[INFO] cloning repository https://github.com/OutThisLife/tos-book
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/OutThisLife/tos-book" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOutThisLife%2Ftos-book", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2FOutThisLife%2Ftos-book'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] ad3a51e9e8ead0da2b33529991c90ecb3dfc6afa
[INFO] documenting OutThisLife/tos-book 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%2FOutThisLife%2Ftos-book" "/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/OutThisLife/tos-book 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/OutThisLife/tos-book
[INFO] finished tweaking git repo https://github.com/OutThisLife/tos-book
[INFO] tweaked toml for git repo https://github.com/OutThisLife/tos-book written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate git repo https://github.com/OutThisLife/tos-book 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/milliams/plotlib`
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded v_htmlescape v0.3.2
[INFO] [stderr]   Downloaded svg v0.5.12
[INFO] [stderr]   Downloaded flate2 v1.0.6
[INFO] [stderr]   Downloaded actix v0.7.9
[INFO] [stderr]   Downloaded arc-swap v0.3.7
[INFO] [stderr]   Downloaded ipconfig v0.1.9
[INFO] [stderr]   Downloaded tokio-sync v0.1.3
[INFO] [stderr]   Downloaded h2 v0.1.16
[INFO] [stderr]   Downloaded tokio-current-thread v0.1.5
[INFO] [stderr]   Downloaded trust-dns-resolver v0.10.3
[INFO] [stderr]   Downloaded uuid v0.7.2
[INFO] [stderr]   Downloaded nom v4.2.2
[INFO] [stderr]   Downloaded crc32fast v1.1.2
[INFO] [stderr]   Downloaded macro-utils v0.1.2
[INFO] [stderr]   Downloaded actix-net v0.2.6
[INFO] [stderr]   Downloaded tokio-threadpool v0.1.12
[INFO] [stderr]   Downloaded tokio-executor v0.1.6
[INFO] [stderr]   Downloaded v_escape_derive v0.2.1
[INFO] [stderr]   Downloaded v_escape v0.3.2
[INFO] [stderr]   Downloaded maud_htmlescape v0.17.0
[INFO] [stderr]   Downloaded regex v1.1.2
[INFO] [stderr]   Downloaded http v0.1.16
[INFO] [stderr]   Downloaded backtrace v0.3.14
[INFO] [stderr]   Downloaded actix-web v0.7.18
[INFO] [stderr]   Downloaded literalext v0.1.1
[INFO] [stderr]   Downloaded cc v1.0.30
[INFO] [stderr]   Downloaded maud v0.20.0
[INFO] [stderr]   Downloaded trust-dns-proto v0.6.3
[INFO] [stderr]   Downloaded maud_macros v0.20.0
[INFO] [stderr]   Downloaded signal-hook v0.1.8
[INFO] [stderr]   Downloaded tokio v0.1.16
[INFO] [stderr]   Downloaded minifier v0.0.28
[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" "+beta-2020-08-29" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 594f2d29e0a6b4de41e7557228c8710e2e081a6d2dd51c5d64f9d23a47d0384c
[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" "594f2d29e0a6b4de41e7557228c8710e2e081a6d2dd51c5d64f9d23a47d0384c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "594f2d29e0a6b4de41e7557228c8710e2e081a6d2dd51c5d64f9d23a47d0384c", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "594f2d29e0a6b4de41e7557228c8710e2e081a6d2dd51c5d64f9d23a47d0384c", kill_on_drop: false }`
[INFO] [stdout] 594f2d29e0a6b4de41e7557228c8710e2e081a6d2dd51c5d64f9d23a47d0384c
[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" "+beta-2020-08-29" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 7653f9f2a7a6883d5a2e624de33cd3650de00285cdc0a327a07441ea4f5d6fbb
[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" "7653f9f2a7a6883d5a2e624de33cd3650de00285cdc0a327a07441ea4f5d6fbb", 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]    Compiling cc v1.0.30
[INFO] [stderr]     Checking arc-swap v0.3.7
[INFO] [stderr]    Compiling regex v1.1.2
[INFO] [stderr]    Compiling maud_htmlescape v0.17.0
[INFO] [stderr]    Compiling literalext v0.1.1
[INFO] [stderr]     Checking macro-utils v0.1.2
[INFO] [stderr]     Checking tokio-sync v0.1.3
[INFO] [stderr]    Compiling v_escape v0.3.2
[INFO] [stderr]    Compiling v_htmlescape v0.3.2
[INFO] [stderr]    Compiling actix-web v0.7.18
[INFO] [stderr]     Checking tower-service v0.1.0
[INFO] [stderr]     Checking regex-syntax v0.6.5
[INFO] [stderr]     Checking tokio-executor v0.1.6
[INFO] [stderr]     Checking crossbeam-channel v0.3.8
[INFO] [stderr]     Checking crc32fast v1.1.2
[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/literalext-0.1.1/src/lib.rs:19:37
[INFO] [stdout]    |
[INFO] [stdout] 19 | #![cfg_attr(feature = "proc-macro", feature(proc_macro))]
[INFO] [stdout]    |                                     ^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Checking serde v1.0.89
[INFO] [stderr]    Compiling rand_chacha v0.1.1
[INFO] [stderr]     Checking net2 v0.2.33
[INFO] [stderr]     Checking socket2 v0.3.8
[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]     Checking rand v0.5.6
[INFO] [stderr]     Checking hostname v0.1.5
[INFO] [stderr] error: could not compile `literalext`.
[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" "7653f9f2a7a6883d5a2e624de33cd3650de00285cdc0a327a07441ea4f5d6fbb", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "7653f9f2a7a6883d5a2e624de33cd3650de00285cdc0a327a07441ea4f5d6fbb", kill_on_drop: false }`
[INFO] [stdout] 7653f9f2a7a6883d5a2e624de33cd3650de00285cdc0a327a07441ea4f5d6fbb