[INFO] cloning repository https://github.com/flum1025/twistributer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/flum1025/twistributer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflum1025%2Ftwistributer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflum1025%2Ftwistributer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] d96f63663981d451ecbcb3190d9ea7fe4b513653
[INFO] documenting flum1025/twistributer against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fflum1025%2Ftwistributer" "/workspace/builds/worker-14/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-14/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/flum1025/twistributer on toolchain beta-2020-08-29
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/flum1025/twistributer
[INFO] finished tweaking git repo https://github.com/flum1025/twistributer
[INFO] tweaked toml for git repo https://github.com/flum1025/twistributer written to /workspace/builds/worker-14/source/Cargo.toml
[INFO] crate git repo https://github.com/flum1025/twistributer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Updating git repository `https://github.com/rust-lang-nursery/rust-clippy`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded logger v0.4.0
[INFO] [stderr]   Downloaded reqwest v0.9.1
[INFO] [stderr]   Downloaded fern v0.5.6
[INFO] [stderr]   Downloaded users v0.7.0
[INFO] [stderr]   Downloaded cargo_metadata v0.6.0
[INFO] [stderr]   Downloaded serde_yaml v0.8.4
[INFO] [stderr]   Downloaded rust_info v0.1.15
[INFO] [stderr]   Downloaded run_script v0.1.20
[INFO] [stderr]   Downloaded ci_info v0.1.19
[INFO] [stderr]   Downloaded cargo-make v0.14.0
[INFO] [stderr]   Downloaded shell2batch v0.2.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] f08f1b5d2881d1b8fd6dff98db38dad2d95bb7912dc87fc66ed3ba006cc104eb
[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" "f08f1b5d2881d1b8fd6dff98db38dad2d95bb7912dc87fc66ed3ba006cc104eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "f08f1b5d2881d1b8fd6dff98db38dad2d95bb7912dc87fc66ed3ba006cc104eb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "f08f1b5d2881d1b8fd6dff98db38dad2d95bb7912dc87fc66ed3ba006cc104eb", kill_on_drop: false }`
[INFO] [stdout] f08f1b5d2881d1b8fd6dff98db38dad2d95bb7912dc87fc66ed3ba006cc104eb
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-14/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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 43e5062d0300833a611a1731faacbbc9bb358210ebc4f0bb67b6aa2ec4c72b2b
[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" "43e5062d0300833a611a1731faacbbc9bb358210ebc4f0bb67b6aa2ec4c72b2b", kill_on_drop: false }`
[INFO] [stderr]    Compiling version_check v0.1.4
[INFO] [stderr]    Compiling serde v1.0.79
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]     Checking futures v0.1.24
[INFO] [stderr]    Compiling cc v1.0.25
[INFO] [stderr]     Checking rand_core v0.2.1
[INFO] [stderr]     Checking crossbeam-utils v0.5.0
[INFO] [stderr]     Checking slab v0.4.1
[INFO] [stderr]     Checking lazycell v1.2.0
[INFO] [stderr]    Compiling ryu v0.2.6
[INFO] [stderr]    Compiling httparse v1.3.2
[INFO] [stderr]    Compiling proc-macro2 v0.4.19
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]     Checking unicode-normalization v0.1.7
[INFO] [stderr]    Compiling typenum v1.10.0
[INFO] [stderr]     Checking itoa v0.4.3
[INFO] [stderr]     Checking safemem v0.2.0
[INFO] [stderr]    Compiling rustc-demangle v0.1.9
[INFO] [stderr]    Compiling openssl v0.10.12
[INFO] [stderr]    Compiling regex v1.0.5
[INFO] [stderr]    Compiling pulldown-cmark v0.1.2
[INFO] [stderr]    Compiling unicode-width v0.1.5
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]     Checking string v0.1.1
[INFO] [stderr]    Compiling native-tls v0.2.1
[INFO] [stderr]    Compiling gcc v0.3.54
[INFO] [stderr]    Compiling either v1.5.0
[INFO] [stderr]     Checking dtoa v0.4.3
[INFO] [stderr]    Compiling rustc_tools_util v0.1.0 (https://github.com/rust-lang-nursery/rust-clippy#c0c770c6)
[INFO] [stderr]     Checking byte-tools v0.2.0
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/rust-clippy-96f6c8ce0bc85cf5/c0c770c/rustc_tools_util/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(test)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/git/checkouts/rust-clippy-96f6c8ce0bc85cf5/c0c770c/rustc_tools_util/src/lib.rs:2:1
[INFO] [stdout]   |
[INFO] [stdout] 2 | #![feature(tool_lints)]
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]    Compiling quine-mc_cluskey v0.2.4
[INFO] [stderr]     Checking utf8-ranges v1.0.1
[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 compile `rustc_tools_util`.
[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" "43e5062d0300833a611a1731faacbbc9bb358210ebc4f0bb67b6aa2ec4c72b2b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "43e5062d0300833a611a1731faacbbc9bb358210ebc4f0bb67b6aa2ec4c72b2b", kill_on_drop: false }`
[INFO] [stdout] 43e5062d0300833a611a1731faacbbc9bb358210ebc4f0bb67b6aa2ec4c72b2b