[INFO] fetching crate fraction 0.6.3...
[INFO] documenting fraction-0.6.3 against beta-2020-08-29 for beta-1.47-rustdoc-1
[INFO] extracting crate fraction 0.6.3 into /workspace/builds/worker-5/source
[INFO] validating manifest of crates.io crate fraction 0.6.3 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 fraction 0.6.3
[INFO] finished tweaking crates.io crate fraction 0.6.3
[INFO] tweaked toml for crates.io crate fraction 0.6.3 written to /workspace/builds/worker-5/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+beta-2020-08-29" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[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]     Blocking waiting for file lock on package cache
[INFO] [stderr]  Downloading crates ...
[INFO] [stderr]   Downloaded hex v0.2.0
[INFO] [stderr]   Downloaded safemem v0.2.0
[INFO] [stderr]   Downloaded juniper_codegen v0.11.1
[INFO] [stderr]   Downloaded byte-tools v0.2.0
[INFO] [stderr]   Downloaded base64 v0.6.0
[INFO] [stderr]   Downloaded stringprep v0.1.2
[INFO] [stderr]   Downloaded postgres-shared v0.4.2
[INFO] [stderr]   Downloaded postgres v0.15.2
[INFO] [stderr]   Downloaded fallible-iterator v0.1.6
[INFO] [stderr]   Downloaded crypto-mac v0.5.2
[INFO] [stderr]   Downloaded hmac v0.5.0
[INFO] [stderr]   Downloaded md5 v0.3.8
[INFO] [stderr]   Downloaded postgres-protocol v0.3.2
[INFO] [stderr]   Downloaded juniper v0.11.1
[INFO] [stderr]   Downloaded block-buffer v0.3.3
[INFO] [stderr]   Downloaded generic-array v0.9.0
[INFO] [stderr]   Downloaded digest v0.7.6
[INFO] [stderr]   Downloaded sha2 v0.7.1
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] cdf61b23f4f50589b19f7fd3ac9070f7ef06e733b83fd7accd64014d746fd3f0
[INFO] running `Command { std: "docker" "start" "-a" "cdf61b23f4f50589b19f7fd3ac9070f7ef06e733b83fd7accd64014d746fd3f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "cdf61b23f4f50589b19f7fd3ac9070f7ef06e733b83fd7accd64014d746fd3f0", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "cdf61b23f4f50589b19f7fd3ac9070f7ef06e733b83fd7accd64014d746fd3f0", kill_on_drop: false }`
[INFO] [stdout] cdf61b23f4f50589b19f7fd3ac9070f7ef06e733b83fd7accd64014d746fd3f0
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-5/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] 225296fb6cd0c78507adfb5b01eb0bf1e997f4f4571b2f75fe35b592163684d2
[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" "225296fb6cd0c78507adfb5b01eb0bf1e997f4f4571b2f75fe35b592163684d2", kill_on_drop: false }`
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]  Documenting fraction v0.6.3 (/opt/rustwide/workdir)
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/generic.rs:76:33
[INFO] [stdout]    |
[INFO] [stdout] 76 |     static ref _0_BU: BigUint = { BigUint::zero() };
[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/generic.rs:77:33
[INFO] [stdout]    |
[INFO] [stdout] 77 |     static ref _1_BU: BigUint = { BigUint::one() };
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/generic.rs:78:34
[INFO] [stdout]    |
[INFO] [stdout] 78 |     static ref _10_BU: BigUint = { BigUint::from(10u8) };
[INFO] [stdout]    |                                  ^^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/generic.rs:79:32
[INFO] [stdout]    |
[INFO] [stdout] 79 |     static ref _0_BI: BigInt = { BigInt::zero() };
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/generic.rs:80:32
[INFO] [stdout]    |
[INFO] [stdout] 80 |     static ref _1_BI: BigInt = { BigInt::one() };
[INFO] [stdout]    |                                ^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: unnecessary braces around block return value
[INFO] [stdout]   --> src/generic.rs:81:33
[INFO] [stdout]    |
[INFO] [stdout] 81 |     static ref _10_BI: BigInt = { BigInt::from(10i8) };
[INFO] [stdout]    |                                 ^^^^^^^^^^^^^^^^^^^^^^ help: remove these braces
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 3.14s
[INFO] running `Command { std: "docker" "inspect" "225296fb6cd0c78507adfb5b01eb0bf1e997f4f4571b2f75fe35b592163684d2", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "225296fb6cd0c78507adfb5b01eb0bf1e997f4f4571b2f75fe35b592163684d2", kill_on_drop: false }`
[INFO] [stdout] 225296fb6cd0c78507adfb5b01eb0bf1e997f4f4571b2f75fe35b592163684d2