[INFO] fetching crate differential-formula 0.1.1...
[INFO] documenting differential-formula-0.1.1 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate differential-formula 0.1.1 into /workspace/builds/worker-9/source
[INFO] validating manifest of crates.io crate differential-formula 0.1.1 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 differential-formula 0.1.1
[INFO] finished tweaking crates.io crate differential-formula 0.1.1
[INFO] tweaked toml for crates.io crate differential-formula 0.1.1 written to /workspace/builds/worker-9/source/Cargo.toml
[INFO] crate crates.io crate differential-formula 0.1.1 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 bitmaps v2.0.0
[INFO] [stderr]   Downloaded num-bigint v0.2.4
[INFO] [stderr]   Downloaded enum_dispatch v0.2.0
[INFO] [stderr]   Downloaded sized-chunks v0.5.1
[INFO] [stderr]   Downloaded im v14.1.0
[INFO] [stderr]   Downloaded readonly v0.1.5
[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] [stderr] WARNING: Your kernel does not support swap limit capabilities or the cgroup is not mounted. Memory limited without swap.
[INFO] [stdout] 8c1cebdaed948f46f74f9f28d8c4ec4177c3f3d4af8c19d1e0734cf9fc6b6911
[INFO] running `Command { std: "docker" "start" "-a" "8c1cebdaed948f46f74f9f28d8c4ec4177c3f3d4af8c19d1e0734cf9fc6b6911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "8c1cebdaed948f46f74f9f28d8c4ec4177c3f3d4af8c19d1e0734cf9fc6b6911", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "8c1cebdaed948f46f74f9f28d8c4ec4177c3f3d4af8c19d1e0734cf9fc6b6911", kill_on_drop: false }`
[INFO] [stdout] 8c1cebdaed948f46f74f9f28d8c4ec4177c3f3d4af8c19d1e0734cf9fc6b6911
[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] 233fb9f5f39e4dc0bf04f4db8e29d28663ab50bad9acab9ce2004dad8950c2b5
[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" "233fb9f5f39e4dc0bf04f4db8e29d28663ab50bad9acab9ce2004dad8950c2b5", kill_on_drop: false }`
[INFO] [stderr]     Blocking waiting for file lock on package cache
[INFO] [stderr]    Compiling syn v1.0.13
[INFO] [stderr]    Compiling serde v1.0.104
[INFO] [stderr]    Compiling memchr v2.2.1
[INFO] [stderr]     Checking timely_bytes v0.11.0
[INFO] [stderr]     Checking abomonation v0.7.3
[INFO] [stderr]     Checking timely_logging v0.11.1
[INFO] [stderr]     Checking rand_core v0.5.1
[INFO] [stderr]     Checking fixedbitset v0.2.0
[INFO] [stderr]     Checking timely_sort v0.1.6
[INFO] [stderr]    Compiling once_cell v1.2.0
[INFO] [stderr]    Compiling num-traits v0.2.10
[INFO] [stderr]    Compiling num-integer v0.1.41
[INFO] [stderr]    Compiling num-bigint v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.39
[INFO] [stderr]    Compiling num-rational v0.2.2
[INFO] [stderr]    Compiling num-complex v0.2.3
[INFO] [stderr]    Compiling nom v5.0.1
[INFO] [stderr]     Checking getopts v0.2.21
[INFO] [stderr]    Compiling im v14.1.0
[INFO] [stderr]    Compiling lexical-core v0.4.6
[INFO] [stderr]     Checking bitmaps v2.0.0
[INFO] [stderr]     Checking rand_xoshiro v0.4.0
[INFO] [stderr]     Checking rand v0.4.6
[INFO] [stderr]     Checking petgraph v0.5.0
[INFO] [stderr]     Checking sized-chunks v0.5.1
[INFO] [stderr]    Compiling synstructure v0.12.3
[INFO] [stderr]    Compiling serde_derive v1.0.104
[INFO] [stderr]    Compiling abomonation_derive v0.5.0
[INFO] [stderr]    Compiling readonly v0.1.5
[INFO] [stderr]    Compiling enum_dispatch v0.2.0
[INFO] [stderr]     Checking bincode v1.2.1
[INFO] [stderr]     Checking timely_communication v0.11.1
[INFO] [stderr]     Checking timely v0.11.1
[INFO] [stderr]     Checking num v0.2.0
[INFO] [stderr]     Checking differential-dataflow v0.11.0
[INFO] [stderr]  Documenting differential-formula v0.1.1 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary trailing semicolon
[INFO] [stdout]    --> src/engine.rs:343:27
[INFO] [stdout]     |
[INFO] [stdout] 343 |             );            ;
[INFO] [stdout]     |                           ^ help: remove this semicolon
[INFO] [stdout]     |
[INFO] [stdout]     = note: `#[warn(redundant_semicolons)]` on by default
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 1 warning emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1m 03s
[INFO] running `Command { std: "docker" "inspect" "233fb9f5f39e4dc0bf04f4db8e29d28663ab50bad9acab9ce2004dad8950c2b5", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "233fb9f5f39e4dc0bf04f4db8e29d28663ab50bad9acab9ce2004dad8950c2b5", kill_on_drop: false }`
[INFO] [stdout] 233fb9f5f39e4dc0bf04f4db8e29d28663ab50bad9acab9ce2004dad8950c2b5