[INFO] fetching crate fraction 0.6.3...
[INFO] checking fraction-0.6.3 against try#f6e2f78768c57172b99c3e85892f867894dc7e30 for pr-75502
[INFO] extracting crate fraction 0.6.3 into /workspace/builds/worker-10/source
[INFO] validating manifest of crates.io crate fraction 0.6.3 on toolchain f6e2f78768c57172b99c3e85892f867894dc7e30
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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-10/source/Cargo.toml
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "generate-lockfile" "--manifest-path" "Cargo.toml" "-Zno-index-update", kill_on_drop: false }`
[INFO] running `Command { std: "/workspace/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "fetch" "--locked" "--manifest-path" "Cargo.toml", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "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] 403c9b1b1c7e121fb6c2bc3ba5ffe81c484febf225da2f2f328f8c92a5bfef4e
[INFO] running `Command { std: "docker" "start" "-a" "403c9b1b1c7e121fb6c2bc3ba5ffe81c484febf225da2f2f328f8c92a5bfef4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "inspect" "403c9b1b1c7e121fb6c2bc3ba5ffe81c484febf225da2f2f328f8c92a5bfef4e", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "403c9b1b1c7e121fb6c2bc3ba5ffe81c484febf225da2f2f328f8c92a5bfef4e", kill_on_drop: false }`
[INFO] [stdout] 403c9b1b1c7e121fb6c2bc3ba5ffe81c484febf225da2f2f328f8c92a5bfef4e
[INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-10/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" "RUSTFLAGS=--cap-lints=forbid" "-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:a636fd89d022f18117e1dc8fb37a0a009933cdbbe082814857f0e2024962d47c" "/opt/rustwide/cargo-home/bin/cargo" "+f6e2f78768c57172b99c3e85892f867894dc7e30" "check" "--frozen" "--all" "--all-targets" "--message-format=json", kill_on_drop: false }`
[INFO] [stdout] efe0ff1e1ec3fecd1f9de1f25664b494debbf439e7dd92d759577e9f3dbc5729
[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" "efe0ff1e1ec3fecd1f9de1f25664b494debbf439e7dd92d759577e9f3dbc5729", kill_on_drop: false }`
[INFO] [stderr]    Compiling num-traits v0.2.12
[INFO] [stderr]    Compiling num-complex v0.2.4
[INFO] [stderr]    Compiling num-rational v0.2.4
[INFO] [stderr]    Compiling num-iter v0.1.41
[INFO] [stderr]     Checking num-integer v0.1.43
[INFO] [stderr]     Checking num-bigint v0.2.6
[INFO] [stderr]     Checking num v0.2.1
[INFO] [stderr]     Checking 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: 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] [stdout] warning: 6 warnings emitted
[INFO] [stdout] 
[INFO] [stdout] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 20.88s
[INFO] running `Command { std: "docker" "inspect" "efe0ff1e1ec3fecd1f9de1f25664b494debbf439e7dd92d759577e9f3dbc5729", kill_on_drop: false }`
[INFO] running `Command { std: "docker" "rm" "-f" "efe0ff1e1ec3fecd1f9de1f25664b494debbf439e7dd92d759577e9f3dbc5729", kill_on_drop: false }`
[INFO] [stdout] efe0ff1e1ec3fecd1f9de1f25664b494debbf439e7dd92d759577e9f3dbc5729