[INFO] cloning repository https://github.com/Hanaasagi/mepuru
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/Hanaasagi/mepuru" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHanaasagi%2Fmepuru", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FHanaasagi%2Fmepuru'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 2a1e3ad7e8547292f63acd8e3328f67c1db5894e
[INFO] documenting Hanaasagi/mepuru 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%2FHanaasagi%2Fmepuru" "/workspace/builds/worker-1/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-1/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/Hanaasagi/mepuru 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/Hanaasagi/mepuru
[INFO] finished tweaking git repo https://github.com/Hanaasagi/mepuru
[INFO] tweaked toml for git repo https://github.com/Hanaasagi/mepuru written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate git repo https://github.com/Hanaasagi/mepuru 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 lazy_static v1.1.0
[INFO] [stderr]   Downloaded cfg-if v0.1.5
[INFO] [stderr]   Downloaded num-traits v0.2.6
[INFO] [stderr]   Downloaded proc-macro-hack v0.4.1
[INFO] [stderr]   Downloaded proc-macro-hack-impl v0.4.1
[INFO] [stderr]   Downloaded log v0.4.5
[INFO] [stderr]   Downloaded unicode-normalization v0.1.7
[INFO] [stderr]   Downloaded url v1.7.1
[INFO] [stderr]   Downloaded regex-syntax v0.6.2
[INFO] [stderr]   Downloaded libc v0.2.43
[INFO] [stderr]   Downloaded aho-corasick v0.6.8
[INFO] [stderr]   Downloaded memchr v2.1.0
[INFO] [stderr]   Downloaded spin v0.4.9
[INFO] [stderr]   Downloaded utf8-ranges v1.0.1
[INFO] [stderr]   Downloaded pyo3cls v0.4.1
[INFO] [stderr]   Downloaded mashup-impl v0.1.9
[INFO] [stderr]   Downloaded mashup v0.1.9
[INFO] [stderr]   Downloaded pyo3-derive-backend v0.4.1
[INFO] [stderr]   Downloaded pyo3 v0.4.1
[INFO] [stderr]   Downloaded regex v1.0.5
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 1376927755c9318bdc4c8812d181689cdbd323ae1ae6b95b8d5434792abbc92b
[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" "1376927755c9318bdc4c8812d181689cdbd323ae1ae6b95b8d5434792abbc92b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "1376927755c9318bdc4c8812d181689cdbd323ae1ae6b95b8d5434792abbc92b", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "1376927755c9318bdc4c8812d181689cdbd323ae1ae6b95b8d5434792abbc92b", kill_on_drop: false }`
[INFO] [stdout] 1376927755c9318bdc4c8812d181689cdbd323ae1ae6b95b8d5434792abbc92b
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-1/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] 742c43ea3dc93d81dd949b817059a7e7a0854defe136b6bf04597a68ae6eb82f
[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" "742c43ea3dc93d81dd949b817059a7e7a0854defe136b6bf04597a68ae6eb82f", kill_on_drop: false }`
[INFO] [stderr]    Compiling cfg-if v0.1.5
[INFO] [stderr]    Compiling libc v0.2.43
[INFO] [stderr]    Compiling ucd-util v0.1.1
[INFO] [stderr]    Compiling proc-macro-hack-impl v0.4.1
[INFO] [stderr]    Compiling utf8-ranges v1.0.1
[INFO] [stderr]     Checking spin v0.4.9
[INFO] [stderr]     Checking idna v0.1.5
[INFO] [stderr]    Compiling lazy_static v1.1.0
[INFO] [stderr]    Compiling syn v0.14.9
[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/spin-0.4.9/src/lib.rs:6:35
[INFO] [stdout]   |
[INFO] [stdout] 6 | #![cfg_attr(feature = "const_fn", feature(const_fn))]
[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 `spin`.
[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" "742c43ea3dc93d81dd949b817059a7e7a0854defe136b6bf04597a68ae6eb82f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "742c43ea3dc93d81dd949b817059a7e7a0854defe136b6bf04597a68ae6eb82f", kill_on_drop: false }`
[INFO] [stdout] 742c43ea3dc93d81dd949b817059a7e7a0854defe136b6bf04597a68ae6eb82f