[INFO] cloning repository https://github.com/gugahoa/ww-subscribe
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/gugahoa/ww-subscribe" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgugahoa%2Fww-subscribe", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgugahoa%2Fww-subscribe'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 53eb69877330b1d117e6f155f80add6fb3d3d02e
[INFO] documenting gugahoa/ww-subscribe against 1.46.0 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fgugahoa%2Fww-subscribe" "/workspace/builds/worker-9/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-9/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/gugahoa/ww-subscribe on toolchain 1.46.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/gugahoa/ww-subscribe
[INFO] finished tweaking git repo https://github.com/gugahoa/ww-subscribe
[INFO] tweaked toml for git repo https://github.com/gugahoa/ww-subscribe written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/gugahoa/ww-subscribe already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.46.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1.46.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 19cc7ebafc56505e4e7aa40d82a60ffaab87fcedc77b0eac894354f20cbca519
[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" "19cc7ebafc56505e4e7aa40d82a60ffaab87fcedc77b0eac894354f20cbca519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "19cc7ebafc56505e4e7aa40d82a60ffaab87fcedc77b0eac894354f20cbca519", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "19cc7ebafc56505e4e7aa40d82a60ffaab87fcedc77b0eac894354f20cbca519", kill_on_drop: false }`
[INFO] [stdout] 19cc7ebafc56505e4e7aa40d82a60ffaab87fcedc77b0eac894354f20cbca519
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-9/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" "+1.46.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] f4547dd6664fc534ff04f0e57dbe98f79666f18eaaca210886074e20ae0e8de0
[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" "f4547dd6664fc534ff04f0e57dbe98f79666f18eaaca210886074e20ae0e8de0", 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 libc v0.2.51
[INFO] [stderr]    Compiling cc v1.0.35
[INFO] [stderr]    Compiling proc-macro2 v0.4.28
[INFO] [stderr]    Compiling syn v0.15.32
[INFO] [stderr]    Compiling openssl v0.10.20
[INFO] [stderr]    Compiling ident_case v1.0.1
[INFO] [stderr]    Compiling derive_builder v0.7.1
[INFO] [stderr]    Compiling backtrace v0.3.15
[INFO] [stderr]    Compiling unicase v2.3.0
[INFO] [stderr]     Checking crossbeam-utils v0.2.2
[INFO] [stderr]     Checking try_from v0.3.2
[INFO] [stderr]     Checking miniz_oxide v0.2.1
[INFO] [stderr]    Compiling log v0.4.6
[INFO] [stderr]     Checking crc32fast v1.2.0
[INFO] [stderr]     Checking pq-sys v0.4.6
[INFO] [stderr]     Checking encoding_rs v0.8.17
[INFO] [stderr]     Checking rand_chacha v0.1.1
[INFO] [stderr]    Compiling rand_pcg v0.1.2
[INFO] [stderr]     Checking aho-corasick v0.6.10
[INFO] [stderr]     Checking erased-serde v0.3.9
[INFO] [stderr]     Checking serde_json v1.0.39
[INFO] [stderr]     Checking crossbeam-epoch v0.3.1
[INFO] [stderr]     Checking serde_urlencoded v0.5.5
[INFO] [stderr]    Compiling telebot-derive v0.0.12
[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/telebot-derive-0.0.12/src/lib.rs:1:5
[INFO] [stdout]   |
[INFO] [stdout] 1 |     #![feature(try_from)]
[INFO] [stdout]   |     ^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking regex v0.2.11
[INFO] [stderr]     Checking mime v0.3.13
[INFO] [stderr]     Checking crossbeam-deque v0.2.0
[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 `telebot-derive`.
[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" "f4547dd6664fc534ff04f0e57dbe98f79666f18eaaca210886074e20ae0e8de0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f4547dd6664fc534ff04f0e57dbe98f79666f18eaaca210886074e20ae0e8de0", kill_on_drop: false }`
[INFO] [stdout] f4547dd6664fc534ff04f0e57dbe98f79666f18eaaca210886074e20ae0e8de0