flv-kf-protocol" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finfinyon%2Fflv-kf-protocol", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finfinyon%2Fflv-kf-protocol'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 04b880b6a73a0641d1a2a3427602123bd12b2678
[INFO] documenting infinyon/flv-kf-protocol against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Finfinyon%2Fflv-kf-protocol" "/workspace/builds/worker-5/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-5/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/infinyon/flv-kf-protocol 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 git repo https://github.com/infinyon/flv-kf-protocol
[INFO] removed path dependency kf-protocol-api from git repo https://github.com/infinyon/flv-kf-protocol
[INFO] removed path dependency kf-protocol-core from git repo https://github.com/infinyon/flv-kf-protocol
[INFO] removed path dependency kf-protocol-derive from git repo https://github.com/infinyon/flv-kf-protocol
[INFO] removed path dependency kf-protocol-fs from git repo https://github.com/infinyon/flv-kf-protocol
[INFO] removed path dependency kf-protocol-message from git repo https://github.com/infinyon/flv-kf-protocol
[INFO] removed path dependency kf-protocol-transport from git repo https://github.com/infinyon/flv-kf-protocol
[INFO] finished tweaking git repo https://github.com/infinyon/flv-kf-protocol
[INFO] tweaked toml for git repo https://github.com/infinyon/flv-kf-protocol written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] crate git repo https://github.com/infinyon/flv-kf-protocol already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating crates.io index
[INFO] [stderr] error: the lock file /workspace/builds/worker-5/source/Cargo.lock needs to be updated but --locked was passed to prevent this
[INFO] [stderr] If you want to try to generate the lock file without accessing the network, use the --offline flag.
[INFO] the lockfile is outdated, regenerating it
[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-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stdout] 668b1ab406e41a1b35baf1503ad40368475f466ad6dfe6f2de27b9abe9cf7118
[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" "668b1ab406e41a1b35baf1503ad40368475f466ad6dfe6f2de27b9abe9cf7118", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "668b1ab406e41a1b35baf1503ad40368475f466ad6dfe6f2de27b9abe9cf7118", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "668b1ab406e41a1b35baf1503ad40368475f466ad6dfe6f2de27b9abe9cf7118", kill_on_drop: false }`
[INFO] [stdout] 668b1ab406e41a1b35baf1503ad40368475f466ad6dfe6f2de27b9abe9cf7118
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 9275f4a78bd7532b5bac1f2f89586a765438b3d620d2097d703c655a62dd28f3
[INFO] running `Command { std: "docker" "start" "-a" "9275f4a78bd7532b5bac1f2f89586a765438b3d620d2097d703c655a62dd28f3", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling memchr v2.3.3
[INFO] [stderr]    Compiling crc32c v0.5.0
[INFO] [stderr]    Compiling nix v0.17.0
[INFO] [stderr]     Checking futures-timer v2.0.2
[INFO] [stderr]    Compiling paste-impl v0.1.18
[INFO] [stderr]     Checking regex v1.4.1
[INFO] [stderr]     Checking tokio v0.2.22
[INFO] [stderr]    Compiling log v0.4.11
[INFO] [stderr]     Checking time v0.1.44
[INFO] [stderr]     Checking nb-connect v1.0.2
[INFO] [stderr]     Checking memmap v0.7.0
[INFO] [stderr]     Checking polling v2.0.2
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking serde v1.0.117
[INFO] [stderr]     Checking chrono v0.4.19
[INFO] [stderr]     Checking paste v0.1.18
[INFO] [stderr]     Checking futures-lite v1.11.1
[INFO] [stderr]     Checking futures-util v0.3.6
[INFO] [stderr]     Checking content_inspector v0.2.4
[INFO] [stderr]    Compiling kf-protocol-derive v0.2.0
[INFO] [stderr]     Checking tokio-util v0.3.1
[INFO] [stderr]     Checking async-io v1.1.10
[INFO] [stderr]     Checking async-executor v1.3.0
[INFO] [stderr]     Checking blocking v1.0.2
[INFO] [stderr]     Checking async-global-executor v1.4.2
[INFO] [stderr]     Checking async-std v1.6.5
[INFO] [stderr]     Checking tracing-serde v0.1.2
[INFO] [stderr]     Checking serde_json v1.0.59
[INFO] [stderr]     Checking kf-protocol-core v0.1.2
[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/kf-protocol-core-0.1.2/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(specialization)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[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 `kf-protocol-core`.
[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" "9275f4a78bd7532b5bac1f2f89586a765438b3d620d2097d703c655a62dd28f3", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "9275f4a78bd7532b5bac1f2f89586a765438b3d620d2097d703c655a62dd28f3", kill_on_drop: false }`
[INFO] [stdout] 9275f4a78bd7532b5bac1f2f89586a765438b3d620d2097d703c655a62dd28f3
