[INFO] cloning repository https://github.com/nikhilm/threadtimes
[INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/nikhilm/threadtimes" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilm%2Fthreadtimes", kill_on_drop: false }`
[INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Fnikhilm%2Fthreadtimes'...
[INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }`
[INFO] [stdout] 207511ff6d14b8d7a499d9089c320ef8b8a0f890
[INFO] documenting nikhilm/threadtimes 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%2Fnikhilm%2Fthreadtimes" "/workspace/builds/worker-7/source", kill_on_drop: false }`
[INFO] [stderr] Cloning into '/workspace/builds/worker-7/source'...
[INFO] [stderr] done.
[INFO] validating manifest of git repo https://github.com/nikhilm/threadtimes 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/nikhilm/threadtimes
[INFO] finished tweaking git repo https://github.com/nikhilm/threadtimes
[INFO] tweaked toml for git repo https://github.com/nikhilm/threadtimes written to /workspace/builds/worker-7/source/Cargo.toml
[INFO] crate git repo https://github.com/nikhilm/threadtimes 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 thread-scoped v1.0.2
[INFO] [stderr]   Downloaded criterion-stats v0.2.5
[INFO] [stderr]   Downloaded criterion-plot v0.2.5
[INFO] [stderr]   Downloaded rustc-demangle v0.1.11
[INFO] [stderr]   Downloaded pest v1.0.6
[INFO] [stderr]   Downloaded handlebars v0.32.4
[INFO] [stderr]   Downloaded pest_derive v1.0.8
[INFO] [stderr]   Downloaded cc v1.0.26
[INFO] [stderr]   Downloaded backtrace-sys v0.1.26
[INFO] [stderr]   Downloaded term v0.5.1
[INFO] [stderr]   Downloaded itertools-num v0.1.3
[INFO] [stderr]   Downloaded simplelog v0.5.3
[INFO] [stderr]   Downloaded criterion v0.2.5
[INFO] [stderr]   Downloaded csv v1.0.3
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] d943064e33c67778e3fabbfa33ebb67899718c9401888dbd7bcb3bc8aa58d4a1
[INFO] running `Command { std: "docker" "start" "-a" "d943064e33c67778e3fabbfa33ebb67899718c9401888dbd7bcb3bc8aa58d4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "d943064e33c67778e3fabbfa33ebb67899718c9401888dbd7bcb3bc8aa58d4a1", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "d943064e33c67778e3fabbfa33ebb67899718c9401888dbd7bcb3bc8aa58d4a1", kill_on_drop: false }`
[INFO] [stdout] d943064e33c67778e3fabbfa33ebb67899718c9401888dbd7bcb3bc8aa58d4a1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7/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] dbfc598676c946dabb4d0bfd842c764c5c9d92caf6ebb80b1290250576a2cbb6
[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" "dbfc598676c946dabb4d0bfd842c764c5c9d92caf6ebb80b1290250576a2cbb6", kill_on_drop: false }`
[INFO] [stderr]    Compiling cc v1.0.26
[INFO] [stderr]     Checking cast v0.2.2
[INFO] [stderr]    Compiling pest v1.0.6
[INFO] [stderr]     Checking thread-scoped v1.0.2
[INFO] [stderr]     Checking term v0.5.1
[INFO] [stderr]     Checking itertools v0.7.11
[INFO] [stderr]     Checking time v0.1.41
[INFO] [stderr]     Checking num_cpus v1.9.0
[INFO] [stderr]     Checking atty v0.2.11
[INFO] [stderr]     Checking rand v0.4.3
[INFO] [stderr]     Checking itertools-num v0.1.3
[INFO] [stderr]     Checking memchr v2.1.2
[INFO] [stderr]    Compiling syn v0.15.23
[INFO] [stderr]     Checking clap v2.32.0
[INFO] [stderr]     Checking aho-corasick v0.6.9
[INFO] [stderr]     Checking csv-core v0.1.5
[INFO] [stderr]    Compiling pest_derive v1.0.8
[INFO] [stderr]     Checking csv v1.0.3
[INFO] [stderr]     Checking regex v1.1.0
[INFO] [stderr]     Checking chrono v0.4.6
[INFO] [stderr]     Checking criterion-stats v0.2.5
[INFO] [stderr]     Checking criterion-plot v0.2.5
[INFO] [stderr]    Compiling backtrace-sys v0.1.26
[INFO] [stderr]     Checking simplelog v0.5.3
[INFO] [stderr]     Checking backtrace v0.3.13
[INFO] [stderr]     Checking handlebars v0.32.4
[INFO] [stderr]    Compiling synstructure v0.10.1
[INFO] [stderr]    Compiling failure_derive v0.1.3
[INFO] [stderr]    Compiling serde_derive v1.0.82
[INFO] [stderr]     Checking failure v0.1.3
[INFO] [stderr]     Checking criterion v0.2.5
[INFO] [stderr]  Documenting threadtimes v0.1.0 (/opt/rustwide/workdir)
[INFO] [stdout] error[E0554]: `#![feature]` may not be used on the beta release channel
[INFO] [stdout]  --> src/lib.rs:1:1
[INFO] [stdout]   |
[INFO] [stdout] 1 | #![feature(uniform_paths)] 
[INFO] [stdout]   | ^^^^^^^^^^^^^^^^^^^^^^^^^^
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] error: Compilation failed, aborting rustdoc
[INFO] [stdout] 
[INFO] [stdout] 
[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 document `threadtimes`.
[INFO] [stderr] 
[INFO] [stderr] Caused by:
[INFO] [stderr]   process didn't exit successfully: `rustdoc --edition=2018 --crate-type lib --crate-name threadtimes src/lib.rs -o /opt/rustwide/target/doc --error-format=json --json=diagnostic-rendered-ansi --document-private-items -L dependency=/opt/rustwide/target/debug/deps --extern criterion=/opt/rustwide/target/debug/deps/libcriterion-1229926dd227f5a2.rmeta --extern libc=/opt/rustwide/target/debug/deps/liblibc-c814fb56dd6ce02a.rmeta --cap-lints=warn --crate-version 0.1.0` (exit code: 1)
[INFO] running `Command { std: "docker" "inspect" "dbfc598676c946dabb4d0bfd842c764c5c9d92caf6ebb80b1290250576a2cbb6", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "dbfc598676c946dabb4d0bfd842c764c5c9d92caf6ebb80b1290250576a2cbb6", kill_on_drop: false }`
[INFO] [stdout] dbfc598676c946dabb4d0bfd842c764c5c9d92caf6ebb80b1290250576a2cbb6