[INFO] cloning repository https://github.com/rhysyngsun/renderer
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/rhysyngsun/renderer" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhysyngsun%2Frenderer", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhysyngsun%2Frenderer'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] c551e4b19c5b01e486c2c111b3b1d6afeed7d772
[INFO] documenting rhysyngsun/renderer against 1.47.0 for beta-1.48-rustdoc-1
[INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Frhysyngsun%2Frenderer" "/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/rhysyngsun/renderer on toolchain 1.47.0
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "read-manifest" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] started tweaking git repo https://github.com/rhysyngsun/renderer
[INFO] finished tweaking git repo https://github.com/rhysyngsun/renderer
[INFO] tweaked toml for git repo https://github.com/rhysyngsun/renderer written to /workspace/builds/worker-6/source/Cargo.toml
[INFO] crate git repo https://github.com/rhysyngsun/renderer already has a lockfile, it will not be regenerated
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+1.47.0" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded env_logger v0.3.5
[INFO] [stderr]   Downloaded num-bigint v0.1.35
[INFO] [stderr]   Downloaded num-complex v0.1.35
[INFO] [stderr]   Downloaded dtoa v0.4.1
[INFO] [stderr]   Downloaded strsim v0.5.2
[INFO] [stderr]   Downloaded syn v0.11.4
[INFO] [stderr]   Downloaded serde_derive v0.9.6
[INFO] [stderr]   Downloaded aho-corasick v0.6.1
[INFO] [stderr]   Downloaded serde_json v0.9.5
[INFO] [stderr]   Downloaded memchr v1.0.1
[INFO] [stderr]   Downloaded lazy_static v0.2.2
[INFO] [stderr]   Downloaded itoa v0.3.1
[INFO] [stderr]   Downloaded cargo_metadata v0.1.1
[INFO] [stderr]   Downloaded quote v0.3.12
[INFO] [stderr]   Downloaded num-rational v0.1.35
[INFO] [stderr]   Downloaded clippy v0.0.113
[INFO] [stderr]   Downloaded quine-mc_cluskey v0.2.4
[INFO] [stderr]   Downloaded docopt v0.6.86
[INFO] [stderr]   Downloaded regex_macros v0.1.38
[INFO] [stderr]   Downloaded semver v0.2.3
[INFO] [stderr]   Downloaded regex-syntax v0.4.0
[INFO] [stderr]   Downloaded regex v0.2.1
[INFO] [stderr]   Downloaded rustc-serialize v0.3.22
[INFO] [stderr]   Downloaded thread-id v3.0.0
[INFO] [stderr]   Downloaded thread_local v0.3.2
[INFO] [stderr]   Downloaded serde_codegen_internals v0.13.0
[INFO] [stderr]   Downloaded clippy_lints v0.0.113
[INFO] [stderr]   Downloaded matches v0.1.4
[INFO] [stderr]   Downloaded unicode-normalization v0.1.4
[INFO] [stderr]   Downloaded quickcheck v0.4.1
[INFO] [stderr]   Downloaded rand v0.3.15
[INFO] [stderr]   Downloaded libc v0.2.20
[INFO] [stderr]   Downloaded nom v2.1.0
[INFO] [stderr]   Downloaded serde v0.9.6
[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" "+1.47.0" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }`
[INFO] [stdout] 51e93dda1333d645819e597149a286a0bad5768ac3c937f51c0c90ee0143654f
[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" "51e93dda1333d645819e597149a286a0bad5768ac3c937f51c0c90ee0143654f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "51e93dda1333d645819e597149a286a0bad5768ac3c937f51c0c90ee0143654f", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "51e93dda1333d645819e597149a286a0bad5768ac3c937f51c0c90ee0143654f", kill_on_drop: false }`
[INFO] [stdout] 51e93dda1333d645819e597149a286a0bad5768ac3c937f51c0c90ee0143654f
[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" "+1.47.0" "doc" "--frozen" "--no-deps" "--document-private-items" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] 8db75345abe04e3caceeb6b9f3694d396c5c7629c4a49f51075a6fe717670176
[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" "8db75345abe04e3caceeb6b9f3694d396c5c7629c4a49f51075a6fe717670176", kill_on_drop: false }`
[INFO] [stderr]     Checking libc v0.2.20
[INFO] [stderr]     Checking num-traits v0.1.36
[INFO] [stderr]     Checking rustc-serialize v0.3.22
[INFO] [stderr]     Checking regex-syntax v0.3.9
[INFO] [stderr]     Checking utf8-ranges v0.1.3
[INFO] [stderr]     Checking strsim v0.5.2
[INFO] [stderr]     Checking lazy_static v0.2.2
[INFO] [stderr]     Checking nom v2.1.0
[INFO] [stderr]     Checking rand v0.3.15
[INFO] [stderr]     Checking memchr v0.1.11
[INFO] [stderr]     Checking thread-id v2.0.0
[INFO] [stderr]     Checking thread-id v3.0.0
[INFO] [stderr]     Checking memchr v1.0.1
[INFO] [stderr]     Checking thread_local v0.2.7
[INFO] [stderr]     Checking thread_local v0.3.2
[INFO] [stderr]     Checking aho-corasick v0.5.3
[INFO] [stderr]     Checking num-integer v0.1.32
[INFO] [stderr]     Checking aho-corasick v0.6.1
[INFO] [stderr]     Checking num-iter v0.1.32
[INFO] [stderr]     Checking regex v0.2.1
[INFO] [stderr]     Checking regex v0.1.80
[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/regex-0.1.80/src/lib.rs:451:34
[INFO] [stdout]     |
[INFO] [stdout] 451 | #![cfg_attr(feature = "pattern", feature(pattern))]
[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 `regex`.
[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" "8db75345abe04e3caceeb6b9f3694d396c5c7629c4a49f51075a6fe717670176", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8db75345abe04e3caceeb6b9f3694d396c5c7629c4a49f51075a6fe717670176", kill_on_drop: false }`
[INFO] [stdout] 8db75345abe04e3caceeb6b9f3694d396c5c7629c4a49f51075a6fe717670176
