[INFO] fetching crate prometrics 0.1.13...
[INFO] documenting prometrics-0.1.13 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate prometrics 0.1.13 into /workspace/builds/worker-1/source
[INFO] validating manifest of crates.io crate prometrics 0.1.13 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 crates.io crate prometrics 0.1.13
[INFO] finished tweaking crates.io crate prometrics 0.1.13
[INFO] tweaked toml for crates.io crate prometrics 0.1.13 written to /workspace/builds/worker-1/source/Cargo.toml
[INFO] crate crates.io crate prometrics 0.1.13 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] 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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] a206116656b488a23ad1f7793e857d07368eb4245d60aef27b686dc9fce99597
[INFO] running `Command { std: "docker" "start" "-a" "a206116656b488a23ad1f7793e857d07368eb4245d60aef27b686dc9fce99597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "a206116656b488a23ad1f7793e857d07368eb4245d60aef27b686dc9fce99597", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "a206116656b488a23ad1f7793e857d07368eb4245d60aef27b686dc9fce99597", kill_on_drop: false }`
[INFO] [stdout] a206116656b488a23ad1f7793e857d07368eb4245d60aef27b686dc9fce99597
[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] 3b1880e9d93b3d048dc2ebb2b14f79c0f357af06f08faa4f4958d582a5c22165
[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" "3b1880e9d93b3d048dc2ebb2b14f79c0f357af06f08faa4f4958d582a5c22165", kill_on_drop: false }`
[INFO] [stderr]    Compiling proc-macro2 v1.0.10
[INFO] [stderr]     Checking procinfo v0.4.2
[INFO] [stderr]    Compiling quote v1.0.3
[INFO] [stderr]    Compiling syn v1.0.17
[INFO] [stderr]    Compiling trackable_derive v0.1.3
[INFO] [stderr]     Checking trackable v0.2.23
[INFO] [stderr]  Documenting prometrics v0.1.13 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/metrics/process.rs:17:31
[INFO] [stdout]    |
[INFO] [stdout] 17 |     static ref CLK_TCK: f64 = { unsafe { libc::sysconf(libc::_SC_CLK_TCK) as f64 } };
[INFO] [stdout]    |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout]    |
[INFO] [stdout]    = note: `#[warn(unused_braces)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/metrics/process.rs:18:34
[INFO] [stdout]    |
[INFO] [stdout] 18 |     static ref PAGESIZE: usize = { unsafe { libc::sysconf(libc::_SC_PAGESIZE) as usize } };
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 2 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 13.52s
[INFO] running `Command { std: "docker" "inspect" "3b1880e9d93b3d048dc2ebb2b14f79c0f357af06f08faa4f4958d582a5c22165", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "3b1880e9d93b3d048dc2ebb2b14f79c0f357af06f08faa4f4958d582a5c22165", kill_on_drop: false }`
[INFO] [stdout] 3b1880e9d93b3d048dc2ebb2b14f79c0f357af06f08faa4f4958d582a5c22165