[INFO] cloning repository https://github.com/nilq/hugorm
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nilq/hugorm" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fhugorm", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnilq%2Fhugorm'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] e93fc25e6f46d56686aafa8c2c6f0cbdffdd6376
[INFO] documenting nilq/hugorm 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%2Fnilq%2Fhugorm" "/workspace/builds/worker-6/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-6/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nilq/hugorm 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/nilq/hugorm
[INFO] finished tweaking git repo https://github.com/nilq/hugorm
[INFO] tweaked toml for git repo https://github.com/nilq/hugorm written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/nilq/hugorm 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]  Downloading crates ...
[INFO] [stderr]   Downloaded hashbrown v0.7.2
[INFO] [stderr]   Downloaded serde_json v1.0.52
[INFO] [stderr]   Downloaded statrs v0.12.0
[INFO] [stderr]   Downloaded sized-chunks v0.5.3
[INFO] [stderr]   Downloaded syn v1.0.19
[INFO] [stderr]   Downloaded rand_xoshiro v0.4.0
[INFO] [stderr]   Downloaded bitmaps v2.1.0
[INFO] [stderr]   Downloaded rustyline v6.1.2
[INFO] [stderr]   Downloaded zub v0.3.14
[INFO] [stderr]   Downloaded im-rc v14.3.0
[INFO] [stderr]   Downloaded gag v0.1.10
[INFO] [stderr]   Downloaded flame v0.2.2
[INFO] [stderr]   Downloaded rustyline-derive v0.3.1
[INFO] [stderr]   Downloaded utf8parse v0.2.0
[INFO] [stderr]   Downloaded flamer v0.3.0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] eb73527dc82d3088b7661319737d76beb435395fda657c7df4a8d4b7d4532256
[INFO] running `Command { std: "docker" "start" "-a" "eb73527dc82d3088b7661319737d76beb435395fda657c7df4a8d4b7d4532256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "eb73527dc82d3088b7661319737d76beb435395fda657c7df4a8d4b7d4532256", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "eb73527dc82d3088b7661319737d76beb435395fda657c7df4a8d4b7d4532256", kill_on_drop: false }`
[INFO] [stdout] eb73527dc82d3088b7661319737d76beb435395fda657c7df4a8d4b7d4532256
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-6/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] a065e053a87b5596b4b52c6a53560c9824f7e0c0c9a8cf4721cd507a9de6c57e
[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" "a065e053a87b5596b4b52c6a53560c9824f7e0c0c9a8cf4721cd507a9de6c57e", kill_on_drop: false }`
[INFO] [stderr]    Compiling libc v0.2.66
[INFO] [stderr]    Compiling serde v1.0.106
[INFO] [stderr]    Compiling syn v1.0.19
[INFO] [stderr]    Compiling proc-macro2 v0.4.30
[INFO] [stderr]    Compiling syn v0.15.44
[INFO] [stderr]    Compiling itoa v0.4.5
[INFO] [stderr]    Compiling memchr v2.3.2
[INFO] [stderr]     Checking ahash v0.3.2
[INFO] [stderr]     Checking utf8parse v0.2.0
[INFO] [stderr]    Compiling im-rc v14.3.0
[INFO] [stderr]    Compiling ryu v1.0.4
[INFO] [stderr]    Compiling hashbrown v0.7.2
[INFO] [stderr]     Checking bitmaps v2.1.0
[INFO] [stderr]    Compiling quote v0.6.13
[INFO] [stderr]    Compiling thread-id v3.3.0
[INFO] [stderr]     Checking sized-chunks v0.5.3
[INFO] [stderr]     Checking getrandom v0.1.14
[INFO] [stderr]     Checking atty v0.2.14
[INFO] [stderr]     Checking dirs-sys v0.3.4
[INFO] [stderr]     Checking nix v0.17.0
[INFO] [stderr]     Checking colored v1.9.3
[INFO] [stderr]     Checking dirs v2.0.2
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking rand_chacha v0.2.2
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]    Compiling serde_derive v1.0.106
[INFO] [stderr]    Compiling rustyline-derive v0.3.1
[INFO] [stderr]     Checking rand v0.7.3
[INFO] [stderr]     Checking tempfile v3.1.0
[INFO] [stderr]     Checking statrs v0.12.0
[INFO] [stderr]     Checking gag v0.1.10
[INFO] [stderr]     Checking rustyline v6.1.2
[INFO] [stderr]    Compiling serde_json v1.0.52
[INFO] [stderr]    Compiling flame v0.2.2
[INFO] [stderr]    Compiling flamer v0.3.0
[INFO] [stderr]     Checking zub v0.3.14
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> /opt/rustwide/cargo-home/registry/src/github.com-1ecc6299db9ec823/zub-0.3.14/src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(vec_drain_as_slice)]
[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 `zub`.
[INFO] [stderr] 
[INFO] [stderr] To learn more, run the command again with --verbose.
[INFO] running `Command { std: "docker" "inspect" "a065e053a87b5596b4b52c6a53560c9824f7e0c0c9a8cf4721cd507a9de6c57e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a065e053a87b5596b4b52c6a53560c9824f7e0c0c9a8cf4721cd507a9de6c57e", kill_on_drop: false }`
[INFO] [stdout] a065e053a87b5596b4b52c6a53560c9824f7e0c0c9a8cf4721cd507a9de6c57e